linux-kernel - [34-longterm 105/260] i915: return -EFAULT if copy_to

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Message-Id: <1293952756-15010-106-git-send-email-paul.gortmaker@windriver.com>
Date:	Sun,  2 Jan 2011 02:16:41 -0500
From:	Paul Gortmaker <paul.gortmaker@...driver.com>
To:	stable@...nel.org, linux-kernel@...r.kernel.org
Cc:	stable-review@...nel.org, Dan Carpenter <error27@...il.com>,
	Chris Wilson <chris@...is-wilson.co.uk>,
	Paul Gortmaker <paul.gortmaker@...driver.com>
Subject: [34-longterm 105/260] i915: return -EFAULT if copy_to_user fails

From: Dan Carpenter <error27@...il.com>

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@...il.com>
Signed-off-by: Chris Wilson <chris@...is-wilson.co.uk>
Signed-off-by: Paul Gortmaker <paul.gortmaker@...driver.com>
---
 drivers/gpu/drm/i915/i915_gem.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index 37a9ea3..e07722a 100644
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -3818,6 +3818,7 @@ 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;
 		}
 	}
-- 
1.7.3.3

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