[PATCH 1/2] GPU-DRM-Savage: Use memdup_user() rather than duplicating

SF Markus Elfring
2016-08-19T02:53:20Z

Date: Thu, 18 Aug 2016 18:12:03 +0200

Reuse existing functionality from memdup_user() instead of keeping
duplicate source code.

This issue was detected by using the Coccinelle software.

Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
---
drivers/gpu/drm/savage/savage_state.c | 12 +++---------
1 file changed, 3 insertions(+), 9 deletions(-)

diff --git a/drivers/gpu/drm/savage/savage_state.c b/drivers/gpu/drm/savage/savage_state.c
index c01ad0a..3dc0d8f 100644
--- a/drivers/gpu/drm/savage/savage_state.c
+++ b/drivers/gpu/drm/savage/savage_state.c
@@ -1001,15 +1001,9 @@ int savage_bci_cmdbuf(struct drm_device *dev, void *data, struct drm_file *file_
cmdbuf->cmd_addr = kcmd_addr;
}
if (cmdbuf->vb_size) {
- kvb_addr = kmalloc(cmdbuf->vb_size, GFP_KERNEL);
- if (kvb_addr == NULL) {
- ret = -ENOMEM;
- goto done;
- }
-
- if (copy_from_user(kvb_addr, cmdbuf->vb_addr,
- cmdbuf->vb_size)) {
- ret = -EFAULT;
+ kvb_addr = memdup_user(cmdbuf->vb_addr, cmdbuf->vb_size);
+ if (IS_ERR(kvb_addr)) {
+ ret = PTR_ERR(kvb_addr);
goto done;
}
cmdbuf->vb_addr = kvb_addr;
--
2.9.3