From: Dan Carpenter <error27@gmail.com>
Date: Wed, 23 Jun 2010 17:03:01 +0000 (+0200)
Subject: i915_gem: return -EFAULT if copy_to_user fails
X-Git-Tag: v2.6.35.5~8
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=9ee313881759bde1d4bd812dda4fb53d856be4a2;p=thirdparty%2Fkernel%2Fstable.git

i915_gem: return -EFAULT if copy_to_user fails

commit c877cdce93a44eea96f6cf7fc04be7d0372db2be upstream.

copy_to_user() returns the number of bytes remaining to be copied and
I'm pretty sure we want to return a negative error code here.

Signed-off-by: Dan Carpenter <error27@gmail.com>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---

diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index 5aa747fc25a9b..06f82382ce6d5 100644
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -3709,6 +3709,7 @@ i915_gem_do_execbuffer(struct drm_device *dev, void *data,
 		if (ret != 0) {
 			DRM_ERROR("copy %d cliprects failed: %d\n",
 				  args->num_cliprects, ret);
+			ret = -EFAULT;
 			goto pre_mutex_err;
 		}
 	}