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2013-01-17Drivers: hv: Capture the host build informationK. Y. Srinivasan2-0/+16
Capture the host build information so it can be presented along with the negotiated vmbus version information. Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Reviewed-by: Haiyang Zhang <haiyangz@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-01-17Drivers: hv: Implement flow management on the send sideK. Y. Srinivasan3-4/+61
Implement flow management on the send side. When the sender is blocked, the reader can potentially signal the sender to indicate there is now room to send. Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Reviewed-by: Haiyang Zhang <haiyangz@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-01-17Drivers: hv: Enable protocol negotiation with win8 hostsK. Y. Srinivasan2-1/+2
Now that we have implemented all of the Win8 (WS2012) functionality, negotiate Win8 protocol with the host. Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Reviewed-by: Haiyang Zhang <haiyangz@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-01-17Drivers: hv: Add a check to deal with spurious interruptsK. Y. Srinivasan1-4/+6
We establish the handler before we have fully initialized the VMBUS state. Deal with spurious interrupts. Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Reviewed-by: Haiyang Zhang <haiyangz@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-01-17Drivers: hv: Handle vmbus interrupts concurrently on all cpusK. Y. Srinivasan2-1/+22
Vmbus interrupts are unique in that while the interrupt is delivered on a given vector, these can be handled concurrently on different CPUs. Handle the vmbus interrupts concurrently on all the CPUs. Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Reviewed-by: Haiyang Zhang <haiyangz@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-01-17Drivers: hv: Manage event tasklets on per-cpu basisK. Y. Srinivasan3-3/+19
Now that we can potentially take vmbus interrupts on any CPU, make the tasklets per-CPU. Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Reviewed-by: Haiyang Zhang <haiyangz@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-01-17Drivers: hv: Get rid of unnecessary request for offersK. Y. Srinivasan1-2/+0
This call to seek offers is not necessary and just adds unnecessary delay. Get rid of it. Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Reviewed-by: Haiyang Zhang <haiyangz@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-01-17Drivers: hv: Get rid of the unused global signaling stateK. Y. Srinivasan2-32/+0
Now that we have implemented a per-connection signaling mechanism, get rid of the global signaling state. For hosts that don't support per-connection signaling handle, we have moved the global state to be a per-channel state. Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Reviewed-by: Haiyang Zhang <haiyangz@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-01-17Drivers: hv: Add code to distribute channel interrupt loadK. Y. Srinivasan1-1/+84
Implement a simple policy for distributing incoming interrupt load. We classify channels as (a) performance critical and (b) not performance critical. All non-performance critical channels will be bound to the boot cpu. Performance critical channels will be bound to the remaining available CPUs on a round-robin basis. Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Reviewed-by: Haiyang Zhang <haiyangz@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-01-17Drivers: hv: Modify the interrupt handling code to support win8 and beyondK. Y. Srinivasan2-7/+46
Starting with Win8 (WS2012), the event page can be used to directly get the channel ID that needs servicing. Modify the channel event handling code to take advantage of this feature. Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Reviewed-by: Haiyang Zhang <haiyangz@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-01-17Drivers: hv: Add state to manage incoming channel interrupt loadK. Y. Srinivasan3-3/+22
Add state to bind a channel to a specific VCPU. This will help us better distribute incoming interrupt load. Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Reviewed-by: Haiyang Zhang <haiyangz@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-01-17Drivers: hv: Setup a mapping for Hyper-V's notion cpu IDK. Y. Srinivasan2-0/+21
On win8 (ws2012), incoming vmbus interrupt load can be spread across all available VCPUs in the guest. On a per-channel basis, the interrupts can be bound to specific CPUs. The Linux notion of cpu ID may be different from that of the hypervisor's. Setup a mapping structure. Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Reviewed-by: Haiyang Zhang <haiyangz@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-01-17Drivers: hv: Cleanup vmbus_set_event() to support win7 and beyondK. Y. Srinivasan1-5/+8
On win7 (ws2008 R2) and beyond, we have the notion of having dedicated interrupts on a per-channel basis. When a channel has a dedicated interrupt assigned, there is no need to set the interrupt bit in the shared page. Implement this optimization. Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Reviewed-by: Haiyang Zhang <haiyangz@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-01-17Drivers: hv: Manage signaling state on a per-connection basisK. Y. Srinivasan3-21/+45
The current code has a global handle for supporting signaling of the host from guest. Make this a per-channel attribute as on some versions of the host we can signal on per-channel handle. Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Reviewed-by: Haiyang Zhang <haiyangz@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-01-17Drivers: hv: Move vmbus version definitions to hyperv.hK. Y. Srinivasan2-15/+15
To support version specific optimization in various vmbus drivers, move the vmbus definitions to the public header file. Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Reviewed-by: Haiyang Zhang <haiyangz@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-01-17Drivers: hv: Change the signature of vmbus_set_event()K. Y. Srinivasan3-3/+4
In preparation for supporting a per-connection signaling mechanism, change the signature of vmbus_set_event(). This change is also needed to implement other aspects of the signaling optimization. Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Reviewed-by: Haiyang Zhang <haiyangz@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-01-17Drivers: hv: Change the signature for hv_signal_event()K. Y. Srinivasan3-6/+5
In preparation for implementing a per-connection signaling framework, change the signature of the function hv_signal_event(). The current code uses a global handle for signaling the host. Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Reviewed-by: Haiyang Zhang <haiyangz@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-01-17Drivers: hv: Save and export negotiated vmbus versionK. Y. Srinivasan2-0/+15
Export the negotiated vmbus version as this may be useful for individual drivers. Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Reviewed-by: Haiyang Zhang <haiyangz@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-01-17Drivers: hv: Extend/modify vmbus_channel_offer_channel for win7 and beyondK. Y. Srinivasan1-5/+31
The "offfer" message sent by the host has been extended in win7 (ws2008 R2). Add/modify state to reflect this extension. All these changes are backward compatible. Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Reviewed-by: Haiyang Zhang <haiyangz@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-01-17Drivers: hv: Update the ring buffer structure to match win8 functionalityK. Y. Srinivasan1-7/+21
Update the ringbuffer structure to support win8 functionality. Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Reviewed-by: Haiyang Zhang <haiyangz@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-01-17Drivers: hv: Support handling multiple VMBUS versionsK. Y. Srinivasan2-60/+111
The current code hard coded the vmbus version independent of the host it was running on. Add code to dynamically negotiate the most appropriate version. Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Reviewed-by: Haiyang Zhang <haiyangz@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-01-17Drivers: hv: Get rid of hv_get_ringbuffer_interrupt_mask()K. Y. Srinivasan2-14/+0
This function is no longer used; get rid of it. Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Reviewed-by: Haiyang Zhang <haiyangz@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-01-17Drivers: hv: Optimize the signaling on the write pathK. Y. Srinivasan3-10/+49
The host has already implemented the "read" side optimizations. Leverage that to optimize "write" side signaling. Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Reviewed-by: Haiyang Zhang <haiyangz@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-01-17Drivers: hv: Optimize signaling in the read pathK. Y. Srinivasan1-3/+25
Now that we have the infratructure for correctly determining when we should signal the host; optimize the signaling on the read side - signaling the guest from the host. Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Reviewed-by: Haiyang Zhang <haiyangz@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-01-17Drivers: hv: Turn off batched reading for util driversK. Y. Srinivasan1-0/+10
Util driver is not a performance critical driver and furthermore some util services such as KVP can only handle one outstanding message from the host. Turn off batched reading for util drivers. Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Reviewed-by: Haiyang Zhang <haiyangz@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-01-17Drivers: hv: Add state to manage batched readingK. Y. Srinivasan2-0/+27
For the "read" side signaling optimization, the reader has to completely drain the queue before exiting. Add state to manage this "batched" reading. Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Reviewed-by: Haiyang Zhang <haiyangz@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-01-17Drivers: hv: Implement routines for read side signaling optimizationK. Y. Srinivasan2-0/+28
Implement functions that will support read-side signaling optimization. By having the reader indicate the start of the "read" operation and the "end" of the read operation we can more efficiently handle the signaling protocol: while the read is in progress, there is no need for the "writer" to signal the "reader" as new items are put on the read queue. Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Reviewed-by: Haiyang Zhang <haiyangz@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-01-17tools/hv: Fix permissions of created directory and filesBen Hutchings1-2/+2
It's silly to create directories without execute permission, or to give permissions to 'other' but not the group-owner. Write the permissions in octal and 'ls -l' format since these are much easier to read than the named macros. Signed-off-by: Ben Hutchings <ben@decadent.org.uk> Signed-off-by: Tomas Hozza <thozza@redhat.com> Acked-by: K. Y. Srinivasan <kys@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-01-17tools/hv: Fix /var subdirectoryTomas Hozza1-6/+6
Initial patch by Ben Hutchings <ben@decadent.org.uk> We will install this in /usr, so it must use /var/lib for its state. Only programs installed under /opt should use /var/opt. Signed-off-by: Tomas Hozza <thozza@redhat.com> Acked-by: K. Y. Srinivasan <kys@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-01-17hv: hv_balloon: remove duplicated include from hv_balloon.cWei Yongjun1-1/+0
Remove duplicated include. Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn> Acked-by: K. Y. Srinivasan <kys@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-01-17misc: lattice-ecp3-config.c: remove __dev* markingsGreg Kroah-Hartman1-4/+4
These are now removed from the kernel, so remove them to allow the driver to build properly. Cc: Stefan Roese <sr@denx.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-01-17misc: Add Lattice ECP3 FPGA configuration via SPIStefan Roese3-0/+255
This patch adds support for bitstream configuration (programming / loading) of the Lattice ECP3 FPGA's via the SPI bus. Here an example on my custom MPC5200 based board: $ echo 1 > /sys/class/firmware/spi0.0/loading $ cat fpga_a4m2k.bit > /sys/class/firmware/spi0.0/data $ echo 0 > /sys/class/firmware/spi0.0/loading leads to these messages: lattice-ecp3 spi0.0: FPGA Lattice ECP3-35 detected lattice-ecp3 spi0.0: Configuring the FPGA... lattice-ecp3 spi0.0: FPGA succesfully configured! Signed-off-by: Stefan Roese <sr@denx.de> Acked-by: Ming Lei <ming.lei@canonical.com> Reviewed-by: Grant Likely <grant.likely@secretlab.ca> Cc: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-01-17uio-howto: example bugStephen Hemminger1-1/+1
Bug in demo program, checking wrong return value Signed-off-by: Stephen Hemminger <stephen@networkplumber.org> Cc: "Hans J. Koch" <hjk@hansjkoch.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-01-17misc: st_core: Error triggered by convert "char" to "int"channing1-1/+2
When st driver decodes protocol index received from raw data, it does a value convert from "char" to "int". Because it's sign extension from bit8 to bit32, the "int" value maybe minus, in another word, the protocol index might be minus, but driver doesn't filter such case and may continue access memory pointed by this minus index. This patch is to change the variable type of index from "int" to "unsigned char", so that it avoids do such kind of type conversion. cc: liu chuansheng <chuansheng.liu@intel.com> Signed-off-by: channing <chao.bi@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-01-15w1_therm: Retries: remove old code add CRCDavid Stevenson1-19/+6
w1_therm includes some obsolete code to detect bad_roms, this is no longer relevant. The retry code is only used for this bad_rom test, however there is a CRC check that detects a bad read, but does not trigger a retry. This patch removes all the bad_rom code and uses the CRC check to trigger retries. Signed-off-by: David Stevenson <david@avoncliff.com> Acked-by: Evgeniy Polyakov <zbr@ioremap.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-01-15drivers/w1/masters/mxc_w1.c: use devm_ functionsJulia Lawall1-39/+10
The various devm_ functions allocate memory that is released when a driver detaches. This patch uses these functions for data that is allocated in the probe function of a platform device and is only freed in the remove function. At the same time, this fixes two faults. First, mdev, the result of kzalloc, was never freed. Second, on failure of ioremap, 0 was returned. This has been replaced by -EBUSY, which was the failure value for the call to request_mem_region, with which the call to ioremap has been combined. The warning message on failure of ioremap is dropped, because devm_request_and_ioremap already gives such messages on failure. Finally, the initial call to platform_get_resource is moved closer to the call to devm_request_and_ioremap, which takes care of checking whether its result is NULL, implying that a test on the result of this call to platform_get_resource is not needed. Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr> Acked-by: Evgeniy Polyakov <zbr@ioremap.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-01-15drivers/w1/masters/ds1wm.c: use devm_ functionsJulia Lawall1-34/+18
The various devm_ functions allocate memory that is released when a driver detaches. This patch uses these functions for data that is allocated in the probe function of a platform device and is only freed in the remove function. Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr> Acked-by: Evgeniy Polyakov <zbr@ioremap.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-01-15Merge tag 'extcon-for-3.9' of ↵Greg Kroah-Hartman1414-8135/+9434
git://git.kernel.org/pub/scm/linux/kernel/git/chanwoo/extcon into char-misc-next Chanwoo writes: This is patch set of extcon for v3.9. Update to max77693/max8997 extcon driver: - Using MHL_TA cable for charging. - Support JIG cable. - Support Dock-Audio device for playing music and button of device. - Support Dock-Smart device for desktop mode with mouse/keyboard. - Set default UART/USB path on probe(). - Check the state/type of cable after completing initialization. - Code clean to remove duplicate code and bug fix related to sequence of interrupt. - Fix irq_flag of max8997/max77693 driver. Update to arizona extcon driver: - Headphone measurements. - Alternative detection mechanism for non-default system designs. - Microphone clamp integration. - Support for additional detection pin. - MICBIAS rise time configuration.
2013-01-15ipack/devices/ipoctal: added shutdown callbackSamuel Iglesias Gonsalvez1-0/+17
Added shutdown callback to disable RX and TX when there is no other client accesing the device. Signed-off-by: Samuel Iglesias Gonsalvez <siglesias@igalia.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-01-15ipack/devices/ipoctal: add rx_enable flagSamuel Iglesias Gonsalvez1-2/+8
Thus, we don't enable RX when a termios setup has been called, as it could be disabled previously. As the control registers (Rx, Tx flags specifically) cannot be read from the device, we keep this info in rx_enable. Signed-off-by: Samuel Iglesias Gonsalvez <siglesias@igalia.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-01-15ipack/devices/ipoctal: remove redundant tty_flip_buffer_push()Samuel Iglesias Gonsalvez1-1/+0
The function is already called in ipoctal_irq_rx() Signed-off-by: Samuel Iglesias Gonsalvez <siglesias@igalia.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-01-15ipack/devices/ipoctal: protect the channel data processing with a spinlockSamuel Iglesias Gonsalvez1-0/+3
We protect important data such as TX buffer pointer, nb_bytes counter and status registers of the device, from accessing several times at the same time. Signed-off-by: Samuel Iglesias Gonsalvez <siglesias@igalia.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-01-15ipack/devices/ipoctal: ack IRQ before processing itSamuel Iglesias Gonsalvez1-4/+4
Due to the IRQ processing, we can generate another IRQ that can come before we end the previous one, so we lost it. E.g. when transmitting a character. To allow the processing in SMP machines, we ack the IRQ at the beginning of the IRQ handler. Signed-off-by: Samuel Iglesias Gonsalvez <siglesias@igalia.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-01-15ipack/devices/ipoctal: avoid re-enable RX two times.Samuel Iglesias Gonsalvez1-6/+4
RX is enabled when the tty port is open, so no need to do it in initialization time: it can allow the device to receive characters but no TTY client is listening to them. It produced an infinite number of IRQ as RxFIFO is not read to clear that IRQ in the device, so it is still pending. Signed-off-by: Samuel Iglesias Gonsalvez <siglesias@igalia.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-01-15ipack/devices/ipoctal: rework disable TX when the TX buffer is emptySamuel Iglesias Gonsalvez1-11/+7
Depending of the device, it disables the TX mode in different places when there is no more data to transmit. This patch reorder them and disable the TX mode in the same place. Signed-off-by: Samuel Iglesias Gonsalvez <siglesias@igalia.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-01-15ipack/devices/ipoctal: setup TTY_NORMAL flag for each character.Samuel Iglesias Gonsalvez1-1/+2
In case of several characters present in RxFIFO, they will have the flag of the previous one, no matter if the actual character was received properly or not. This patch fixes this bug. Signed-off-by: Samuel Iglesias Gonsalvez <siglesias@igalia.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-01-15ipack/devices/ipoctal: remove wait_queue and atomic_t board_writeSamuel Iglesias Gonsalvez1-16/+3
Don't block the TTY client when sending characters. Signed-off-by: Samuel Iglesias Gonsalvez <siglesias@igalia.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-01-15ipack/devices/ipoctal: fix kernel bug when using pppdSamuel Iglesias Gonsalvez1-19/+2
Trying to setup the pppd server to use ipoctal's serial ports, it says the ports are busy the first time. If the operation is repeated, a kernel bug due to a dereference of a NULL pointer appears. Removing the one-access-only setup from the driver, removes this kernel bug. Signed-off-by: Samuel Iglesias Gonsalvez <siglesias@igalia.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-01-15ipack/devices/ipoctal: don't check if nb_bytes is < 0Alberto Garcia1-3/+1
It is an unsigned int so that check is pointless. Signed-off-by: Alberto Garcia <agarcia@igalia.com> Signed-off-by: Samuel Iglesias Gonsalvez <siglesias@igalia.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-01-15ipack/devices/ipoctal: Fix race condition during TxAlberto Garcia1-7/+4
In order to transmit data, the driver enables Tx and sleeps until *board_write is set to 1 by the interrupt handler. It can happen, though, that the data is sent even before the process is asleep. In this case *board_write must be set to 1 anyway, otherwise we will be waiting for a condition that will never be true. Signed-off-by: Alberto Garcia <agarcia@igalia.com> Signed-off-by: Samuel Iglesias Gonsalvez <siglesias@igalia.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>