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2017-03-28soc: qcom: smd: Remove standalone driverBjorn Andersson1-1/+0
Remove the standalone SMD implementation as we have transitioned the client drivers to use the RPMSG based one. Also remove all dependencies on QCOM_SMD from Kconfig files, in order to keep them selectable in the absence of the removed symbol. Acked-by: Andy Gross <andy.gross@linaro.org> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-03-02Merge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhostLinus Torvalds1-1/+1
Pull vhost updates from Michael Tsirkin: "virtio, vhost: optimizations, fixes Looks like a quiet cycle for vhost/virtio, just a couple of minor tweaks. Most notable is automatic interrupt affinity for blk and scsi. Hopefully other devices are not far behind" * tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost: virtio-console: avoid DMA from stack vhost: introduce O(1) vq metadata cache virtio_scsi: use virtio IRQ affinity virtio_blk: use virtio IRQ affinity blk-mq: provide a default queue mapping for virtio device virtio: provide a method to get the IRQ affinity mask for a virtqueue virtio: allow drivers to request IRQ affinity when creating VQs virtio_pci: simplify MSI-X setup virtio_pci: don't duplicate the msix_enable flag in struct pci_dev virtio_pci: use shared interrupts for virtqueues virtio_pci: remove struct virtio_pci_vq_info vhost: try avoiding avail index access when getting descriptor virtio_mmio: expose header to userspace
2017-02-27virtio: allow drivers to request IRQ affinity when creating VQsChristoph Hellwig1-1/+1
Add a struct irq_affinity pointer to the find_vqs methods, which if set is used to tell the PCI layer to create the MSI-X vectors for our I/O virtqueues with the proper affinity from the start. Compared to after the fact affinity hints this gives us an instantly working setup and allows to allocate the irq descritors node-local and avoid interconnect traffic. Last but not least this will allow blk-mq queues are created based on the interrupt affinity for storage drivers. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Jason Wang <jasowang@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2017-02-13rpmsg: rpmsg_create_ept() returns NULL on errorBjorn Andersson1-1/+1
The parameter validation incorrectly returned an ERR_PTR(), which is not handled by the callers to rpmsg_create_ept(), per the definition NULL should be returned. Fixes: 93e9324431c9 ("rpmsg: Handle invalid parameters in public API") Reported-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2017-01-30rpmsg: unlock on error in rpmsg_eptdev_read()Dan Carpenter1-2/+1
We should unlock before returning if skb_dequeue() returns a NULL. Fixes: c0cdc19f84a4 ("rpmsg: Driver for user space endpoint interface") Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2017-01-18rpmsg: char: add CONFIG_NET dependencyArnd Bergmann1-0/+1
Without CONFIG_NET, we get a build failure for the new driver: ERROR: "skb_queue_tail" [drivers/rpmsg/rpmsg_char.ko] undefined! ERROR: "skb_put" [drivers/rpmsg/rpmsg_char.ko] undefined! ERROR: "__alloc_skb" [drivers/rpmsg/rpmsg_char.ko] undefined! ERROR: "kfree_skb" [drivers/rpmsg/rpmsg_char.ko] undefined! ERROR: "skb_dequeue" [drivers/rpmsg/rpmsg_char.ko] undefined! This adds a dependency so we don't try to build the broken configuration. Fixes: c0cdc19f84a4 ("rpmsg: Driver for user space endpoint interface") Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2017-01-18rpmsg: smd: Register rpmsg user space interface for edgesBjorn Andersson1-0/+20
Create and register a rpmsg device for use with the rpmsg user space interface, allowing user space to access SMD channels. Also provide the "rpmsg_name" device attribute to expose the edge name in sysfs, allowing the user to write udev rules for specific rpmsg devices and their children. Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2017-01-18rpmsg: Driver for user space endpoint interfaceBjorn Andersson4-0/+609
This driver allows rpmsg instances to expose access to rpmsg endpoints to user space processes. It provides a control interface, allowing userspace to export endpoints and an endpoint interface for each exposed endpoint. The implementation is based on prior art by Texas Instrument, Google, PetaLogix and was derived from a FreeRTOS performance statistics driver written by Michal Simek. The control interface provides a "create endpoint" ioctl, which is fed a name, source and destination address. The three values are used to create the endpoint, in a backend-specific way, and a rpmsg endpoint device is created - with the three parameters are available in sysfs for udev usage. E.g. to create an endpoint device for one of the Qualcomm SMD channel related to DIAG one would issue: struct rpmsg_endpoint_info info = { "DIAG_CNTL", 0, 0 }; int fd = open("/dev/rpmsg_ctrl0", O_RDWR); ioctl(fd, RPMSG_CREATE_EPT_IOCTL, &info); Each created endpoint device shows up as an individual character device in /dev, allowing permission to be controlled on a per-endpoint basis. The rpmsg endpoint will be created and destroyed following the opening and closing of the endpoint device, allowing rpmsg backends to open and close the physical channel, if supported by the wire protocol. Cc: Marek Novak <marek.novak@nxp.com> Cc: Matteo Sartori <matteo.sartori@t3lab.it> Cc: Michal Simek <monstr@monstr.eu> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2017-01-18rpmsg: qcom_smd: Implement endpoint "poll"Bjorn Andersson1-0/+16
Add support for polling the status of the write buffer so that user space can use rpmsg character devices in non-blocking mode. Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2017-01-18rpmsg: Introduce "poll" to endpoint opsBjorn Andersson2-0/+23
This allows rpmsg backends to implement polling of the outgoing buffer, which provides poll support to user space when using the rpmsg character device. Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2017-01-18rpmsg: qcom_smd: Add support for "label" propertyBjorn Andersson1-0/+22
Add support for the "label" property, used to give the edge a name other than the one of the DT node. This allows the implementor to provide consistently named edges when using the rpmsg character device. Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2016-12-30rpmsg: virtio_rpmsg_bus: fix channel creationLoic Pallardy1-2/+2
Since commit 4dffed5b3ac796b ("rpmsg: Name rpmsg devices based on channel id"), it is no more possible for a firmware to register twice a service (on different endpoints). rpmsg_register_device function is failing when calling device_add for the second time as second device has the same name as first one already register. It is because name is based only on service name and so is not more unique. Previously name was unique thanks to the use of rpmsg_dev_index. This patch adds destination and source endpoint numbers device name to create an unique identifier. Fixes: 4dffed5b3ac7 ("rpmsg: Name rpmsg devices based on channel id") Acked-by: Peter Griffin <peter.griffin@linaro.org> Signed-off-by: Loic Pallardy <loic.pallardy@st.com> [bjorn: flipped name and address in device name] Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2016-12-13Merge tag 'rpmsg-v4.10' of git://github.com/andersson/remoteprocLinus Torvalds2-28/+63
Pull rpmsg updates from Bjorn Andersson: "Argument validation in public functions, function stubs for COMPILE_TEST-ing clients, preparation for exposing rpmsg endponts to user space and minor Qualcomm SMD fixes" * tag 'rpmsg-v4.10' of git://github.com/andersson/remoteproc: dt-binding: soc: qcom: smd: Add label property rpmsg: qcom_smd: Correct return value for O_NONBLOCK rpmsg: Provide function stubs for API rpmsg: Handle invalid parameters in public API rpmsg: Support drivers without primary endpoint rpmsg: Introduce a driver override mechanism rpmsg: smd: Reduce restrictions when finding channel
2016-12-08rpmsg: qcom_smd: Correct return value for O_NONBLOCKBjorn Andersson1-1/+1
qcom_smd_send() should return -EAGAIN for non-blocking channels with insufficient space, so that we can propagate this event to user space. Fixes: 53e2822e56c7 ("rpmsg: Introduce Qualcomm SMD backend") Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2016-11-14rpmsg: smd: Expose edge registration functionsBjorn Andersson1-0/+1
The edge registration functions is to be used from a remoteproc driver to register and unregister an edge as the remote processor comes and goes. Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2016-10-31rpmsg: Handle invalid parameters in public APIBjorn Andersson1-2/+37
There are two cases of possible uninitialized pointer usage in the API, either the parameters themselves are invalid or we're trying to jump to functions not required to be implemented by all backends. Suggested-by: Loic Pallardy <loic.pallardy@st.com> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2016-10-31rpmsg: Support drivers without primary endpointBjorn Andersson1-14/+18
Some types of rpmsg drivers does not have a primary endpoint to tie their existence upon, but wishes to create and destroy endpoints dynamically, e.g. based on user interactions. Allow rpmsg drivers to omit a driver callback to signal this case and make the probe path not create a primary endpoint in this case. Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2016-10-31rpmsg: Introduce a driver override mechanismBjorn Andersson1-0/+3
Similar to other subsystems it's useful to provide a mechanism to force a specific driver match on a device, so introduce this. Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2016-10-31rpmsg: smd: Reduce restrictions when finding channelBjorn Andersson1-11/+4
SMD channels are created by the remotes in "opening" state, but sometimes as we close and try to reopen them they linger in closing state. Following the search for a matching channel the create_ept() will verify that the channel is in a suitable state, so we can lax the restrictions of the search function to work around above difference in behaviour. Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2016-09-12rpmsg: smd: fix dependency on QCOM_SMD=nArnd Bergmann1-1/+1
The ARM allmodconfig build broke with the addition of the SMD rpmsg driver that conflicts with the driver its replaces: WARNING: drivers/soc/qcom/smd: 'qcom_smd_register_edge' exported twice. Previous export was in drivers/rpmsg/qcom_smd.ko WARNING: drivers/soc/qcom/smd: 'qcom_smd_unregister_edge' exported twice. Previous export was in drivers/rpmsg/qcom_smd.ko There is already a dependency that is meant to avoid the broken configuration, but that only prevents the case where at least one of the two are built-in, but not if both are modules. This changes the dependency to "=n", to ensure that the new driver can only be enabled if the other one is completely disabled. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Fixes: 53e2822e56c7 ("rpmsg: Introduce Qualcomm SMD backend") Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2016-09-08rpmsg: Introduce Qualcomm SMD backendBjorn Andersson3-0/+1445
This introduces a new rpmsg backend for the Qualcomm SMD system, allowing communication with various remote processors found in Qualcomm platforms. The implementation is based on, and intends to replace, drivers/soc/qcom/smd.c with the necessary adaptions for fitting with the rpmsg core. Based on original work by Sricharan R <sricharan@codeaurora.org> Cc: Sricharan R <sricharan@codeaurora.org> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2016-09-08rpmsg: Allow callback to return errorsBjorn Andersson1-4/+6
Some rpmsg backends support holding on to and redelivering messages upon failed handling of them, so provide a way for the callback to report and error and allow the backends to handle this. Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2016-09-08rpmsg: Move virtio specifics from public headerBjorn Andersson1-0/+52
Move virtio rpmsg implementation details from the public header file to the virtio rpmsg implementation. Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2016-09-08rpmsg: virtio: Hide vrp pointer from the public APIBjorn Andersson1-8/+35
Create a container struct virtio_rpmsg_channel around the rpmsg_channel to keep virtio backend information separate from the rpmsg and public API. This makes the public structures independant of virtio. Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2016-09-08rpmsg: Hide rpmsg indirection tablesBjorn Andersson2-0/+50
Move the device and endpoint indirection tables to the rpmsg internal header file, to hide them from the public API. Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2016-09-08rpmsg: Split rpmsg core and virtio backendBjorn Andersson3-223/+237
Extract the generic rpmsg core functionality from the virtio rpmsg implementation, splitting the implementation in a rpmsg core and a virtio backend. Based on initial work by Sricharan R <sricharan@codeaurora.org> Cc: Sricharan R <sricharan@codeaurora.org> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2016-09-08rpmsg: Split off generic tail of create_channel()Bjorn Andersson1-3/+15
The tail of create_channel() is common among all rpmsg backends, so split it off from the virtio specific part to allow it to be extracted to the rpmsg core. Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2016-09-08rpmsg: Move helper for finding rpmsg devices to coreBjorn Andersson3-25/+68
Extract and move the helper function for finding rpmsg child devices to the core. Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2016-09-08rpmsg: Move endpoint related interface to rpmsg coreBjorn Andersson2-13/+160
Move the rpmsg_send() and rpmsg_destroy_ept() interface to the rpmsg core, so that we eventually can hide the rpmsg_endpoint ops from the public API. Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2016-09-08rpmsg: Indirection table for rpmsg_endpoint operationsBjorn Andersson1-3/+82
Add indirection table for rpmsg_endpoint related operations and move virtio implementation behind this, this finishes of the decoupling of the virtio implementation from the public API. Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2016-09-08rpmsg: Move rpmsg_device API to new fileBjorn Andersson4-49/+77
Extract the now indirect rpmsg_create_ept() interface to a separate file and start building up a rpmsg core. Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2016-09-08rpmsg: Introduce indirection table for rpmsg_device operationsBjorn Andersson1-6/+42
To allow for multiple backend implementations add an indireection table for rpmsg_device related operations and move the virtio implementation behind this table. Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2016-09-08rpmsg: Clean up rpmsg device vs channel namingBjorn Andersson1-21/+21
The rpmsg device representing struct is called rpmsg_channel and the variable name used throughout is rpdev, with the communication happening on endpoints it's clearer to just call this a "device" in a public API. Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2016-09-08rpmsg: Make rpmsg_create_ept() take channel_info structBjorn Andersson1-16/+10
As we introduce support for additional rpmsg backends, some of these only supports point-to-point "links" represented by a name. By making rpmsg_create_ept() take a channel_info struct we allow for these backends to either be passed a source address, a destination address or a name identifier. Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2016-09-08rpmsg: rpmsg_send() operations takes rpmsg_endpointBjorn Andersson1-3/+3
The rpmsg_send() operations has been taking a rpmsg_device, but this forces users of secondary rpmsg_endpoints to use the rpmsg_sendto() interface - by extracting source and destination from the given data structures. If we instead pass the rpmsg_endpoint to these functions a service can use rpmsg_sendto() to respond to messages, even on secondary endpoints. In addition this would allow us to support operations on multiple channels in future backends that does not support off-channel operations. Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2016-09-08rpmsg: Name rpmsg devices based on channel idBjorn Andersson1-10/+2
By basing rpmsg device names on channel id we end up with human readable device names in sysfs and debug logs. Reviewed-by: Sarangdhar Joshi <spjoshi@codeaurora.org> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2016-09-08rpmsg: Enable matching devices with drivers based on DTBjorn Andersson1-4/+6
Make it possible to match rpmsg devices based on device tree node, in addition to the id table. In some of these cases the rpmsg driver would not have a id_table, so make this optional. Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2016-08-12rpmsg: use dynamic_hex_dump for hex dump tracesAnna, Suman1-6/+12
There are couple of print_hex_dump traces used in rpmsg code which prints the actual byte messages being transferred between host and the remote processors. These traces are quiet verbose and affects performance, if the appropriate trace level is enabled. These hex dumps are needed rather rarely, but are quite useful when debugging complex IPC corner cases. So, this patch switches these hex dump traces to use the dynamic_hex_dump() API. The hex dump traces are also enabled only when CONFIG_DYNAMIC_DEBUG is enabled. This switch allows flexibility of controlling these traces through dynamic debug, instead of removing them completely. Signed-off-by: Suman Anna <s-anna@ti.com> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2016-08-12rpmsg: align code with open parenthesisAnna, Suman1-21/+19
This patch fixes most of the existing alignment checkpatch check warnings of the type "Alignment should match open parenthesis" in the virtio rpmsg bus code. A couple of them have been left as is to not exceed the 80-char limit. Signed-off-by: Suman Anna <s-anna@ti.com> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2016-08-12rpmsg: use proper format-specifier for printing dma_addr_tAnna, Suman1-2/+2
The dma_addr_t types can be printed properly using the %pad printk format-specifier, there is no need to resort to the unsigned long long type-casting to deal with different possible type sizes. Signed-off-by: Suman Anna <s-anna@ti.com> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2016-08-12rpmsg: remove pointless OOM printsAnna, Suman1-7/+3
These types of error prints are superfluous. The system will pick up on OOM issues and let the user know. While at this, fix the usage of using a structure instead of the actual variable in one of the allocations. Signed-off-by: Suman Anna <s-anna@ti.com> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2016-08-12rpmsg: virtio_rpmsg_bus: Fix randomly placed semi-colonLee Jones1-1/+1
It should never have been there in the first place. Signed-off-by: Lee Jones <lee.jones@linaro.org> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2016-08-10rpmsg: remove unneeded conversions to boolAndrew F. Davis1-1/+1
Found with scripts/coccinelle/misc/boolconv.cocci. Signed-off-by: Andrew F. Davis <afd@ti.com> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2016-05-06rpmsg: add THIS_MODULE to rpmsg_driver in rpmsg coreAndrew F. Davis1-3/+5
Add register_rpmsg_driver helper macro that adds THIS_MODULE to rpmsg_driver for the registering driver. We rename and modify the existing register_rpmsg_driver to enable this. Signed-off-by: Andrew F. Davis <afd@ti.com> Acked-by: Suman Anna <s-anna@ti.com> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2016-01-12virtio: make find_vqs() checkpatch.pl-friendlyStefan Hajnoczi1-1/+1
checkpatch.pl wants arrays of strings declared as follows: static const char * const names[] = { "vq-1", "vq-2", "vq-3" }; Currently the find_vqs() function takes a const char *names[] argument so passing checkpatch.pl's const char * const names[] results in a compiler error due to losing the second const. This patch adjusts the find_vqs() prototype and updates all virtio transports. This makes it possible for virtio_balloon.c, virtio_input.c, virtgpu_kms.c, and virtio_rpmsg_bus.c to use the checkpatch.pl-friendly type. Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Acked-by: Bjorn Andersson <bjorn.andersson@sonymobile.com>
2015-03-13virtio_rpmsg: set DRIVER_OK before using deviceMichael S. Tsirkin1-1/+16
virtio spec requires that all drivers set DRIVER_OK before using devices. While rpmsg isn't yet included in the virtio 1 spec, previous spec versions also required this. virtio rpmsg violates this rule: is calls kick before setting DRIVER_OK. The fix isn't trivial since simply calling virtio_device_ready earlier would mean we might get an interrupt in parallel with adding buffers. Instead, split kick out to prepare+notify calls. prepare before virtio_device_ready - when we know we won't get interrupts. notify right afterwards. Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Acked-by: Ohad Ben-Cohen <ohad@wizery.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
2014-11-26rpmsg: use less buffers when vrings are smallSuman Anna1-14/+30
Adjust the number of rpmsg buffers to rely on the size of the vring, instead of using the hard coded value of 512 (256 per direction). This is needed when small vrings are being used, where 256 buffers are too much to fit in a vring. While considering the vring size, keep using the 512 hard coded value as an upper limit to avoid wacky resource tables consuming unreasonable amount of memory. NOTE: The number of buffers is already assumed to be symmetrical in each direction, and that logic is unchanged. Signed-off-by: Suman Anna <s-anna@ti.com> [edit commit message, small code and comment simplification] Signed-off-by: Ohad Ben-Cohen <ohad@wizery.com>
2013-05-07Merge tag 'rpmsg-3.10' of ↵Linus Torvalds2-14/+36
git://git.kernel.org/pub/scm/linux/kernel/git/ohad/rpmsg Pull rpmsg changes from Ohad Ben-Cohen: "A small pull request consisting of: - Make rpmsg process all pending messages instead of just one, from Robert Tivy - Fix Kconfig dependency on VIRTUALIZATION, from Suman. Note: this was submitted late during the 3.9 rc cycle and it seemed appropriate to wait with it for the merge window. - Belated addition of an rpmsg entry to the MAINTAINERS file. People seem to look for this" * tag 'rpmsg-3.10' of git://git.kernel.org/pub/scm/linux/kernel/git/ohad/rpmsg: rpmsg: fix kconfig dependencies for VIRTIO MAINTAINERS: add rpmsg entry rpmsg: process _all_ pending messages in rpmsg_recv_done
2013-05-02Merge tag 'virtio-next-for-linus' of ↵Linus Torvalds1-4/+4
git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux Pull virtio & lguest updates from Rusty Russell: "Lots of virtio work which wasn't quite ready for last merge window. Plus I dived into lguest again, reworking the pagetable code so we can move the switcher page: our fixmaps sometimes take more than 2MB now..." Ugh. Annoying conflicts with the tcm_vhost -> vhost_scsi rename. Hopefully correctly resolved. * tag 'virtio-next-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux: (57 commits) caif_virtio: Remove bouncing email addresses lguest: improve code readability in lg_cpu_start. virtio-net: fill only rx queues which are being used lguest: map Switcher below fixmap. lguest: cache last cpu we ran on. lguest: map Switcher text whenever we allocate a new pagetable. lguest: don't share Switcher PTE pages between guests. lguest: expost switcher_pages array (as lg_switcher_pages). lguest: extract shadow PTE walking / allocating. lguest: make check_gpte et. al return bool. lguest: assume Switcher text is a single page. lguest: rename switcher_page to switcher_pages. lguest: remove RESERVE_MEM constant. lguest: check vaddr not pgd for Switcher protection. lguest: prepare to make SWITCHER_ADDR a variable. virtio: console: replace EMFILE with EBUSY for already-open port virtio-scsi: reset virtqueue affinity when doing cpu hotplug virtio-scsi: introduce multiqueue support virtio-scsi: push vq lock/unlock into virtscsi_vq_done virtio-scsi: pass struct virtio_scsi to virtqueue completion function ...
2013-04-29drivers/rpmsg/virtio_rpmsg_bus.c: fix error return code in rpmsg_probe()Wei Yongjun1-1/+3
Return a negative error code from the error handling case instead of 0, as returned elsewhere in this function. Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn> Cc: Ohad Ben-Cohen <ohad@wizery.com> Cc: Tejun Heo <tj@kernel.org> Cc: Stephen Boyd <sboyd@codeaurora.org> Cc: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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