drm/i915/perf: fix perf enable/disable ioctls with 32bits userspace
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")
Cc: linux-stable <stable@vger.kernel.org>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: https://patchwork.freedesktop.org/patch/msgid/20171024152728.4873-1-lionel.g.landwerlin@intel.com
diff --git a/drivers/gpu/drm/i915/i915_perf.c b/drivers/gpu/drm/i915/i915_perf.c
index 1383a29..59ee808 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,
};