@@ -321,15 +321,10 @@ bnad_debugfs_write_regrd(struct file *file, const char __user *buf,
unsigned long flags;
void *kern_buf;
- /* Allocate memory to store the user space buf */
- kern_buf = kzalloc(nbytes, GFP_KERNEL);
- if (!kern_buf)
- return -ENOMEM;
-
- if (copy_from_user(kern_buf, (void __user *)buf, nbytes)) {
- kfree(kern_buf);
- return -ENOMEM;
- }
+ /* Copy the user space buf */
+ kern_buf = memdup_user(buf, nbytes);
+ if (IS_ERR(kern_buf))
+ return PTR_ERR(kern_buf);
rc = sscanf(kern_buf, "%x:%x", &addr, &len);
if (rc < 2) {
@@ -341,7 +336,6 @@ bnad_debugfs_write_regrd(struct file *file, const char __user *buf,
kfree(kern_buf);
kfree(bnad->regdata);
- bnad->regdata = NULL;
bnad->reglen = 0;
bnad->regdata = kzalloc(len << 2, GFP_KERNEL);
@@ -388,15 +382,10 @@ bnad_debugfs_write_regwr(struct file *file, const char __user *buf,
unsigned long flags;
void *kern_buf;
- /* Allocate memory to store the user space buf */
- kern_buf = kzalloc(nbytes, GFP_KERNEL);
- if (!kern_buf)
- return -ENOMEM;
-
- if (copy_from_user(kern_buf, (void __user *)buf, nbytes)) {
- kfree(kern_buf);
- return -ENOMEM;
- }
+ /* Copy the user space buf */
+ kern_buf = memdup_user(buf, nbytes);
+ if (IS_ERR(kern_buf))
+ return PTR_ERR(kern_buf);
rc = sscanf(kern_buf, "%x:%x", &addr, &val);
if (rc < 2) {
Patch converts kzalloc->copy_from_user sequence to memdup_user. There is also one useless assignment of NULL to bnad->regdata as it is followed by assignment of kzalloc output. Signed-off-by: Ivan Vecera <ivecera@redhat.com> --- drivers/net/ethernet/brocade/bna/bnad_debugfs.c | 27 ++++++++----------------- 1 file changed, 8 insertions(+), 19 deletions(-)