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* parport: fix a trivial typoGeliang Tang2016-01-041-1/+1
| | | | | | | | s/regsiter/register/ Signed-off-by: Geliang Tang <geliangtang@163.com> Signed-off-by: Sudip Mukherjee <sudip@vectorindia.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* Merge tag 'extcon-next-for-4.5' of ↵Greg Kroah-Hartman2015-12-2710-8/+310
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/chanwoo/extcon into char-misc-next Chanwoo writes: Update extcon for 4.5 Detailed description for patchset: 1. Add new MAX3355 extcon driver - Maxim Integrated MAX3355E chip integrates a charge pump and comparator to enable a system with an integrated USB OTG dual-role transceiver to function as an USB OTG dual-role device. 2. Update the extcon-arizona driver for jack detection - Add the device binding for the jack detection and add the documentation of extcon-arizona.c. 3. Fix the minor issue of extcon driver - Add IRQF_ONESHOT to interrupt flags of extcon-rt8973. - Fix the return value regmap_irq_get_virq() of extcon-max(14577|77693|77843).c driver by using script[1]. [1] http://permalink.gmane.org/gmane.linux.kernel/2046107
| * extcon: add Maxim MAX3355 driverSergei Shtylyov2015-12-214-0/+177
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Maxim Integrated MAX3355E chip integrates a charge pump and comparators to enable a system with an integrated USB OTG dual-role transceiver to function as an USB OTG dual-role device. In addition to sensing/controlling Vbus, the chip also passes thru the ID signal from the USB OTG connector. On some Renesas boards, this signal is just fed into the SoC thru a GPIO pin -- there's no real OTG controller, only host and gadget USB controllers sharing the same USB bus; however, we'd like to allow host or gadget drivers to be loaded depending on the cable type, hence the need for the MAX3355 extcon driver. The Vbus status signals are also wired to GPIOs (however, we aren't currently interested in them), the OFFVBUS# signal is controlled by the host controllers, there's also the SHDN# signal wired to a GPIO, it should be driven high for the normal operation. Signed-off-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com> Acked-by: Chanwoo Choi <cw00.choi@samsung.com> Acked-by: Rob Herring <robh@kernel.org> [cw00.choi: Add the GPIOLIB dependency] Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
| * extcon: max77843: fix handling return value of regmap_irq_get_virqAndrzej Hajda2015-12-151-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | The function can return negative values, so its result should be assigned to signed variable. The problem has been detected using proposed semantic patch scripts/coccinelle/tests/assign_signed_to_unsigned.cocci [1]. [1]: http://permalink.gmane.org/gmane.linux.kernel/2046107 Signed-off-by: Andrzej Hajda <a.hajda@samsung.com> Reviewed-by: Krzysztof Kozlowski <k.kozlowski@samsung.com> Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
| * extcon: max77693: fix handling return value of regmap_irq_get_virqAndrzej Hajda2015-12-151-2/+2
| | | | | | | | | | | | | | | | | | | | The function can return negative values, so its result should be assigned to signed variable. Signed-off-by: Andrzej Hajda <a.hajda@samsung.com> Suggested-by: Krzysztof Kozlowski <k.kozlowski@samsung.com> Reviewed-by: Krzysztof Kozlowski <k.kozlowski@samsung.com> Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
| * extcon: max14577: fix handling return value of regmap_irq_get_virqAndrzej Hajda2015-12-151-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | The function can return negative values, so its result should be assigned to signed variable. The problem has been detected using proposed semantic patch scripts/coccinelle/tests/assign_signed_to_unsigned.cocci [1]. [1]: http://permalink.gmane.org/gmane.linux.kernel/2046107 Signed-off-by: Andrzej Hajda <a.hajda@samsung.com> Reviewed-by: Krzysztof Kozlowski <k.kozlowski@samsung.com> Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
| * extcon: arizona: Add DT binding examplesCharles Keepax2015-12-151-0/+26
| | | | | | | | | | | | | | | | Add an example for all elements of the Arizona extcon device tree binding. Signed-off-by: Charles Keepax <ckeepax@opensource.wolfsonmicro.com> Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
| * extcon: arizona: Update device tree binding for mic detect configurationsCharles Keepax2015-12-151-0/+8
| | | | | | | | | | | | | | | | | | | | Update the device tree binding documentation to include documentation for the wlf,micd-configs property that is used to specify the configurations for headset polarity detection (CTIA / OTMP). Signed-off-by: Charles Keepax <ckeepax@opensource.wolfsonmicro.com> Acked-by: Rob Herring <robh@kernel.org> Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
| * extcon: arizona: Add device bindings for the micd configurationsCharles Keepax2015-12-151-2/+54
| | | | | | | | | | | | | | | | | | | | | | Add device bindings to support configuring the jack detection configurations. Each configuration needs to specify the connection of the mic det pins, which micbias should be used and the value of the micd polarity GPIO required to activate that configuration. Signed-off-by: Charles Keepax <ckeepax@opensource.wolfsonmicro.com> Acked-by: Chanwoo Choi <cw00.choi@samsung.com> Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
| * extcon: rt8973: Add IRQF_ONESHOT to interrupt flagsSaurabh Sengar2015-11-271-1/+1
| | | | | | | | | | | | | | | | This patch adds IRQF_ONESHOT if no primary handler is provided for request threaded irq. Signed-off-by: Saurabh Sengar <saurabh.truth@gmail.com> Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
| * extcon: arizona: Update naming for micd-timeout DT to include unitsCharles Keepax2015-11-242-2/+2
| | | | | | | | | | | | | | Add time units of -ms (milliseconds) to wlf,micd-timeout. Signed-off-by: Charles Keepax <ckeepax@opensource.wolfsonmicro.com> Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
| * extcon: arizona: Update naming for second jack detection DT bindingCharles Keepax2015-11-242-4/+4
| | | | | | | | | | | | | | | | | | Update the name for the second jack detection pin binding to be a little less confusing. Signed-off-by: Charles Keepax <ckeepax@opensource.wolfsonmicro.com> Acked-by: Rob Herring <robh@kernel.org> Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
| * extcon: arizona: Update DT binding documentation for jack detectionCharles Keepax2015-11-201-0/+6
| | | | | | | | | | | | | | | | | | | | | | Add additional bindings for both inverting the polarity of the jack detection pins and allowing the use of a second jack detection pin. Note that the second jack detection pin is hard wired in the chip so can only be enabled through the binding, rather than a pin being specified. Signed-off-by: Charles Keepax <ckeepax@opensource.wolfsonmicro.com> Reviewed-by: Chanwoo Choi <cw00.choi@samsung.com> Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
| * extcon: arizona: Update DT binding documentation for mic detectionCharles Keepax2015-11-201-0/+20
| | | | | | | | | | | | | | | | Add additional bindings to allow configuration of the system specific microphone detection settings. Signed-off-by: Charles Keepax <ckeepax@opensource.wolfsonmicro.com> Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
| * extcon: arizona: Add device binding for second jack detect pin on GPIO5Charles Keepax2015-11-201-0/+5
| | | | | | | | | | | | | | | | | | | | | | | | Some Arizona devices have the option to use the GPIO5 pin as a second jack detection pin. This patch adds device bindings to specify to the driver that it should use this pin. Note that the second jack detection pin is hard wired in the chip so can only be enabled through the binding, rather than a pin being specified. Signed-off-by: Charles Keepax <ckeepax@opensource.wolfsonmicro.com> Acked-by: Chanwoo Choi <cw00.choi@samsung.com> Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
| * extcon: arizona: Add device binding for jack detect polarity inversionCharles Keepax2015-11-201-0/+3
| | | | | | | | | | | | | | | | | | | | | | By default the driver expects the jackdet pin to be pulled low when a jack is inserted. This patch adds a device binding that allows the user to specify that the jackdet pin will be pulled high when a jack is inserted. Signed-off-by: Charles Keepax <ckeepax@opensource.wolfsonmicro.com> Acked-by: Chanwoo Choi <cw00.choi@samsung.com> Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
| * extcon: arizona: Add device binding for the general purpose switchCharles Keepax2015-11-201-0/+2
| | | | | | | | | | | | | | | | | | | | | | The switch is generally used in conjunction with the MICDET clamp to suppress pops and clicks associated with jack insertion. This patch adds a binding that allows the user to select the mode of operation for this switch. Signed-off-by: Charles Keepax <ckeepax@opensource.wolfsonmicro.com> Acked-by: Chanwoo Choi <cw00.choi@samsung.com> Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
| * extcon: arizona: Add device binding to enable ADC mode micdetCharles Keepax2015-11-201-0/+3
| | | | | | | | | | | | | | | | | | Add a simple boolean binding to turn on and off the use of ADC microphone detection mode to determine 3/4 pole jack. Signed-off-by: Charles Keepax <ckeepax@opensource.wolfsonmicro.com> Acked-by: Chanwoo Choi <cw00.choi@samsung.com> Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
* | coresight: Fix a typo in KconfigAndrew F. Davis2015-12-211-1/+1
| | | | | | | | | | | | Signed-off-by: Andrew F. Davis <afd@ti.com> Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* | coresight: checking for NULL string in coresight_name_match()Mathieu Poirier2015-12-211-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Connection child names associated to ports can sometimes be NULL, which is the case when booting a system on QEMU or when the Coresight power domain isn't switched on. This patch is adding a check to make sure a NULL string isn't fed to strcmp(), something that avoid crashing the system. Cc: <stable@vger.kernel.org> # v3.18+ Reported-by: Tyler Baker <tyler.baker@linaro.org> Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* | Drivers: hv: vmbus: Treat Fibre Channel devices as performance criticalK. Y. Srinivasan2015-12-211-0/+3
| | | | | | | | | | | | | | | | | | | | For performance critical devices, we distribute the incoming channel interrupt load across available CPUs in the guest. Include Fibre channel devices in the set of devices for which we would distribute the interrupt load. Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* | Drivers: hv: utils: fix hvt_op_poll() return value on transport destroyVitaly Kuznetsov2015-12-211-1/+1
| | | | | | | | | | | | | | | | | | | | The return type of hvt_op_poll() is unsigned int and -EBADF is inappropriate, poll functions return POLL* statuses. Reported-by: Dexuan Cui <decui@microsoft.com> Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com> Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* | Drivers: hv: vmbus: fix the building warning with hyperv-keyboardDexuan Cui2015-12-212-10/+8
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | With the recent change af3ff643ea91ba64dd8d0b1cbed54d44512f96cd (Drivers: hv: vmbus: Use uuid_le type consistently), we always get this warning: CC [M] drivers/input/serio/hyperv-keyboard.o drivers/input/serio/hyperv-keyboard.c:427:2: warning: missing braces around initializer [-Wmissing-braces] { HV_KBD_GUID, }, ^ drivers/input/serio/hyperv-keyboard.c:427:2: warning: (near initialization for .id_table[0].guid.b.) [-Wmissing-braces] The patch fixes the warning. Signed-off-by: Dexuan Cui <decui@microsoft.com> Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* | Drivers: hv: ring_buffer: eliminate hv_ringbuffer_peek()Vitaly Kuznetsov2015-12-153-64/+42
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Currently, there is only one user for hv_ringbuffer_read()/ hv_ringbuffer_peak() functions and the usage of these functions is: - insecure as we drop ring_lock between them, someone else (in theory only) can acquire it in between; - non-optimal as we do a number of things (acquire/release the above mentioned lock, calculate available space on the ring, ...) twice and this path is performance-critical. Remove hv_ringbuffer_peek() moving the logic from __vmbus_recvpacket() to hv_ringbuffer_read(). Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com> Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* | Drivers: hv: remove code duplication between ↵Vitaly Kuznetsov2015-12-151-43/+22
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | vmbus_recvpacket()/vmbus_recvpacket_raw() vmbus_recvpacket() and vmbus_recvpacket_raw() are almost identical but there are two discrepancies: 1) vmbus_recvpacket() doesn't propagate errors from hv_ringbuffer_read() which looks like it is not desired. 2) There is an error message printed in packetlen > bufferlen case in vmbus_recvpacket(). I'm removing it as it is usless for users to see such messages and /vmbus_recvpacket_raw() doesn't have it. Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com> Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* | Drivers: hv: ring_buffer: remove code duplication from hv_ringbuffer_peek/read()Vitaly Kuznetsov2015-12-151-43/+25
| | | | | | | | | | | | | | | | | | | | | | hv_ringbuffer_peek() does the same as hv_ringbuffer_read() without advancing the read index. The only functional change this patch brings is moving hv_need_to_signal_on_read() call under the ring_lock but this function is just a couple of comparisons. Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com> Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* | Drivers: hv: ring_buffer: remove stray smp_read_barrier_depends()Vitaly Kuznetsov2015-12-151-2/+0
| | | | | | | | | | | | | | | | | | | | smp_read_barrier_depends() does nothing on almost all arcitectures including x86 and having it in the beginning of hv_get_ringbuffer_availbytes() does not provide any guarantees anyway. Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com> Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* | Drivers: hv: ring_buffer.c: fix comment styleVitaly Kuznetsov2015-12-151-109/+26
| | | | | | | | | | | | | | | | | | | | Convert 6+-string comments repeating function names to normal kernel-style comments and fix a couple of other comment style issues. No textual or functional changes intended. Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com> Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* | Drivers: hv: utils: fix crash when device is removed from host sideVitaly Kuznetsov2015-12-151-3/+23
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The crash is observed when a service is being disabled host side while userspace daemon is connected to the device: [ 90.244859] general protection fault: 0000 [#1] SMP ... [ 90.800082] Call Trace: [ 90.800082] [<ffffffff81187008>] __fput+0xc8/0x1f0 [ 90.800082] [<ffffffff8118716e>] ____fput+0xe/0x10 ... [ 90.800082] [<ffffffff81015278>] do_signal+0x28/0x580 [ 90.800082] [<ffffffff81086656>] ? finish_task_switch+0xa6/0x180 [ 90.800082] [<ffffffff81443ebf>] ? __schedule+0x28f/0x870 [ 90.800082] [<ffffffffa01ebbaa>] ? hvt_op_read+0x12a/0x140 [hv_utils] ... The problem is that hvutil_transport_destroy() which does misc_deregister() freeing the appropriate device is reachable by two paths: module unload and from util_remove(). While module unload path is protected by .owner in struct file_operations util_remove() path is not. Freeing the device while someone holds an open fd for it is a show stopper. In general, it is not possible to revoke an fd from all users so the only way to solve the issue is to defer freeing the hvutil_transport structure. Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com> Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* | Drivers: hv: utils: introduce HVUTIL_TRANSPORT_DESTROY modeVitaly Kuznetsov2015-12-152-15/+57
| | | | | | | | | | | | | | | | | | | | | | | | | | | | When Hyper-V host asks us to remove some util driver by closing the appropriate channel there is no easy way to force the current file descriptor holder to hang up but we can start to respond -EBADF to all operations asking it to exit gracefully. As we're setting hvt->mode from two separate contexts now we need to use a proper locking. Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com> Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* | Drivers: hv: utils: rename outmsg_lockVitaly Kuznetsov2015-12-152-8/+8
| | | | | | | | | | | | | | | | | | As a preparation to reusing outmsg_lock to protect test-and-set openrations on 'mode' rename it the more general 'lock'. Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com> Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* | Drivers: hv: utils: fix memory leak on on_msg() failureVitaly Kuznetsov2015-12-151-3/+4
| | | | | | | | | | | | | | | | | | inmsg should be freed in case of on_msg() failure to avoid memory leak. Preserve the error code from on_msg(). Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com> Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* | tools: hv: vss: fix the write()'s argument: error -> vss_msgDexuan Cui2015-12-151-1/+1
| | | | | | | | | | | | | | | | | | | | | | Fix the write()'s argument in the daemon code. Cc: Vitaly Kuznetsov <vkuznets@redhat.com> Cc: "K. Y. Srinivasan" <kys@microsoft.com> Signed-off-by: Dexuan Cui <decui@microsoft.com> Cc: stable@vger.kernel.org Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* | Drivers: hv: utils: Invoke the poll function after handshakeK. Y. Srinivasan2015-12-152-2/+2
| | | | | | | | | | | | | | | | | | | | When the handshake with daemon is complete, we should poll the channel since during the handshake, we will not be processing any messages. This is a potential bug if the host is waiting for a response from the guest. I would like to thank Dexuan for pointing this out. Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* | Drivers: hv: vmbus: Force all channel messages to be delivered on CPU 0K. Y. Srinivasan2015-12-151-4/+7
| | | | | | | | | | | | | | | | | | Force all channel messages to be delivered on CPU0. These messages are not performance critical and are used during the setup and teardown of the channel. Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* | drivers/hv: correct tsc page sequence invalid valueAndrey Smetanin2015-12-151-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Hypervisor Top Level Functional Specification v3/4 says that TSC page sequence value = -1(0xFFFFFFFF) is used to indicate that TSC page no longer reliable source of reference timer. Unfortunately, we found that Windows Hyper-V guest side implementation uses sequence value = 0 to indicate that Tsc page no longer valid. This is clearly visible inside Windows 2012R2 ntoskrnl.exe HvlGetReferenceTime() function dissassembly: HvlGetReferenceTime proc near xchg ax, ax loc_1401C3132: mov rax, cs:HvlpReferenceTscPage mov r9d, [rax] test r9d, r9d jz short loc_1401C3176 rdtsc mov rcx, cs:HvlpReferenceTscPage shl rdx, 20h or rdx, rax mov rax, [rcx+8] mov rcx, cs:HvlpReferenceTscPage mov r8, [rcx+10h] mul rdx mov rax, cs:HvlpReferenceTscPage add rdx, r8 mov ecx, [rax] cmp ecx, r9d jnz short loc_1401C3132 jmp short loc_1401C3184 loc_1401C3176: mov ecx, 40000020h rdmsr shl rdx, 20h or rdx, rax loc_1401C3184: mov rax, rdx retn HvlGetReferenceTime endp This patch aligns Tsc page invalid sequence value with Windows Hyper-V guest implementation which is more compatible with both Hyper-V hypervisor and KVM hypervisor. Signed-off-by: Andrey Smetanin <asmetanin@virtuozzo.com> Signed-off-by: Denis V. Lunev <den@openvz.org> CC: "K. Y. Srinivasan" <kys@microsoft.com> CC: Haiyang Zhang <haiyangz@microsoft.com> CC: Vitaly Kuznetsov <vkuznets@redhat.com> Signed-off-by: Denis V. Lunev <den@openvz.org> Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* | Drivers: hv: vmbus: Fix a Host signaling bugK. Y. Srinivasan2015-12-152-0/+36
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Currently we have two policies for deciding when to signal the host: One based on the ring buffer state and the other based on what the VMBUS client driver wants to do. Consider the case when the client wants to explicitly control when to signal the host. In this case, if the client were to defer signaling, we will not be able to signal the host subsequently when the client does want to signal since the ring buffer state will prevent the signaling. Implement logic to have only one signaling policy in force for a given channel. Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Reviewed-by: Haiyang Zhang <haiyangz@microsoft.com> Tested-by: Haiyang Zhang <haiyangz@microsoft.com> Cc: <stable@vger.kernel.org> # v4.2+ Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* | drivers:hv: Allow for MMIO claims that span ACPI _CRS recordsJake Oshins2015-12-151-0/+16
| | | | | | | | | | | | | | | | | | | | This patch makes 16GB GPUs work in Hyper-V VMs, since, for compatibility reasons, the Hyper-V BIOS lists MMIO ranges in 2GB chunks in its root bus's _CRS object. Signed-off-by: Jake Oshins <jakeo@microsoft.com> Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* | Drivers: hv: vmbus: channge vmbus_connection.channel_lock to mutexDexuan Cui2015-12-153-11/+10
| | | | | | | | | | | | | | | | | | spinlock is unnecessary here. mutex is enough. Signed-off-by: Dexuan Cui <decui@microsoft.com> Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* | Drivers: hv: vmbus: release relid on error in vmbus_process_offer()Dexuan Cui2015-12-151-6/+15
| | | | | | | | | | | | | | | | | | We want to simplify vmbus_onoffer_rescind() by not invoking hv_process_channel_removal(NULL, ...). Signed-off-by: Dexuan Cui <decui@microsoft.com> Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* | Drivers: hv: vmbus: fix rescind-offer handling for device without a driverDexuan Cui2015-12-153-21/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In the path vmbus_onoffer_rescind() -> vmbus_device_unregister() -> device_unregister() -> ... -> __device_release_driver(), we can see for a device without a driver loaded: dev->driver is NULL, so dev->bus->remove(dev), namely vmbus_remove(), isn't invoked. As a result, vmbus_remove() -> hv_process_channel_removal() isn't invoked and some cleanups(like sending a CHANNELMSG_RELID_RELEASED message to the host) aren't done. We can demo the issue this way: 1. rmmod hv_utils; 2. disable the Heartbeat Integration Service in Hyper-V Manager and lsvmbus shows the device disappears. 3. re-enable the Heartbeat in Hyper-V Manager and modprobe hv_utils, but lsvmbus shows the device can't appear again. This is because, the host thinks the VM hasn't released the relid, so can't re-offer the device to the VM. We can fix the issue by moving hv_process_channel_removal() from vmbus_close_internal() to vmbus_device_release(), since the latter is always invoked on device_unregister(), whether or not the dev has a driver loaded. Signed-off-by: Dexuan Cui <decui@microsoft.com> Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* | Drivers: hv: vmbus: do sanity check of channel state in vmbus_close_internal()Dexuan Cui2015-12-151-0/+12
| | | | | | | | | | | | | | | | This fixes an incorrect assumption of channel state in the function. Signed-off-by: Dexuan Cui <decui@microsoft.com> Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* | Drivers: hv: vmbus: serialize process_chn_event() and vmbus_close_internal()Dexuan Cui2015-12-151-2/+19
| | | | | | | | | | | | | | | | | | | | | | | | | | | | process_chn_event(), running in the tasklet, can race with vmbus_close_internal() in the case of SMP guest, e.g., when the former is accessing channel->inbound.ring_buffer, the latter could be freeing the ring_buffer pages. To resolve the race, we can serialize them by disabling the tasklet when the latter is running here. Signed-off-by: Dexuan Cui <decui@microsoft.com> Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* | Drivers: hv: vmbus: Get rid of the unused irq variableK. Y. Srinivasan2015-12-151-13/+3
| | | | | | | | | | | | | | | | The irq we extract from ACPI is not used - we deliver hypervisor interrupts on a special vector. Make the necessary adjustments. Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* | Drivers: hv: vmbus: Get rid of the unused macroK. Y. Srinivasan2015-12-151-13/+0
| | | | | | | | | | | | | | The macro VMBUS_DEVICE() is unused; get rid of it. Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* | Drivers: hv: vmbus: Use uuid_le_cmp() for comparing GUIDsK. Y. Srinivasan2015-12-152-4/+3
| | | | | | | | | | | | | | Use uuid_le_cmp() for comparing GUIDs. Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* | Drivers: hv: vmbus: Use uuid_le type consistentlyK. Y. Srinivasan2015-12-155-68/+40
| | | | | | | | | | | | | | Consistently use uuid_le type in the Hyper-V driver code. Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* | Drivers: hv: vss: run only on supported host versionsOlaf Hering2015-12-151-0/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The Backup integration service on WS2012 has appearently trouble to negotiate with a guest which does not support the provided util version. Currently the VSS driver supports only version 5/0. A WS2012 offers only version 1/x and 3/x, and vmbus_prep_negotiate_resp correctly returns an empty icframe_vercnt/icmsg_vercnt. But the host ignores that and continues to send ICMSGTYPE_NEGOTIATE messages. The result are weird errors during boot and general misbehaviour. Check the Windows version to work around the host bug, skip hv_vss_init on WS2012 and older. Signed-off-by: Olaf Hering <olaf@aepfle.de> Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* | drivers:hv: Define the channel type for Hyper-V PCI Express pass-throughJake Oshins2015-12-152-0/+14
| | | | | | | | | | | | | | | | This defines the channel type for PCI front-ends in Hyper-V VMs. Signed-off-by: Jake Oshins <jakeo@microsoft.com> Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* | drivers:hv: Export the API to invoke a hypercall on Hyper-VJake Oshins2015-12-153-11/+12
| | | | | | | | | | | | | | | | | | | | | | | | This patch exposes the function that hv_vmbus.ko uses to make hypercalls. This is necessary for retargeting an interrupt when it is given a new affinity. Since we are exporting this API, rename the API as it will be visible outside the hv.c file. Signed-off-by: Jake Oshins <jakeo@microsoft.com> Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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