| Message ID | 1406724454-17084-1-git-send-email-luis.henriques@canonical.com |
|---|---|
| State | New |
| Headers | show |
diff --git a/drivers/gpu/drm/qxl/qxl_irq.c b/drivers/gpu/drm/qxl/qxl_irq.c index 21393dc4700a..f4b6b89b98f3 100644 --- a/drivers/gpu/drm/qxl/qxl_irq.c +++ b/drivers/gpu/drm/qxl/qxl_irq.c @@ -33,6 +33,9 @@ irqreturn_t qxl_irq_handler(DRM_IRQ_ARGS) pending = xchg(&qdev->ram_header->int_pending, 0); + if (!pending) + return IRQ_NONE; + atomic_inc(&qdev->irq_received); if (pending & QXL_INTERRUPT_DISPLAY) {
This is a note to let you know that I have just added a patch titled drm/qxl: return IRQ_NONE if it was not our irq to the linux-3.11.y-queue branch of the 3.11.y.z extended stable tree which can be found at: http://kernel.ubuntu.com/git?p=ubuntu/linux.git;a=shortlog;h=refs/heads/linux-3.11.y-queue If you, or anyone else, feels it should not be added to this tree, please reply to this email. For more information about the 3.11.y.z tree, see https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable Thanks. -Luis ------ From f22c54134ae2c653e3b88387e335d11e04cfedca Mon Sep 17 00:00:00 2001 From: Jason Wang <jasowang@redhat.com> Date: Mon, 12 May 2014 16:35:39 +0800 Subject: drm/qxl: return IRQ_NONE if it was not our irq commit fbb60fe35ad579b511de8604b06a30b43846473b upstream. Return IRQ_NONE if it was not our irq. This is necessary for the case when qxl is sharing irq line with a device A in a crash kernel. If qxl is initialized before A and A's irq was raised during this gap, returning IRQ_HANDLED in this case will cause this irq to be raised again after EOI since kernel think it was handled but in fact it was not. Cc: Gerd Hoffmann <kraxel@redhat.com> Signed-off-by: Jason Wang <jasowang@redhat.com> Signed-off-by: Dave Airlie <airlied@redhat.com> Signed-off-by: Luis Henriques <luis.henriques@canonical.com> --- drivers/gpu/drm/qxl/qxl_irq.c | 3 +++ 1 file changed, 3 insertions(+) -- 1.9.1