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The tqp_index is received from vf, if use it directly,
an out-of-bound issue may be caused, so add a check for
this tqp_index before using it in hclge_get_ring_chain_from_mbx().
Fixes: 84e095d64ed9 ("net: hns3: Change PF to add ring-vect binding & resetQ to mailbox")
Signed-off-by: Yufeng Mo <moyufeng@huawei.com>
Signed-off-by: Huazhong Tan <tanhuazhong@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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The queue_id is received from vf, if use it directly,
an out-of-bound issue may be caused, so add a check for
this queue_id before using it in hclge_reset_vf_queue().
Fixes: 1a426f8b40fc ("net: hns3: fix the VF queue reset flow error")
Signed-off-by: Yufeng Mo <moyufeng@huawei.com>
Signed-off-by: Huazhong Tan <tanhuazhong@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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There are several issues which may be seen when the link goes down while
forwarding traffic, all of which can be attributed to the fact that the
port flushing procedure from the reference manual was not closely
followed.
With flow control enabled on both the ingress port and the egress port,
it may happen when a link goes down that Ethernet packets are in flight.
In flow control mode, frames are held back and not dropped. When there
is enough traffic in flight (example: iperf3 TCP), then the ingress port
might enter congestion and never exit that state. This is a problem,
because it is the egress port's link that went down, and that has caused
the inability of the ingress port to send packets to any other port.
This is solved by flushing the egress port's queues when it goes down.
There is also a problem when performing stream splitting for
IEEE 802.1CB traffic (not yet upstream, but a sort of multicast,
basically). There, if one port from the destination ports mask goes
down, splitting the stream towards the other destinations will no longer
be performed. This can be traced down to this line:
ocelot_port_writel(ocelot_port, 0, DEV_MAC_ENA_CFG);
which should have been instead, as per the reference manual:
ocelot_port_rmwl(ocelot_port, 0, DEV_MAC_ENA_CFG_RX_ENA,
DEV_MAC_ENA_CFG);
Basically only DEV_MAC_ENA_CFG_RX_ENA should be disabled, but not
DEV_MAC_ENA_CFG_TX_ENA - I don't have further insight into why that is
the case, but apparently multicasting to several ports will cause issues
if at least one of them doesn't have DEV_MAC_ENA_CFG_TX_ENA set.
I am not sure what the state of the Ocelot VSC7514 driver is, but
probably not as bad as Felix/Seville, since VSC7514 uses phylib and has
the following in ocelot_adjust_link:
if (!phydev->link)
return;
therefore the port is not really put down when the link is lost, unlike
the DSA drivers which use .phylink_mac_link_down for that.
Nonetheless, I put ocelot_port_flush() in the common ocelot.c because it
needs to access some registers from drivers/net/ethernet/mscc/ocelot_rew.h
which are not exported in include/soc/mscc/ and a bugfix patch should
probably not move headers around.
Fixes: bdeced75b13f ("net: dsa: felix: Add PCS operations for PHYLINK")
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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The verdict returned from ena_xdp_execute() is used to determine the
fate of the RX buffer's page. In case of XDP Redirect/TX error the
verdict should be set to XDP_ABORTED, otherwise the page won't be freed.
Fixes: a318c70ad152 ("net: ena: introduce XDP redirect implementation")
Signed-off-by: Shay Agroskin <shayagr@amazon.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Normally we clear the failover_pending flag when processing the reset.
But if we are unable to schedule a failover reset we must clear the
flag ourselves. We could fail to schedule the reset if we are in PROBING
state (eg: when booting via kexec) or because we could not allocate memory.
Thanks to Cris Forno for helping isolate the problem and for testing.
Fixes: 1d8504937478 ("powerpc/vnic: Extend "failover pending" window")
Signed-off-by: Sukadev Bhattiprolu <sukadev@linux.ibm.com>
Tested-by: Cristobal Forno <cforno12@linux.ibm.com>
Link: https://lore.kernel.org/r/20210203050802.680772-1-sukadev@linux.ibm.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/kvalo/wireless-drivers
Kalle Valo says:
====================
wireless-drivers fixes for v5.11
Third, and most likely the last, set of fixes for v5.11. Two very
small fixes.
ath9k
* fix build regression related to LEDS_CLASS
mt76
* fix a memory leak
* tag 'wireless-drivers-2021-02-05' of git://git.kernel.org/pub/scm/linux/kernel/git/kvalo/wireless-drivers:
mt76: dma: fix a possible memory leak in mt76_add_fragment()
ath9k: fix build error with LEDS_CLASS=m
====================
Link: https://lore.kernel.org/r/20210205163434.14D94C433ED@smtp.codeaurora.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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When disable CBS, mode_to_use parameter is not updated even the operation
mode of Tx Queue is changed to Data Centre Bridging (DCB). Therefore,
when tc_setup_cbs() function is called to re-enable CBS, the operation
mode of Tx Queue remains at DCB, which causing CBS fails to work.
This patch updates the value of mode_to_use parameter to MTL_QUEUE_DCB
after operation mode of Tx Queue is changed to DCB in stmmac_dma_qmode()
callback function.
Fixes: 1f705bc61aee ("net: stmmac: Add support for CBS QDISC")
Suggested-by: Vinicius Costa Gomes <vinicius.gomes@intel.com>
Signed-off-by: Mohammad Athari Bin Ismail <mohammad.athari.ismail@intel.com>
Signed-off-by: Song, Yoong Siang <yoong.siang.song@intel.com>
Reviewed-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
Acked-by: Vinicius Costa Gomes <vinicius.gomes@intel.com>
Link: https://lore.kernel.org/r/1612447396-20351-1-git-send-email-yoong.siang.song@intel.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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The XDP frame's headroom might be large enough to accommodate the
xdpf backpointer as well as shifting the data to an aligned address.
Try this first before resorting to allocating a new buffer and copying
the data.
Suggested-by: Maciej Fijalkowski <maciej.fijalkowski@intel.com>
Signed-off-by: Camelia Groza <camelia.groza@nxp.com>
Acked-by: Maciej Fijalkowski <maciej.fijalkowski@intel.com>
Acked-by: Madalin Bucur <madalin.bucur@oss.nxp.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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The 256 byte data alignment is required for preventing DMA transaction
splits when crossing 4K page boundaries. Since XDP deals only with page
sized buffers or less, this restriction isn't needed. Instead, the data
only needs to be aligned to 64 bytes to prevent DMA transaction splits.
These lessened restrictions can increase performance by widening the pool
of permitted data alignments and preventing unnecessary realignments.
Fixes: ae680bcbd06a ("dpaa_eth: implement the A050385 erratum workaround for XDP")
Signed-off-by: Camelia Groza <camelia.groza@nxp.com>
Acked-by: Maciej Fijalkowski <maciej.fijalkowski@intel.com>
Acked-by: Madalin Bucur <madalin.bucur@oss.nxp.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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When the erratum workaround is triggered, the newly created xdp_frame
structure is stored at the start of the newly allocated buffer. Avoid
the structure from being overwritten by explicitly reserving enough
space in the buffer for storing it.
Account for the fact that the structure's size might increase in time by
aligning the headroom to DPAA_FD_DATA_ALIGNMENT bytes, thus guaranteeing
the data's alignment.
Fixes: ae680bcbd06a ("dpaa_eth: implement the A050385 erratum workaround for XDP")
Signed-off-by: Camelia Groza <camelia.groza@nxp.com>
Acked-by: Maciej Fijalkowski <maciej.fijalkowski@intel.com>
Acked-by: Madalin Bucur <madalin.bucur@oss.nxp.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Michael tried to enable Advanced Error Reporting through the ENETC's
Root Complex Event Collector, and the system started spitting out single
bit correctable ECC errors coming from the ENETC interfaces:
pcieport 0000:00:1f.0: AER: Multiple Corrected error received: 0000:00:00.0
fsl_enetc 0000:00:00.0: PCIe Bus Error: severity=Corrected, type=Transaction Layer, (Receiver ID)
fsl_enetc 0000:00:00.0: device [1957:e100] error status/mask=00004000/00000000
fsl_enetc 0000:00:00.0: [14] CorrIntErr
fsl_enetc 0000:00:00.1: PCIe Bus Error: severity=Corrected, type=Transaction Layer, (Receiver ID)
fsl_enetc 0000:00:00.1: device [1957:e100] error status/mask=00004000/00000000
fsl_enetc 0000:00:00.1: [14] CorrIntErr
Further investigating the port correctable memory error detect register
(PCMEDR) shows that these AER errors have an associated SOURCE_ID of 6
(RFS/RSS):
$ devmem 0x1f8010e10 32
0xC0000006
$ devmem 0x1f8050e10 32
0xC0000006
Discussion with the hardware design engineers reveals that on LS1028A,
the hardware does not do initialization of that RFS/RSS memory, and that
software should clear/initialize the entire table before starting to
operate. That comes as a bit of a surprise, since the driver does not do
initialization of the RFS memory. Also, the initialization of the
Receive Side Scaling is done only partially.
Even though the entire ENETC IP has a single shared flow steering
memory, the flow steering service should returns matches only for TCAM
entries that are within the range of the Station Interface that is doing
the search. Therefore, it should be sufficient for a Station Interface
to initialize all of its own entries in order to avoid any ECC errors,
and only the Station Interfaces in use should need initialization.
There are Physical Station Interfaces associated with PCIe PFs and
Virtual Station Interfaces associated with PCIe VFs. We let the PF
driver initialize the entire port's memory, which includes the RFS
entries which are going to be used by the VF.
Reported-by: Michael Walle <michael@walle.cc>
Fixes: d4fd0404c1c9 ("enetc: Introduce basic PF and VF ENETC ethernet drivers")
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Tested-by: Michael Walle <michael@walle.cc>
Reviewed-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
Link: https://lore.kernel.org/r/20210204134511.2640309-1-vladimir.oltean@nxp.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Commit 44144185951a0f ("hv_netvsc: Add validation for untrusted Hyper-V
values") added validation to rndis_filter_receive_data() (and
rndis_filter_receive()) which introduced NVSP_STAT_FAIL-scenarios where
the count is not updated/reset. Fix this omission, and prevent similar
scenarios from occurring in the future.
Reported-by: Juan Vazquez <juvazq@microsoft.com>
Signed-off-by: Andrea Parri (Microsoft) <parri.andrea@gmail.com>
Fixes: 44144185951a0f ("hv_netvsc: Add validation for untrusted Hyper-V values")
Reviewed-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
Link: https://lore.kernel.org/r/20210203113602.558916-1-parri.andrea@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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In gsi_channel_setup(), we check to see if the configuration data
contains any information about channels that are not supported by
the hardware. If one is found, we abort the setup process, but
the error code (ret) is not set in this case. Fix this bug.
Fixes: 650d1603825d8 ("soc: qcom: ipa: the generic software interface")
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Alex Elder <elder@linaro.org>
Link: https://lore.kernel.org/r/20210204010655.15619-1-elder@linaro.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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It's not meaningful to pass on LAPB error codes to HDLC code or other
parts of the system, because they will not understand the error codes.
Instead, use system-wide recognizable error codes.
Fixes: f362e5fe0f1f ("wan/hdlc_x25: make lapb params configurable")
Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
Signed-off-by: Xie He <xie.he.0141@gmail.com>
Acked-by: Martin Schiller <ms@dev.tdt.de>
Link: https://lore.kernel.org/r/20210203071541.86138-1-xie.he.0141@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Signed-off-by: Raju Rangoju <rajur@chelsio.com>
Link: https://lore.kernel.org/r/20210202182511.8109-1-rajur@chelsio.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Since commit 23025393dbeb3b8b3 ("xen/netback: use lateeoi irq binding")
xenvif_rx_ring_slots_available() is no longer called only from the rx
queue kernel thread, so it needs to access the rx queue with the
associated queue held.
Reported-by: Igor Druzhinin <igor.druzhinin@citrix.com>
Fixes: 23025393dbeb3b8b3 ("xen/netback: use lateeoi irq binding")
Signed-off-by: Juergen Gross <jgross@suse.com>
Acked-by: Wei Liu <wl@xen.org>
Link: https://lore.kernel.org/r/20210202070938.7863-1-jgross@suse.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Adding support for Cinterion MV31 with PID 0x00B7.
T: Bus=04 Lev=01 Prnt=01 Port=00 Cnt=01 Dev#= 11 Spd=5000 MxCh= 0
D: Ver= 3.20 Cls=ef(misc ) Sub=02 Prot=01 MxPS= 9 #Cfgs= 1
P: Vendor=1e2d ProdID=00b7 Rev=04.14
S: Manufacturer=Cinterion
S: Product=Cinterion USB Mobile Broadband
S: SerialNumber=b3246eed
C: #Ifs= 4 Cfg#= 1 Atr=a0 MxPwr=896mA
I: If#=0x0 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=ff Prot=ff Driver=qmi_wwan
I: If#=0x1 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=00 Prot=00 Driver=option
I: If#=0x2 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=00 Prot=00 Driver=option
I: If#=0x3 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=ff Prot=30 Driver=option
Signed-off-by: Christoph Schemmel <christoph.schemmel@gmail.com>
Link: https://lore.kernel.org/r/20210202084523.4371-1-christoph.schemmel@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Pull vdpa fix from Michael Tsirkin:
"A single mlx bugfix"
* tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost:
vdpa/mlx5: Fix memory key MTT population
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git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
Pull networking fixes from Jakub Kicinski:
"Networking fixes for 5.11-rc7, including fixes from bpf and mac80211
trees.
Current release - regressions:
- ip_tunnel: fix mtu calculation
- mlx5: fix function calculation for page trees
Previous releases - regressions:
- vsock: fix the race conditions in multi-transport support
- neighbour: prevent a dead entry from updating gc_list
- dsa: mv88e6xxx: override existent unicast portvec in port_fdb_add
Previous releases - always broken:
- bpf, cgroup: two copy_{from,to}_user() warn_on_once splats for BPF
cgroup getsockopt infra when user space is trying to race against
optlen, from Loris Reiff.
- bpf: add missing fput() in BPF inode storage map update helper
- udp: ipv4: manipulate network header of NATed UDP GRO fraglist
- mac80211: fix station rate table updates on assoc
- r8169: work around RTL8125 UDP HW bug
- igc: report speed and duplex as unknown when device is runtime
suspended
- rxrpc: fix deadlock around release of dst cached on udp tunnel"
* tag 'net-5.11-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (36 commits)
net: hsr: align sup_multicast_addr in struct hsr_priv to u16 boundary
net: ipa: fix two format specifier errors
net: ipa: use the right accessor in ipa_endpoint_status_skip()
net: ipa: be explicit about endianness
net: ipa: add a missing __iomem attribute
net: ipa: pass correct dma_handle to dma_free_coherent()
r8169: fix WoL on shutdown if CONFIG_DEBUG_SHIRQ is set
net/rds: restrict iovecs length for RDS_CMSG_RDMA_ARGS
net: mvpp2: TCAM entry enable should be written after SRAM data
net: lapb: Copy the skb before sending a packet
net/mlx5e: Release skb in case of failure in tc update skb
net/mlx5e: Update max_opened_tc also when channels are closed
net/mlx5: Fix leak upon failure of rule creation
net/mlx5: Fix function calculation for page trees
docs: networking: swap words in icmp_errors_use_inbound_ifaddr doc
udp: ipv4: manipulate network header of NATed UDP GRO fraglist
net: ip_tunnel: fix mtu calculation
vsock: fix the race conditions in multi-transport support
net: sched: replaced invalid qdisc tree flush helper in qdisc_replace
ibmvnic: device remove has higher precedence over reset
...
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git://git.kernel.org/pub/scm/linux/kernel/git/saeed/linux
Saeed Mahameed says:
====================
mlx5 fixes 2021-02-01
Please note the first patch in this series
("Fix function calculation for page trees") is fixing a regression
due to previous fix in net which you didn't include in your previous
rc pr. So I hope this series will make it into your next rc pr,
so mlx5 won't be broken in the next rc.
* tag 'mlx5-fixes-2021-02-01' of git://git.kernel.org/pub/scm/linux/kernel/git/saeed/linux:
net/mlx5e: Release skb in case of failure in tc update skb
net/mlx5e: Update max_opened_tc also when channels are closed
net/mlx5: Fix leak upon failure of rule creation
net/mlx5: Fix function calculation for page trees
====================
Link: https://lore.kernel.org/r/20210202070703.617251-1-saeed@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Fix two format specifiers that used %lu for a size_t in "ipa_mem.c".
Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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When extracting the destination endpoint ID from the status in
ipa_endpoint_status_skip(), u32_get_bits() is used. This happens to
work, but it's wrong: the structure field is only 8 bits wide
instead of 32.
Fix this by using u8_get_bits() to get the destination endpoint ID.
Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Sparse warns that the assignment of the metadata mask for a QMAP
endpoint in ipa_endpoint_init_hdr_metadata_mask() is a bad
assignment. We know we want the mask value to be big endian, even
though the value we write is in host byte order. Use a __force
tag to indicate we really mean it.
Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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The virt local variable in gsi_channel_state() does not have an
__iomem attribute but should. Fix this.
Signed-off-by: Alex Elder <elder@linaro.org>
Reviewed-by: Amy Parker <enbyamy@gmail.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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The "ring->addr = addr;" assignment is done a few lines later so we
can't use "ring->addr" yet. The correct dma_handle is "addr".
Fixes: 650d1603825d ("soc: qcom: ipa: the generic software interface")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: Alex Elder <elder@linaro.org>
Link: https://lore.kernel.org/r/YBjpTU2oejkNIULT@mwanda
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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So far phy_disconnect() is called before free_irq(). If CONFIG_DEBUG_SHIRQ
is set and interrupt is shared, then free_irq() creates an "artificial"
interrupt by calling the interrupt handler. The "link change" flag is set
in the interrupt status register, causing phylib to eventually call
phy_suspend(). Because the net_device is detached from the PHY already,
the PHY driver can't recognize that WoL is configured and powers down the
PHY.
Fixes: f1e911d5d0df ("r8169: add basic phylib support")
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Link: https://lore.kernel.org/r/fe732c2c-a473-9088-3974-df83cfbd6efd@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Last TCAM data contains TCAM enable bit.
It should be written after SRAM data before entry enabled.
Fixes: 3f518509dedc ("ethernet: Add new driver for Marvell Armada 375 network unit")
Signed-off-by: Stefan Chulski <stefanc@marvell.com>
Link: https://lore.kernel.org/r/1612172139-28343-1-git-send-email-stefanc@marvell.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/jberg/mac80211
Johannes Berg says:
====================
Two fixes:
- station rate tables were not updated correctly
after association, leading to bad configuration
- rtl8723bs (staging) was initializing data incorrectly
after the previous fix and needed to move the init
later
* tag 'mac80211-for-net-2021-02-02' of git://git.kernel.org/pub/scm/linux/kernel/git/jberg/mac80211:
staging: rtl8723bs: Move wiphy setup to after reading the regulatory settings from the chip
mac80211: fix station rate table updates on assoc
====================
Link: https://lore.kernel.org/r/20210202143505.37610-1-johannes@sipsolutions.net
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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In case of failure in tc update skb the packet is dropped
without freeing the skb.
Fixed by freeing the skb in case failure in tc update skb.
Fixes: d6d27782864f ("net/mlx5: E-Switch, Restore chain id on miss")
Fixes: c75690972228 ("net/mlx5e: Add tc chains offload support for nic flows")
Signed-off-by: Maor Dickman <maord@nvidia.com>
Reviewed-by: Roi Dayan <roid@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
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max_opened_tc is used for stats, so that potentially non-zero stats
won't disappear when num_tc decreases. However, mlx5e_setup_tc_mqprio
fails to update it in the flow where channels are closed.
This commit fixes it. The new value of priv->channels.params.num_tc is
always checked on exit. In case of errors it will just be the old value,
and in case of success it will be the updated value.
Fixes: 05909babce53 ("net/mlx5e: Avoid reset netdev stats on configuration changes")
Signed-off-by: Maxim Mikityanskiy <maximmi@mellanox.com>
Reviewed-by: Tariq Toukan <tariqt@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
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When creation of a new rule that requires allocation of an FTE fails,
need to call to tree_put_node on the FTE in order to release its'
resource.
Fixes: cefc23554fc2 ("net/mlx5: Fix FTE cleanup")
Signed-off-by: Maor Gottlieb <maorg@nvidia.com>
Reviewed-by: Alaa Hleihel <alaa@nvidia.com>
Reviewed-by: Mark Bloch <mbloch@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
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The function calculation always results in a value of 0. This works
generally, but when the release all pages feature is enabled it will
result in crashes.
Fixes: 0aa128475d33 ("net/mlx5: Maintain separate page trees for ECPF and PF functions")
Signed-off-by: Daniel Jurgens <danielj@nvidia.com>
Reported-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/tnguy/net-queue
Tony Nguyen says:
====================
Intel Wired LAN Driver Updates 2021-02-01
This series contains updates to igc and i40e drivers.
Kai-Heng Feng fixes igc to report unknown speed and duplex during suspend
as an attempted read will cause errors.
Kevin Lo sets the default value to -IGC_ERR_NVM instead of success for
writing shadow RAM as this could miss a timeout. Also propagates the return
value for Flow Control configuration to properly pass on errors for igc.
Aleksandr reverts commit 2ad1274fa35a ("i40e: don't report link up for a VF
who hasn't enabled queues") as this can cause link flapping.
* '1GbE' of git://git.kernel.org/pub/scm/linux/kernel/git/tnguy/net-queue:
i40e: Revert "i40e: don't report link up for a VF who hasn't enabled queues"
igc: check return value of ret_val in igc_config_fc_after_link_up
igc: set the default return value to -IGC_ERR_NVM in igc_write_nvm_srwr
igc: Report speed and duplex as unknown when device is runtime suspended
====================
Link: https://lore.kernel.org/r/20210201214618.852831-1-anthony.l.nguyen@intel.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
|
|
Returning -EBUSY in ibmvnic_remove() does not actually hold the
removal procedure since driver core doesn't care for the return
value (see __device_release_driver() in drivers/base/dd.c
calling dev->bus->remove()) though vio_bus_remove
(in arch/powerpc/platforms/pseries/vio.c) records the
return value and passes it on. [1]
During the device removal precedure, checking for resetting
bit is dropped so that we can continue executing all the
cleanup calls in the rest of the remove function. Otherwise,
it can cause latent memory leaks and kernel crashes.
[1] https://lore.kernel.org/linuxppc-dev/20210117101242.dpwayq6wdgfdzirl@pengutronix.de/T/#m48f5befd96bc9842ece2a3ad14f4c27747206a53
Reported-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Fixes: 7d7195a026ba ("ibmvnic: Do not process device remove during device reset")
Signed-off-by: Lijun Pan <ljp@linux.ibm.com>
Link: https://lore.kernel.org/r/20210129043402.95744-1-ljp@linux.ibm.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
|
|
Having multiple destination ports for a unicast address does not make
sense.
Make port_db_load_purge override existent unicast portvec instead of
adding a new port bit.
Fixes: 884729399260 ("net: dsa: mv88e6xxx: handle multiple ports in ATU")
Signed-off-by: DENG Qingfang <dqfext@gmail.com>
Reviewed-by: Vladimir Oltean <olteanv@gmail.com>
Link: https://lore.kernel.org/r/20210130134334.10243-1-dqfext@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
|
|
This reverts commit 2ad1274fa35ace5c6360762ba48d33b63da2396c
VF queues were not brought up when PF was brought up after being
downed if the VF driver disabled VFs queues during PF down.
This could happen in some older or external VF driver implementations.
The problem was that PF driver used vf->queues_enabled as a condition
to decide what link-state it would send out which caused the issue.
Remove the check for vf->queues_enabled in the VF link notify.
Now VF will always be notified of the current link status.
Also remove the queues_enabled member from i40e_vf structure as it is
not used anymore. Otherwise VNF implementation was broken and caused
a link flap.
The original commit was a workaround to avoid breaking existing VFs though
it's really a fault of the VF code not the PF. The commit should be safe to
revert as all of the VFs we know of have been fixed. Also, since we now
know there is a related bug in the workaround, removing it is preferred.
Fixes: 2ad1274fa35a ("i40e: don't report link up for a VF who hasn't enabled")
Signed-off-by: Aleksandr Loktionov <aleksandr.loktionov@intel.com>
Signed-off-by: Arkadiusz Kubalewski <arkadiusz.kubalewski@intel.com>
Tested-by: Konrad Jankowski <konrad0.jankowski@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
|
|
git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media
Pull media fixes from Mauro Carvalho Chehab:
"The rockship rkisp1 driver will be promoted from staging in 5.11.
While not too late, do a few uAPI changes which are needed to better
support its functionalities"
* tag 'media/v5.11-3' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media:
media: rockchip: rkisp1: extend uapi array sizes
media: rockchip: rkisp1: carry ip version information
media: rockchip: rkisp1: reduce number of histogram grid elements in uapi
media: rkisp1: stats: mask the hist_bins values
media: rkisp1: stats: remove a wrong cast to u8
media: rkisp1: uapi: change hist_bins array type from __u16 to __u32
|
|
settings from the chip
Commit 81f153faacd0 ("staging: rtl8723bs: fix wireless regulatory API
misuse") moved the wiphy_apply_custom_regulatory() call to earlier in the
driver's init-sequence, so that it gets called before wiphy_register().
But at this point in time the eFuses which code the regulatory-settings
for the chip have not been read by the driver yet, causing
_rtw_reg_apply_flags() to set the IEEE80211_CHAN_DISABLED flag on *all*
channels.
On the device where I initially tested the fix, a Jumper EZpad 7 tablet,
this does not cause any problems because shortly after init the
rtw_reg_notifier() gets called fixing things up. I guess this happens
into response to receiving a (broadcast) packet with regulatory info
from the access-point ?
But on another device with a RTL8723BS wifi chip, an Acer Switch 10E
(SW3-016), the rtw_reg_notifier() never gets called. I assume that some
fuse has been set on this device to ignore regulatory info received from
access-points.
This means that on the Acer the driver is stuck in a state with all
channels disabled, leading to non working Wifi.
We cannot move the wiphy_apply_custom_regulatory() call back, because
that call must be made before the wiphy_register() call.
Instead move the entire rtw_wdev_alloc() call to after the Efuses have
been read, fixing all channels being disabled in the initial channel-map.
Fixes: 81f153faacd0 ("staging: rtl8723bs: fix wireless regulatory API misuse")
Cc: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Link: https://lore.kernel.org/r/20210201152956.370186-2-hdegoede@redhat.com
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
|
|
Check return value from ret_val to make error check actually work.
Fixes: 4eb8080143a9 ("igc: Add setup link functionality")
Signed-off-by: Kevin Lo <kevlo@kevlo.org>
Acked-by: Sasha Neftin <sasha.neftin@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
|
|
This patch sets the default return value to -IGC_ERR_NVM in
igc_write_nvm_srwr. Without this change it wouldn't lead to a shadow RAM
write EEWR timeout.
Fixes: ab4056126813 ("igc: Add NVM support")
Signed-off-by: Kevin Lo <kevlo@kevlo.org>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
|
|
Similar to commit 165ae7a8feb5 ("igb: Report speed and duplex as unknown
when device is runtime suspended"), if we try to read speed and duplex
sysfs while the device is runtime suspended, igc will complain and
stops working:
[ 123.449883] igc 0000:03:00.0 enp3s0: PCIe link lost, device now detached
[ 123.450052] BUG: kernel NULL pointer dereference, address: 0000000000000008
[ 123.450056] #PF: supervisor read access in kernel mode
[ 123.450058] #PF: error_code(0x0000) - not-present page
[ 123.450059] PGD 0 P4D 0
[ 123.450064] Oops: 0000 [#1] SMP NOPTI
[ 123.450068] CPU: 0 PID: 2525 Comm: udevadm Tainted: G U W OE 5.10.0-1002-oem #2+rkl2-Ubuntu
[ 123.450078] RIP: 0010:igc_rd32+0x1c/0x90 [igc]
[ 123.450080] Code: c0 5d c3 b8 fd ff ff ff c3 0f 1f 44 00 00 0f 1f 44 00 00 55 89 f0 48 89 e5 41 56 41 55 41 54 49 89 c4 53 48 8b 57 08 48 01 d0 <44> 8b 28 41 83 fd ff 74 0c 5b 44 89 e8 41 5c 41 5d 4
[ 123.450083] RSP: 0018:ffffb0d100d6fcc0 EFLAGS: 00010202
[ 123.450085] RAX: 0000000000000008 RBX: ffffb0d100d6fd30 RCX: 0000000000000000
[ 123.450087] RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffff945a12716c10
[ 123.450089] RBP: ffffb0d100d6fce0 R08: ffff945a12716550 R09: ffff945a09874000
[ 123.450090] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000008
[ 123.450092] R13: ffff945a12716000 R14: ffff945a037da280 R15: ffff945a037da290
[ 123.450094] FS: 00007f3b34c868c0(0000) GS:ffff945b89200000(0000) knlGS:0000000000000000
[ 123.450096] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 123.450098] CR2: 0000000000000008 CR3: 00000001144de006 CR4: 0000000000770ef0
[ 123.450100] PKRU: 55555554
[ 123.450101] Call Trace:
[ 123.450111] igc_ethtool_get_link_ksettings+0xd6/0x1b0 [igc]
[ 123.450118] __ethtool_get_link_ksettings+0x71/0xb0
[ 123.450123] duplex_show+0x74/0xc0
[ 123.450129] dev_attr_show+0x1d/0x40
[ 123.450134] sysfs_kf_seq_show+0xa1/0x100
[ 123.450137] kernfs_seq_show+0x27/0x30
[ 123.450142] seq_read+0xb7/0x400
[ 123.450148] ? common_file_perm+0x72/0x170
[ 123.450151] kernfs_fop_read+0x35/0x1b0
[ 123.450155] vfs_read+0xb5/0x1b0
[ 123.450157] ksys_read+0x67/0xe0
[ 123.450160] __x64_sys_read+0x1a/0x20
[ 123.450164] do_syscall_64+0x38/0x90
[ 123.450168] entry_SYSCALL_64_after_hwframe+0x44/0xa9
[ 123.450170] RIP: 0033:0x7f3b351fe142
[ 123.450173] Code: c0 e9 c2 fe ff ff 50 48 8d 3d 3a ca 0a 00 e8 f5 19 02 00 0f 1f 44 00 00 f3 0f 1e fa 64 8b 04 25 18 00 00 00 85 c0 75 10 0f 05 <48> 3d 00 f0 ff ff 77 56 c3 0f 1f 44 00 00 48 83 ec 28 48 89 54 24
[ 123.450174] RSP: 002b:00007fffef2ec138 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
[ 123.450177] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f3b351fe142
[ 123.450179] RDX: 0000000000001001 RSI: 00005644c047f070 RDI: 0000000000000003
[ 123.450180] RBP: 00007fffef2ec340 R08: 00005644c047f070 R09: 00007f3b352d9320
[ 123.450182] R10: 00005644c047c010 R11: 0000000000000246 R12: 00005644c047cbf0
[ 123.450184] R13: 00005644c047e6d0 R14: 0000000000000003 R15: 00007fffef2ec140
[ 123.450189] Modules linked in: rfcomm ccm cmac algif_hash algif_skcipher af_alg bnep toshiba_acpi industrialio toshiba_haps hp_accel lis3lv02d btusb btrtl btbcm btintel bluetooth ecdh_generic ecc joydev input_leds nls_iso8859_1 snd_sof_pci snd_sof_intel_byt snd_sof_intel_ipc snd_sof_intel_hda_common snd_soc_hdac_hda snd_hda_codec_hdmi snd_sof_xtensa_dsp snd_sof_intel_hda snd_sof snd_hda_ext_core snd_soc_acpi_intel_match snd_soc_acpi snd_hda_codec_realtek snd_hda_codec_generic ledtrig_audio snd_hda_intel snd_intel_dspcfg soundwire_intel soundwire_generic_allocation soundwire_cadence snd_hda_codec snd_hda_core ath10k_pci snd_hwdep intel_rapl_msr intel_rapl_common ath10k_core soundwire_bus snd_soc_core x86_pkg_temp_thermal ath intel_powerclamp snd_compress ac97_bus snd_pcm_dmaengine mac80211 snd_pcm coretemp snd_seq_midi snd_seq_midi_event snd_rawmidi kvm_intel cfg80211 snd_seq snd_seq_device snd_timer mei_hdcp kvm libarc4 snd crct10dif_pclmul ghash_clmulni_intel aesni_intel
mei_me dell_wmi
[ 123.450266] dell_smbios soundcore sparse_keymap dcdbas crypto_simd cryptd mei dell_uart_backlight glue_helper ee1004 wmi_bmof intel_wmi_thunderbolt dell_wmi_descriptor mac_hid efi_pstore acpi_pad acpi_tad intel_cstate sch_fq_codel parport_pc ppdev lp parport ip_tables x_tables autofs4 btrfs blake2b_generic raid10 raid456 async_raid6_recov async_memcpy async_pq async_xor async_tx xor raid6_pq libcrc32c raid1 raid0 multipath linear dm_mirror dm_region_hash dm_log hid_generic usbhid hid i915 i2c_algo_bit drm_kms_helper syscopyarea sysfillrect sysimgblt fb_sys_fops cec crc32_pclmul rc_core drm intel_lpss_pci i2c_i801 ahci igc intel_lpss i2c_smbus idma64 xhci_pci libahci virt_dma xhci_pci_renesas wmi video pinctrl_tigerlake
[ 123.450335] CR2: 0000000000000008
[ 123.450338] ---[ end trace 9f731e38b53c35cc ]---
The more generic approach will be wrap get_link_ksettings() with begin()
and complete() callbacks, and calls runtime resume and runtime suspend
routine respectively. However, igc is like igb, runtime resume routine
uses rtnl_lock() which upper ethtool layer also uses.
So to prevent a deadlock on rtnl, take a different approach, use
pm_runtime_suspended() to avoid reading register while device is runtime
suspended.
Fixes: 8c5ad0dae93c ("igc: Add ethtool support")
Signed-off-by: Kai-Heng Feng <kai.heng.feng@canonical.com>
Acked-by: Sasha Neftin <sasha.neftin@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
|
|
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull EFI fix from Borislav Petkov:
"A single fix from Lukas: handle boolean device properties imported
from Apple firmware correctly"
* tag 'efi-urgent-for-v5.11' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
efi/apple-properties: Reinstate support for boolean properties
|
|
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull timer fix from Thomas Gleixner:
"A fix for handling advertised, but non-existent 146818 RTCs correctly.
With the recent UIP handling changes the time readout of non-existent
RTCs hangs forever as the read returns always 0xFF which means the UIP
bit is set.
Sanity check the RTC before registering by checking the RTC_VALID
register for correctness"
* tag 'timers-urgent-2021-01-31' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
rtc: mc146818: Detect and handle broken RTCs
|
|
git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux
Pull i2c fix from Wolfram Sang:
"Just one I2C driver update this time"
* 'i2c/for-current' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux:
i2c: mediatek: Move suspend and resume handling to NOIRQ phase
|
|
git://git.kernel.org/pub/scm/linux/kernel/git/pavel/linux-leds
Pull LED fixes from Pavel Machek:
"This pull is due to 'leds: trigger: fix potential deadlock with
libata' -- people find the warn annoying.
It also contains new driver and two trivial fixes"
* 'for-rc-5.11' of git://git.kernel.org/pub/scm/linux/kernel/git/pavel/linux-leds:
leds: rt8515: Add Richtek RT8515 LED driver
dt-bindings: leds: Add DT binding for Richtek RT8515
leds: trigger: fix potential deadlock with libata
leds: leds-ariel: convert comma to semicolon
leds: leds-lm3533: convert comma to semicolon
|
|
This adds a driver for the Richtek RT8515 dual channel
torch/flash white LED driver.
This LED driver is found in some mobile phones from
Samsung such as the GT-S7710 and GT-I8190.
A V4L interface is added.
We do not have a proper datasheet for the RT8515 but
it turns out that RT9387A has a public datasheet and
is essentially the same chip. We designed the driver
in accordance with this datasheet. The day someone
needs to drive a RT9387A this driver can probably
easily be augmented to handle that chip too.
Sakari Ailus, Pavel Machek and Andy Shevchenko helped
significantly in getting this driver right.
Cc: Sakari Ailus <sakari.ailus@iki.fi>
Cc: newbytee@protonmail.com
Cc: Stephan Gerhold <stephan@gerhold.net>
Cc: linux-media@vger.kernel.org
Cc: phone-devel@vger.kernel.org
Reviewed-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Pavel Machek <pavel@ucw.cz>
|
|
We have the following potential deadlock condition:
========================================================
WARNING: possible irq lock inversion dependency detected
5.10.0-rc2+ #25 Not tainted
--------------------------------------------------------
swapper/3/0 just changed the state of lock:
ffff8880063bd618 (&host->lock){-...}-{2:2}, at: ata_bmdma_interrupt+0x27/0x200
but this lock took another, HARDIRQ-READ-unsafe lock in the past:
(&trig->leddev_list_lock){.+.?}-{2:2}
and interrupts could create inverse lock ordering between them.
other info that might help us debug this:
Possible interrupt unsafe locking scenario:
CPU0 CPU1
---- ----
lock(&trig->leddev_list_lock);
local_irq_disable();
lock(&host->lock);
lock(&trig->leddev_list_lock);
<Interrupt>
lock(&host->lock);
*** DEADLOCK ***
no locks held by swapper/3/0.
the shortest dependencies between 2nd lock and 1st lock:
-> (&trig->leddev_list_lock){.+.?}-{2:2} ops: 46 {
HARDIRQ-ON-R at:
lock_acquire+0x15f/0x420
_raw_read_lock+0x42/0x90
led_trigger_event+0x2b/0x70
rfkill_global_led_trigger_worker+0x94/0xb0
process_one_work+0x240/0x560
worker_thread+0x58/0x3d0
kthread+0x151/0x170
ret_from_fork+0x1f/0x30
IN-SOFTIRQ-R at:
lock_acquire+0x15f/0x420
_raw_read_lock+0x42/0x90
led_trigger_event+0x2b/0x70
kbd_bh+0x9e/0xc0
tasklet_action_common.constprop.0+0xe9/0x100
tasklet_action+0x22/0x30
__do_softirq+0xcc/0x46d
run_ksoftirqd+0x3f/0x70
smpboot_thread_fn+0x116/0x1f0
kthread+0x151/0x170
ret_from_fork+0x1f/0x30
SOFTIRQ-ON-R at:
lock_acquire+0x15f/0x420
_raw_read_lock+0x42/0x90
led_trigger_event+0x2b/0x70
rfkill_global_led_trigger_worker+0x94/0xb0
process_one_work+0x240/0x560
worker_thread+0x58/0x3d0
kthread+0x151/0x170
ret_from_fork+0x1f/0x30
INITIAL READ USE at:
lock_acquire+0x15f/0x420
_raw_read_lock+0x42/0x90
led_trigger_event+0x2b/0x70
rfkill_global_led_trigger_worker+0x94/0xb0
process_one_work+0x240/0x560
worker_thread+0x58/0x3d0
kthread+0x151/0x170
ret_from_fork+0x1f/0x30
}
... key at: [<ffffffff83da4c00>] __key.0+0x0/0x10
... acquired at:
_raw_read_lock+0x42/0x90
led_trigger_blink_oneshot+0x3b/0x90
ledtrig_disk_activity+0x3c/0xa0
ata_qc_complete+0x26/0x450
ata_do_link_abort+0xa3/0xe0
ata_port_freeze+0x2e/0x40
ata_hsm_qc_complete+0x94/0xa0
ata_sff_hsm_move+0x177/0x7a0
ata_sff_pio_task+0xc7/0x1b0
process_one_work+0x240/0x560
worker_thread+0x58/0x3d0
kthread+0x151/0x170
ret_from_fork+0x1f/0x30
-> (&host->lock){-...}-{2:2} ops: 69 {
IN-HARDIRQ-W at:
lock_acquire+0x15f/0x420
_raw_spin_lock_irqsave+0x52/0xa0
ata_bmdma_interrupt+0x27/0x200
__handle_irq_event_percpu+0xd5/0x2b0
handle_irq_event+0x57/0xb0
handle_edge_irq+0x8c/0x230
asm_call_irq_on_stack+0xf/0x20
common_interrupt+0x100/0x1c0
asm_common_interrupt+0x1e/0x40
native_safe_halt+0xe/0x10
arch_cpu_idle+0x15/0x20
default_idle_call+0x59/0x1c0
do_idle+0x22c/0x2c0
cpu_startup_entry+0x20/0x30
start_secondary+0x11d/0x150
secondary_startup_64_no_verify+0xa6/0xab
INITIAL USE at:
lock_acquire+0x15f/0x420
_raw_spin_lock_irqsave+0x52/0xa0
ata_dev_init+0x54/0xe0
ata_link_init+0x8b/0xd0
ata_port_alloc+0x1f1/0x210
ata_host_alloc+0xf1/0x130
ata_host_alloc_pinfo+0x14/0xb0
ata_pci_sff_prepare_host+0x41/0xa0
ata_pci_bmdma_prepare_host+0x14/0x30
piix_init_one+0x21f/0x600
local_pci_probe+0x48/0x80
pci_device_probe+0x105/0x1c0
really_probe+0x221/0x490
driver_probe_device+0xe9/0x160
device_driver_attach+0xb2/0xc0
__driver_attach+0x91/0x150
bus_for_each_dev+0x81/0xc0
driver_attach+0x1e/0x20
bus_add_driver+0x138/0x1f0
driver_register+0x91/0xf0
__pci_register_driver+0x73/0x80
piix_init+0x1e/0x2e
do_one_initcall+0x5f/0x2d0
kernel_init_freeable+0x26f/0x2cf
kernel_init+0xe/0x113
ret_from_fork+0x1f/0x30
}
... key at: [<ffffffff83d9fdc0>] __key.6+0x0/0x10
... acquired at:
__lock_acquire+0x9da/0x2370
lock_acquire+0x15f/0x420
_raw_spin_lock_irqsave+0x52/0xa0
ata_bmdma_interrupt+0x27/0x200
__handle_irq_event_percpu+0xd5/0x2b0
handle_irq_event+0x57/0xb0
handle_edge_irq+0x8c/0x230
asm_call_irq_on_stack+0xf/0x20
common_interrupt+0x100/0x1c0
asm_common_interrupt+0x1e/0x40
native_safe_halt+0xe/0x10
arch_cpu_idle+0x15/0x20
default_idle_call+0x59/0x1c0
do_idle+0x22c/0x2c0
cpu_startup_entry+0x20/0x30
start_secondary+0x11d/0x150
secondary_startup_64_no_verify+0xa6/0xab
This lockdep splat is reported after:
commit e918188611f0 ("locking: More accurate annotations for read_lock()")
To clarify:
- read-locks are recursive only in interrupt context (when
in_interrupt() returns true)
- after acquiring host->lock in CPU1, another cpu (i.e. CPU2) may call
write_lock(&trig->leddev_list_lock) that would be blocked by CPU0
that holds trig->leddev_list_lock in read-mode
- when CPU1 (ata_ac_complete()) tries to read-lock
trig->leddev_list_lock, it would be blocked by the write-lock waiter
on CPU2 (because we are not in interrupt context, so the read-lock is
not recursive)
- at this point if an interrupt happens on CPU0 and
ata_bmdma_interrupt() is executed it will try to acquire host->lock,
that is held by CPU1, that is currently blocked by CPU2, so:
* CPU0 blocked by CPU1
* CPU1 blocked by CPU2
* CPU2 blocked by CPU0
*** DEADLOCK ***
The deadlock scenario is better represented by the following schema
(thanks to Boqun Feng <boqun.feng@gmail.com> for the schema and the
detailed explanation of the deadlock condition):
CPU 0: CPU 1: CPU 2:
----- ----- -----
led_trigger_event():
read_lock(&trig->leddev_list_lock);
<workqueue>
ata_hsm_qc_complete():
spin_lock_irqsave(&host->lock);
write_lock(&trig->leddev_list_lock);
ata_port_freeze():
ata_do_link_abort():
ata_qc_complete():
ledtrig_disk_activity():
led_trigger_blink_oneshot():
read_lock(&trig->leddev_list_lock);
// ^ not in in_interrupt() context, so could get blocked by CPU 2
<interrupt>
ata_bmdma_interrupt():
spin_lock_irqsave(&host->lock);
Fix by using read_lock_irqsave/irqrestore() in led_trigger_event(), so
that no interrupt can happen in between, preventing the deadlock
condition.
Apply the same change to led_trigger_blink_setup() as well, since the
same deadlock scenario can also happen in power_supply_update_bat_leds()
-> led_trigger_blink() -> led_trigger_blink_setup() (workqueue context),
and potentially prevent other similar usages.
Link: https://lore.kernel.org/lkml/20201101092614.GB3989@xps-13-7390/
Fixes: eb25cb9956cc ("leds: convert IDE trigger to common disk trigger")
Signed-off-by: Andrea Righi <andrea.righi@canonical.com>
Signed-off-by: Pavel Machek <pavel@ucw.cz>
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Replace a comma between expression statements by a semicolon.
Signed-off-by: Zheng Yongjun <zhengyongjun3@huawei.com>
Reviewed-by: Alexander Dahl <ada@thorsis.com>
Signed-off-by: Pavel Machek <pavel@ucw.cz>
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Replace a comma between expression statements by a semicolon.
Signed-off-by: Zheng Yongjun <zhengyongjun3@huawei.com>
Signed-off-by: Pavel Machek <pavel@ucw.cz>
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git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi
Pull SCSI fixes from James Bottomley:
"Two minor fixes in drivers. Both changing strings (one in a comment,
one in a module help text) with no code impact"
* tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi:
scsi: qla2xxx: Fix description for parameter ql2xenforce_iocb_limit
scsi: target: iscsi: Fix typo in comment
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