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The prediction for future is difficult and when the cpuidle governor prediction
fails and govenor possibly choose the shallower C-state than it should. How to
quickly notice and find the failure becomes important for power saving.
cpuidle menu governor has a method to predict the repeat pattern if there are 8
C-states residency which are continuous and the same or very close, so it will
predict the next C-states residency will keep same residency time.
There is a real case that turbostat utility (tools/power/x86/turbostat)
at kernel 3.3 or early. turbostat utility will read 10 registers one by one at
Sandybridge, so it will generate 10 IPIs to wake up idle CPUs. So cpuidle menu
governor will predict it is repeat mode and there is another IPI wake up idle
CPU soon, so it keeps idle CPU stay at C1 state even though CPU is totally
idle. However, in the turbostat, following 10 registers reading is sleep 5
seconds by default, so the idle CPU will keep at C1 for a long time though it is
idle until break event occurs.
In a idle Sandybridge system, run "./turbostat -v", we will notice that deep
C-state dangles between "70% ~ 99%". After patched the kernel, we will notice
deep C-state stays at >99.98%.
In the patch, a timer is added when menu governor detects a repeat mode and
choose a shallow C-state. The timer is set to a time out value that greater
than predicted time, and we conclude repeat mode prediction failure if timer is
triggered. When repeat mode happens as expected, the timer is not triggered
and CPU waken up from C-states and it will cancel the timer initiatively.
When repeat mode does not happen, the timer will be time out and menu governor
will quickly notice that the repeat mode prediction fails and then re-evaluates
deeper C-states possibility.
Below is another case which will clearly show the patch much benefit:
#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>
#include <signal.h>
#include <sys/time.h>
#include <time.h>
#include <pthread.h>
volatile int * shutdown;
volatile long * count;
int delay = 20;
int loop = 8;
void usage(void)
{
fprintf(stderr,
"Usage: idle_predict [options]\n"
" --help -h Print this help\n"
" --thread -n Thread number\n"
" --loop -l Loop times in shallow Cstate\n"
" --delay -t Sleep time (uS)in shallow Cstate\n");
}
void *simple_loop() {
int idle_num = 1;
while (!(*shutdown)) {
*count = *count + 1;
if (idle_num % loop)
usleep(delay);
else {
/* sleep 1 second */
usleep(1000000);
idle_num = 0;
}
idle_num++;
}
}
static void sighand(int sig)
{
*shutdown = 1;
}
int main(int argc, char *argv[])
{
sigset_t sigset;
int signum = SIGALRM;
int i, c, er = 0, thread_num = 8;
pthread_t pt[1024];
static char optstr[] = "n:l:t:h:";
while ((c = getopt(argc, argv, optstr)) != EOF)
switch (c) {
case 'n':
thread_num = atoi(optarg);
break;
case 'l':
loop = atoi(optarg);
break;
case 't':
delay = atoi(optarg);
break;
case 'h':
default:
usage();
exit(1);
}
printf("thread=%d,loop=%d,delay=%d\n",thread_num,loop,delay);
count = malloc(sizeof(long));
shutdown = malloc(sizeof(int));
*count = 0;
*shutdown = 0;
sigemptyset(&sigset);
sigaddset(&sigset, signum);
sigprocmask (SIG_BLOCK, &sigset, NULL);
signal(SIGINT, sighand);
signal(SIGTERM, sighand);
for(i = 0; i < thread_num ; i++)
pthread_create(&pt[i], NULL, simple_loop, NULL);
for (i = 0; i < thread_num; i++)
pthread_join(pt[i], NULL);
exit(0);
}
Get powertop V2 from git://github.com/fenrus75/powertop, build powertop.
After build the above test application, then run it.
Test plaform can be Intel Sandybridge or other recent platforms.
#./idle_predict -l 10 &
#./powertop
We will find that deep C-state will dangle between 40%~100% and much time spent
on C1 state. It is because menu governor wrongly predict that repeat mode
is kept, so it will choose the C1 shallow C-state even though it has chance to
sleep 1 second in deep C-state.
While after patched the kernel, we find that deep C-state will keep >99.6%.
Signed-off-by: Rik van Riel <riel@redhat.com>
Signed-off-by: Youquan Song <youquan.song@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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Move the kobj initialization and completion in the sysfs.c
and encapsulate the code more.
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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The function needs the cpuidle_device which is initially passed to the
caller.
The current code gets the struct device from the struct cpuidle_device,
pass it the cpuidle_add_sysfs function. This function calls
per_cpu(cpuidle_devices, cpu) to get the cpuidle_device.
This patch pass the cpuidle_device instead and simplify the code.
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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Pull networking fixes from David Miller:
"Bug fixes galore, mostly in drivers as is often the case:
1) USB gadget and cdc_eem drivers need adjustments to their frame size
lengths in order to handle VLANs correctly. From Ian Coolidge.
2) TIPC and several network drivers erroneously call tasklet_disable
before tasklet_kill, fix from Xiaotian Feng.
3) r8169 driver needs to apply the WOL suspend quirk to more chipsets,
fix from Cyril Brulebois.
4) Fix multicast filters on RTL_GIGA_MAC_VER_35 r8169 chips, from
Nathan Walp.
5) FDB netlink dumps should use RTM_NEWNEIGH as the message type, not
zero. From John Fastabend.
6) Fix smsc95xx tx checksum offload on big-endian, from Steve
Glendinning.
7) __inet_diag_dump() needs to repsect and report the error value
returned from inet_diag_lock_handler() rather than ignore it.
Otherwise if an inet diag handler is not available for a particular
protocol, we essentially report success instead of giving an error
indication. Fix from Cyrill Gorcunov.
8) When the QFQ packet scheduler sees TSO/GSO packets it does not
handle things properly, and in fact ends up corrupting it's
datastructures as well as mis-schedule packets. Fix from Paolo
Valente.
9) Fix oopser in skb_loop_sk(), from Eric Leblond.
10) CXGB4 passes partially uninitialized datastructures in to FW
commands, fix from Vipul Pandya.
11) When we send unsolicited ipv6 neighbour advertisements, we should
send them to the link-local allnodes multicast address, as per
RFC4861. Fix from Hannes Frederic Sowa.
12) There is some kind of bug in the usbnet's kevent deferral
mechanism, but more immediately when it triggers an uncontrolled
stream of kernel messages spam the log. Rate limit the error log
message triggered when this problem occurs, as sending thousands
of error messages into the kernel log doesn't help matters at all,
and in fact makes further diagnosis more difficult.
From Steve Glendinning.
13) Fix gianfar restore from hibernation, from Wang Dongsheng.
14) The netlink message attribute sizes are wrong in the ipv6 GRE
driver, it was using the size of ipv4 addresses instead of ipv6
ones :-) Fix from Nicolas Dichtel."
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net:
gre6: fix rtnl dump messages
gianfar: ethernet vanishes after restoring from hibernation
usbnet: ratelimit kevent may have been dropped warnings
ipv6: send unsolicited neighbour advertisements to all-nodes
net: usb: cdc_eem: Fix rx skb allocation for 802.1Q VLANs
usb: gadget: g_ether: fix frame size check for 802.1Q
cxgb4: Fix initialization of SGE_CONTROL register
isdn: Make CONFIG_ISDN depend on CONFIG_NETDEVICES
cxgb4: Initialize data structures before using.
af-packet: fix oops when socket is not present
pkt_sched: enable QFQ to support TSO/GSO
net: inet_diag -- Return error code if protocol handler is missed
net: bnx2x: Fix typo in bnx2x driver
smsc95xx: fix tx checksum offload for big endian
rtnetlink: Use nlmsg type RTM_NEWNEIGH from dflt fdb dump
ptp: update adjfreq callback description
r8169: allow multicast packets on sub-8168f chipset.
r8169: Fix WoL on RTL8168d/8111d.
drivers/net: use tasklet_kill in device remove/close process
tipc: do not use tasklet_disable before tasklet_kill
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Pull sparc fixes from David Miller:
"Several build/bug fixes for sparc, including:
1) Configuring a mix of static vs. modular sparc64 crypto modules
didn't work, remove an ill-conceived attempt to only have to build
the device match table for these drivers once to fix the problem.
Reported by Meelis Roos.
2) Make the montgomery multiple/square and mpmul instructions actually
usable in 32-bit tasks. Essentially this involves providing 32-bit
userspace with a way to use a 64-bit stack when it needs to.
3) Our sparc64 atomic backoffs don't yield cpu strands properly on
Niagara chips. Use pause instruction when available to achieve
this, otherwise use a benign instruction we know blocks the strand
for some time.
4) Wire up kcmp
5) Fix the build of various drivers by removing the unnecessary
blocking of OF_GPIO when SPARC.
6) Fix unintended regression wherein of_address_to_resource stopped
being provided. Fix from Andreas Larsson.
7) Fix NULL dereference in leon_handle_ext_irq(), also from Andreas
Larsson."
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc:
sparc64: Fix build with mix of modular vs. non-modular crypto drivers.
sparc: Support atomic64_dec_if_positive properly.
of/address: sparc: Declare of_address_to_resource() as an extern function for sparc again
sparc32, leon: Check for existent irq_map entry in leon_handle_ext_irq
sparc: Add sparc support for platform_get_irq()
sparc: Allow OF_GPIO on sparc.
qlogicpti: Fix build warning.
sparc: Wire up sys_kcmp.
sparc64: Improvde documentation and readability of atomic backoff code.
sparc64: Use pause instruction when available.
sparc64: Fix cpu strand yielding.
sparc64: Make montmul/montsqr/mpmul usable in 32-bit threads.
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git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen
Pull Xen fixes from Konrad Rzeszutek Wilk:
"There are three ARM compile fixes (we forgot to export certain
functions and if the drivers are built as an module - we go belly-up).
There is also an mismatch of irq_enter() / exit_idle() calls sequence
which were fixed some time ago in other piece of codes, but failed to
appear in the Xen code.
Lastly a fix for to help in the field with troubleshooting in case we
cannot get the appropriate parameter and also fallback code when
working with very old hypervisors."
Bug-fixes:
- Fix compile issues on ARM.
- Fix hypercall fallback code for old hypervisors.
- Print out which HVM parameter failed if it fails.
- Fix idle notifier call after irq_enter.
* tag 'stable/for-linus-3.7-rc5-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen:
xen/arm: Fix compile errors when drivers are compiled as modules (export more).
xen/arm: Fix compile errors when drivers are compiled as modules.
xen/generic: Disable fallback build on ARM.
xen/events: fix RCU warning, or Call idle notifier after irq_enter()
xen/hvm: If we fail to fetch an HVM parameter print out which flag it is.
xen/hypercall: fix hypercall fallback code for very old hypervisors
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This adds sparc support for platform_get_irq that in the normal case use
platform_get_resource() to get an irq. This standard approach fails for sparc as
there are no resources of type IORESOURCE_IRQ for irqs for sparc.
Cross platform drivers can then use this standard platform function and work on
sparc instead of having to have a special case for sparc.
Signed-off-by: Andreas Larsson <andreas@gaisler.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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If a gianfar ethernet device is down prior to hibernating a
system, it will no longer be present upon system restore.
For example:
~# ifconfig eth0 down
~# echo disk > /sys/power/state
<trigger a restore from hibernation>
~# ifconfig eth0 up
SIOCSIFFLAGS: No such device
This happens because the restore function bails out early upon
finding devices that were not up at hibernation. In doing so,
it never gets to the netif_device_attach call at the end of
the restore function. Adding the netif_device_attach as done
here also makes the gfar_restore code consistent with what is
done in the gfar_resume code.
Cc: Claudiu Manoil <claudiu.manoil@freescale.com>
Signed-off-by: Wang Dongsheng <dongsheng.wang@freescale.com>
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Acked-by: Claudiu Manoil <claudiu.manoil@freescale.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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when something goes wrong, a flood of these messages can be
generated by usbnet (thousands per second). This doesn't
generally *help* the condition so this patch ratelimits the
rate of their generation.
There's an underlying problem in usbnet's kevent deferral
mechanism which needs fixing, specifically that events *can*
get dropped and not handled. This patch doesn't address this,
but just mitigates fallout caused by the current implemention.
Signed-off-by: Steve Glendinning <steve.glendinning@shawell.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Pull drm fixes (again) from Dave Airlie:
"dropped the ball on a vmware patch, so two more fixes for vmwgfx are
here, one for hibernate issue, one for a BUG trigger."
* 'drm-fixes' of git://people.freedesktop.org/~airlied/linux:
drm/vmwgfx: Fix a case where the code would BUG when trying to pin GMR memory
drm/vmwgfx: Fix hibernation device reset
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git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci
Pull PCI fixes from Bjorn Helgaas:
"Power management:
- PCI/PM: Fix proc config reg access for D3cold and bridge
suspending
- PCI/PM: Resume device before shutdown
- PCI/PM: Fix deadlock when unbinding device if parent in D3cold
Hotplug:
- PCI/portdrv: Don't create hotplug slots unless port supports
hotplug"
* tag '3.7-pci-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci:
PCI/portdrv: Don't create hotplug slots unless port supports hotplug
PCI/PM: Fix proc config reg access for D3cold and bridge suspending
PCI/PM: Resume device before shutdown
PCI/PM: Fix deadlock when unbinding device if parent in D3cold
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git://git.kernel.org/pub/scm/linux/kernel/git/cjb/mmc
Pull MMC fixes from Chris Ball:
- sdhci: fix a NULL dereference at resume-time, seen on OLPC XO-4
- sdhci: fix against 3.7-rc1 for UHS modes without a vqmmc regulator
- sdhci-of-esdhc: disable CMD23 on boards where it's broken
- sdhci-s3c: fix against 3.7-rc1 for card detection with runtime PM
- dw_mmc, omap_hsmmc: fix potential NULL derefs, compiler warnings
* tag 'mmc-fixes-for-3.7-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/cjb/mmc:
mmc: sdhci-s3c: fix the card detection in runtime-pm
mmc: sdhci-s3c: use clk_prepare_enable and clk_disable_unprepare
mmc: dw_mmc: constify dw_mci_idmac_ops in exynos back-end
mmc: dw_mmc: fix modular build for exynos back-end
mmc: sdhci: fix NULL dereference in sdhci_request() tuning
mmc: sdhci: fix IS_ERR() checking of regulator_get()
mmc: fix sdhci-dove probe/removal
mmc: sh_mmcif: fix use after free
mmc: sdhci-pci: fix 'Invalid iomem size' error message condition
mmc: mxcmmc: Fix MODULE_ALIAS
mmc: omap_hsmmc: fix NULL pointer dereference for dt boot
mmc: omap_hsmmc: fix host reference after mmc_free_host
mmc: dw_mmc: fix multiple drv_data NULL dereferences
mmc: dw_mmc: enable controller interrupt before calling mmc_start_host
mmc: sdhci-of-esdhc: disable CMD23 for some Freescale SoCs
mmc: dw_mmc: remove _dev_info compile warning
mmc: dw_mmc: convert the variable type of irq
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Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>
Reviewed-by: Brian Paul <brianp@vmware.com>
Reviewed-by: Dmitry Torokhov <dtor@vmware.com>
Cc: stable@vger.kernel.org
Cc: linux-graphics-maintainer@vmware.com
Signed-off-by: Dave Airlie <airlied@redhat.com>
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The device would not reset properly when resuming from hibernation.
Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>
Reviewed-by: Brian Paul <brianp@vmware.com>
Reviewed-by: Dmitry Torokhov <dtor@vmware.com>
Cc: stable@vger.kernel.org
Cc: linux-graphics-maintainer@vmware.com
Signed-off-by: Dave Airlie <airlied@redhat.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl
Pull pinctrl fixes from Linus Walleij:
- A set of SPEAr pinctrl fixes that recently arrived
- A fixup for the Samsung/Exynos Kconfig deps
* tag 'pinctrl-for-v3.7-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl:
pinctrl: samsung and exynos need to depend on OF && GPIOLIB
pinctrl: SPEAr1340: Add clcd sleep mode pin configuration
pinctrl: SPEAr1340: Make DDR reset & clock pads as gpio
pinctrl: SPEAr1310: add register entries for enabling pad direction
pinctrl: SPEAr1310: Separate out pci pins from pcie_sata pin group
pinctrl: SPEAr1310: Fix value of PERIP_CFG reigster and MCIF_SEL_SHIFT
pinctrl: SPEAr1310: fix clcd high resolution pin group name
pinctrl: SPEAr320: Correct pad mux entries for rmii/smii
pinctrl: SPEAr3xx: correct register space to configure pwm
pinctrl: SPEAr: Don't update all non muxreg bits on pinctrl_disable
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git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux
Pull s390 fixes from Martin Schwidefsky:
"A couple of bug fixes. I keep the fingers crossed that we now got
transparent huge pages ready for prime time."
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux:
s390/cio: fix length calculation in idset.c
s390/sclp: fix addressing mode clobber
s390: Move css limits from drivers/s390/cio/ to include/asm/.
s390/thp: respect page protection in pmd_none() and pmd_present()
s390/mm: use pmd_large() instead of pmd_huge()
s390/cio: suppress 2nd path verification during resume
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git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid
Pull HID fix from Jiri Kosina:
"This reverts a patch that causes regression in binding between HID
devices and drivers during device unplug/replug cycle."
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid:
HID: hidraw: put old deallocation mechanism in place
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Pull drm fixes from Dave Airlie:
"Just radeon and nouveau, mostly regressions fixers, and a couple of
radeon register checker fixes."
* 'drm-fixes' of git://people.freedesktop.org/~airlied/linux:
drm/nouveau: fix acpi edid retrieval
drm/nvc0/disp: fix regression in vblank semaphore release
drm/nv40/mpeg: fix context handling
drm/nv40/graph: fix typo in type names
drm/nv41/vm: fix typo in type name
drm/radeon/si: add some missing regs to the VM reg checker
drm/radeon/cayman: add some missing regs to the VM reg checker
drm/radeon/dce3: switch back to old pll allocation order for discrete
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git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux
Pull virtio and module fixes from Rusty Russell:
"YA module signing build tweak, and two cc'd to stable."
* tag 'fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux:
virtio: Don't access index after unregister.
modules: don't break modules_install on external modules with no key.
module: fix out-by-one error in kallsyms
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git://anongit.freedesktop.org/git/nouveau/linux-2.6 into drm-fixes
just some misc regression fixes and typo fixes.
* 'drm-nouveau-fixes' of git://anongit.freedesktop.org/git/nouveau/linux-2.6:
drm/nouveau: fix acpi edid retrieval
drm/nvc0/disp: fix regression in vblank semaphore release
drm/nv40/mpeg: fix context handling
drm/nv40/graph: fix typo in type names
drm/nv41/vm: fix typo in type name
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Virtio wants to release used indices after the corresponding
virtio device has been unregistered. However, virtio does not
hold an extra reference, giving up its last reference with
device_unregister(), making accessing dev->index afterwards
invalid.
I actually saw problems when testing my (not-yet-merged)
virtio-ccw code:
- device_add virtio-net,id=xxx
-> creates device virtio<n> with n>0
- device_del xxx
-> deletes virtio<n>, but calls ida_simple_remove with an
index of 0
- device_add virtio-net,id=xxx
-> tries to add virtio0, which is still in use...
So let's save the index we want to release before calling
device_unregister().
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Acked-by: Sjur Brændeland <sjur.brandeland@stericsson.com>
Cc: stable@kernel.org
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
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Commit c0077061e7ea accidentally inverted the logic for nouveau_acpi_edid,
causing it to only show a connector as connected when the edid could not
be retrieved with acpi.
Signed-off-by: Maarten Lankhorst <maarten.lankhorst@canonical.com>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
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Signed-off-by: Kelly Doran <kel.p.doran@gmail.com>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@canonical.com>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
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It slipped in thanks to typeless API.
Signed-off-by: Marcin Slusarz <marcin.slusarz@gmail.com>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
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nv04_graph_priv / nv04_graph_chan are not defined in this context...
Signed-off-by: Marcin Slusarz <marcin.slusarz@gmail.com>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
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It's a miracle it compiles at all - nv04_vm_priv does not exist
anywhere in the tree.
Signed-off-by: Marcin Slusarz <marcin.slusarz@gmail.com>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
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This register is needed for streamout to work properly.
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
Reviewed-by: Michel Dänzer <michel.daenzer@amd.com>
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These regs were being wronly rejected leading to rendering
issues.
fixes:
https://bugs.freedesktop.org/show_bug.cgi?id=56876
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
Reviewed-by: Michel Dänzer <michel.daenzer@amd.com>
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cdc_eem frames might need to contain 802.1Q VLAN Ethernet frames.
URB/skb sizing from usbnet will default to the hard_mtu,
so account for the VLAN header by expanding that via hard_header_len
Signed-off-by: Ian Coolidge <iancoolidge@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Checking skb->len against ETH_FRAME_LEN assumes a 1514
ethernet frame size. With an 802.1Q VLAN header, ethernet
frame length can now be 1518. Validate frame length against that.
Signed-off-by: Ian Coolidge <iancoolidge@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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INGPADBOUNDARY_MASK is already shifted. No need to shift it again. On reloading
a driver it was resulting in a bad SGE FL MTU sizes [1536, 9088] error. This
only causes an issue on systems that have L1 cache size of 32B, 128B, 512B,
2048B or 4096B.
Signed-off-by: Jay Hernandez <jay@chelsio.com>
Signed-off-by: Vipul Pandya <vipul@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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It doesn't make much sense to enable ISDN services if you don't
intend to connect to a network. Therefore insisting that ISDN
depends on NETDEVICES seems logical. We can then remove any
guards mentioning NETDEVICES inside all subordinate drivers.
This also has the nice side-effect of fixing the warning below
when ISDN_I4L && !CONFIG_NETDEVICES at compile time.
This patch fixes:
drivers/isdn/i4l/isdn_common.c: In function ‘isdn_ioctl’:
drivers/isdn/i4l/isdn_common.c:1278:8: warning: unused variable ‘s’ [-Wunused-variable]
Cc: Karsten Keil <isdn@linux-pingi.de>
Cc: netdev@vger.kernel.org
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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We should not assume reserve fields to be don't cares as fields may change.
Clearing data structures before using.
Signed-off-by: Jay Hernandez <jay@chelsio.com>
Signed-off-by: Vipul Pandya <vipul@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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If host clock is disabled, host cannot detect a card in case of using
CD internal for detection.
Signed-off-by: Seungwon Jeon <tgih.jun@samsung.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
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Convert clk_enable/clk_disable to clk_prepare_enable/clk_disable_unprepare
calls as required by common clock framework.
Signed-off-by: Thomas Abraham <thomas.abraham@linaro.org>
Signed-off-by: Chris Ball <cjb@laptop.org>
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The of_device_id match data is now marked as const and
must not be modified. This changes the dw_mmc to mark
all pointers passing the dw_mci_drv_data or dw_mci_dma_ops
structures as const, and also marks the static definitions
as const.
drivers/mmc/host/dw_mmc-exynos.c: In function 'dw_mci_exynos_probe':
drivers/mmc/host/dw_mmc-exynos.c:234:11: warning: assignment discards 'const' qualifier from pointer target type [enabled by default]
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Cc: Thomas Abraham <thomas.abraham@linaro.org>
Cc: Will Newton <will.newton@imgtec.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
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The MODULE_DEVICE_TABLE entry for dw_mci_exynos_match
was incorrectly copied from the platform back-end, which
causes this error when building the driver as a loadable
module:
drivers/mmc/host/dw_mmc-exynos.c: At top level:
drivers/mmc/host/dw_mmc-exynos.c:226:34: error: '__mod_of_device_table' aliased to undefined symbol 'dw_mci_pltfm_match'
This patch fixes the problem by just using the correct
string.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Cc: Thomas Abraham <thomas.abraham@linaro.org>
Cc: Will Newton <will.newton@imgtec.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
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Commit 473b095a72a9 ("mmc: sdhci: fix incorrect command used in tuning")
introduced a NULL dereference at resume-time if an SD 3.0 host controller
raises the SDHCI_NEEDS_TUNING flag while no card is inserted. Seen on an
OLPC XO-4 with sdhci-pxav3, but presumably affects other controllers too.
Signed-off-by: Chris Ball <cjb@laptop.org>
Cc: stable <stable@vger.kernel.org> [3.3+]
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There are two problems here:
The check for vmmc was printing an unnecessary pr_info() when
host->vmmc is NULL.
The intent of the check for vqmmc was to only remove UHS if we have a
regulator that doesn't support the required voltage, but since IS_ERR()
doesn't catch NULL, we were actually removing UHS modes if vqmmc isn't
present at all -- since it isn't present for most users, this breaks
UHS for them. This patch fixes that UHS regression in 3.7-rc1.
Signed-off-by: Kevin Liu <kliu5@marvell.com>
Signed-off-by: Bin Wang <binw@marvell.com>
Reviewed-by: Philip Rakity <prakity@marvell.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
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1. Never ever publish a device in the system before it has been setup
to a usable state.
2. Unregister the device _BEFORE_ taking away any resources it may be
using.
3. Don't check clks against NULL.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Tested-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
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A recent commit "mmc: sh_mmcif: fix clock management" has introduced a
use after free bug in sh_mmcif.c: in sh_mmcif_remove() the call to
mmc_free_host() frees private driver data, therefore using it afterwards
is a bug. Revert that hunk.
Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Cc: stable@vger.kernel.org [3.6]
Signed-off-by: Chris Ball <cjb@laptop.org>
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The SDHCI standard defines a 256 byte register set but a device
that specifies a larger iomem region is not an error. Alter the
message condition accordingly.
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
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The correct name for the driver is "mxc-mmc".
Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Acked-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Chris Ball <cjb@laptop.org>
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dev->platform_data is NULL in case of device tree boot,
instead use the saved version in struct omap_hsmmc_host.
Signed-off-by: Balaji T K <balajitk@ti.com>
Signed-off-by: Venkatraman S <svenkatr@ti.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
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struct omap_hsmmc_host *host should not be accessed after mmc_free_host().
Reorder mmc_free_host() after iounmap(host->base).
Signed-off-by: Balaji T K <balajitk@ti.com>
Signed-off-by: Venkatraman S <svenkatr@ti.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
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800d78bfccb3d ("mmc: dw_mmc: add support for implementation specific
callbacks") -- merged in v3.7-rc1 -- introduced multiple NULL pointer
dereferences when the default dw_mci_pltfm_probe() is used, as it sets
host->drv_data to NULL, and that's only checked against NULL in 1 out of
the 7 cases where it is dereferenced.
Signed-off-by: James Hogan <james.hogan@imgtec.com>
Acked-by: Jaehoon Chung <jh80.chung@samsung.com>
Acked-by: Will Newton <will.newton@imgtec.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
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As mmc_start_host is getting called before enabling the dw_mmc controller
interrupt, there is a problem of missing the SDMMC_INT_CMD_DONE for the
very first command sent by the sdio_reset.
This problem occurs only when we disable MMC debugging i.e, MMC_DEBUG=n.
This patch enables the dw_mmc controller interrupt before mmc_start_host.
Signed-off-by: Yuvaraj CD <yuvaraj.cd@samsung.com>
Reviewed-by: Girish K S <girish.shivananjappa@linaro.org>
Acked-by: Will Newton <will.newton@imgtec.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
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CMD23 causes lots of errors in kernel on some freescale SoCs
(P1020, P1021, P1022, P1024, P1025 and P4080) when MMC card used,
which is because these controllers does not support CMD23,
even on the SoCs which declares CMD23 is supported.
Therefore, we'll not use CMD23.
Signed-off-by: Jerry Huang <Chang-Ming.Huang@freescale.com>
Signed-off-by: Shaohui Xie <Shaohui.Xie@freescale.com>
Acked-by: Anton Vorontsov <cbouatmailru@gmail.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
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This patch removes the following warning.
drivers/mmc/host/dw_mmc.c:1976: warning: passing argument 1 of
'_dev_info' from incompatible pointer type
Signed-off-by: Seungwon Jeon <tgih.jun@samsung.com>
Acked-by: Will Newton <will.newton@imgtec.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
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As there is no need for it (the fallback code is for older
hypervisors and they only run under x86), and also b/c
we get:
drivers/xen/fallback.c: In function 'xen_event_channel_op_compat':
drivers/xen/fallback.c:10:19: error: storage size of 'op' isn't known
drivers/xen/fallback.c:15:2: error: implicit declaration of function '_hypercall1' [-Werror=implicit-function-declaration]
drivers/xen/fallback.c:15:19: error: expected expression before 'int'
drivers/xen/fallback.c:18:7: error: 'EVTCHNOP_close' undeclared (first use in this function)
drivers/xen/fallback.c:18:7: note: each undeclared identifier is reported only once for each function it appears in
.. and more
[v1: Moved the enablement to be covered by CONFIG_X86 per Ian's suggestion]
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
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