This patch fixes the following Coccinelle warning:
drivers/gpu/drm/tegra/submit.c:173: WARNING opportunity for vmemdup_user
Use vmemdup_user rather than duplicating its implementation
This is a little bit restricted to reduce false positives
Signed-off-by: Qing Wang <wangqing@xxxxxxxx>
---
drivers/gpu/drm/tegra/submit.c | 11 +++--------
1 file changed, 3 insertions(+), 8 deletions(-)
diff --git a/drivers/gpu/drm/tegra/submit.c b/drivers/gpu/drm/tegra/submit.c
index c326984..0b11f1a
--- a/drivers/gpu/drm/tegra/submit.c
+++ b/drivers/gpu/drm/tegra/submit.c
@@ -169,14 +169,9 @@ static void *alloc_copy_user_array(void __user *from, size_t count, size_t size)
if (copy_len > 0x4000)
return ERR_PTR(-E2BIG);
- data = kvmalloc(copy_len, GFP_KERNEL);
- if (!data)
- return ERR_PTR(-ENOMEM);
-
- if (copy_from_user(data, from, copy_len)) {
- kvfree(data);
- return ERR_PTR(-EFAULT);
- }
+ data = vmemdup_user(from, copy_len);
+ if (IS_ERR(data))
+ return ERR_CAST(data);
return data;
}
--
2.7.4
