Patch "drm/i915/perf: fix perf enable/disable ioctls with 32bits userspace" has been added to the 4.13-stable tree

Patch "drm/i915/perf: fix perf enable/disable ioctls with 32bits userspace" has been added to the 4.13-stable tree

[gregkh]

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@vger.kernel.org> know about it.


>From 7277f755048da562eb2489becacd38d0d05e1e06 Mon Sep 17 00:00:00 2001
From: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
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@intel.com>

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@intel.com>
Fixes: eec688e1420 ("drm/i915: Add i915 perf infrastructure")
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: https://patchwork.freedesktop.org/patch/msgid/20171024152728.4873-1-lionel.g.landwerlin@intel.com
(cherry picked from commit 191f896085cf3b5d85920d58a759da4eea141721)
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 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@intel.com are

queue-4.13/drm-i915-perf-fix-perf-enable-disable-ioctls-with-32bits-userspace.patch