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@vivo.com --- 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; }