[Intel-gfx] [PATCH] drm/i915/perf: fix perf enable/disable ioctls with 32bits userspace

[Lionel Landwerlin]

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 at intel.com>
Fixes: eec688e1420 ("drm/i915: Add i915 perf infrastructure")
Cc: linux-stable <stable at vger.kernel.org>
---
 drivers/gpu/drm/i915/i915_perf.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/gpu/drm/i915/i915_perf.c b/drivers/gpu/drm/i915/i915_perf.c
index 1383a2995a69..59ee808f8fd9 100644
--- a/drivers/gpu/drm/i915/i915_perf.c
+++ b/drivers/gpu/drm/i915/i915_perf.c
@@ -2537,6 +2537,10 @@ 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,
 };
 
 
-- 
2.15.0.rc2