This is a note to let you know that I've just added the patch titled drm/i915/perf: fix perf enable/disable ioctls with 32bits userspace to the 4.13-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: drm-i915-perf-fix-perf-enable-disable-ioctls-with-32bits-userspace.patch and it can be found in the queue-4.13 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. >From 7277f755048da562eb2489becacd38d0d05e1e06 Mon Sep 17 00:00:00 2001 From: Lionel Landwerlin <lionel.g.landwerlin@xxxxxxxxx> Date: Tue, 24 Oct 2017 16:27:28 +0100 Subject: drm/i915/perf: fix perf enable/disable ioctls with 32bits userspace From: Lionel Landwerlin <lionel.g.landwerlin@xxxxxxxxx> commit 7277f755048da562eb2489becacd38d0d05e1e06 upstream. The compat callback was missing and triggered failures in 32bits userspace when enabling/disable the perf stream. We don't require any particular processing here as these ioctls don't take any argument. Signed-off-by: Lionel Landwerlin <lionel.g.landwerlin@xxxxxxxxx> Fixes: eec688e1420 ("drm/i915: Add i915 perf infrastructure") Reviewed-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx> Link: https://patchwork.freedesktop.org/patch/msgid/20171024152728.4873-1-lionel.g.landwerlin@xxxxxxxxx (cherry picked from commit 191f896085cf3b5d85920d58a759da4eea141721) Signed-off-by: Rodrigo Vivi <rodrigo.vivi@xxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- drivers/gpu/drm/i915/i915_perf.c | 4 ++++ 1 file changed, 4 insertions(+) --- a/drivers/gpu/drm/i915/i915_perf.c +++ b/drivers/gpu/drm/i915/i915_perf.c @@ -2480,6 +2480,10 @@ static const struct file_operations fops .poll = i915_perf_poll, .read = i915_perf_read, .unlocked_ioctl = i915_perf_ioctl, + /* Our ioctl have no arguments, so it's safe to use the same function + * to handle 32bits compatibility. + */ + .compat_ioctl = i915_perf_ioctl, }; Patches currently in stable-queue which might be from lionel.g.landwerlin@xxxxxxxxx are queue-4.13/drm-i915-perf-fix-perf-enable-disable-ioctls-with-32bits-userspace.patch