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Subject[PATCH V4 linux-next RESEND 2] bfa: replace 2 kzalloc/copy_from_user by memdup_user
Date
This patch also removes unnecessary printk(KERN_INFO

Signed-off-by: Fabian Frederick <fabf@skynet.be>
---
V4: remove blank line after memdup_user
V3: memdup_user first argument is already void __user * (thanks to Joe Perches)
typo in title
V2: Remove printk(KERN_INFO (suggested by Alan)

drivers/scsi/bfa/bfad_debugfs.c | 30 ++++++------------------------
1 file changed, 6 insertions(+), 24 deletions(-)

diff --git a/drivers/scsi/bfa/bfad_debugfs.c b/drivers/scsi/bfa/bfad_debugfs.c
index 8e83d04..74a307c 100644
--- a/drivers/scsi/bfa/bfad_debugfs.c
+++ b/drivers/scsi/bfa/bfad_debugfs.c
@@ -260,18 +260,9 @@ bfad_debugfs_write_regrd(struct file *file, const char __user *buf,
unsigned long flags;
void *kern_buf;

- kern_buf = kzalloc(nbytes, GFP_KERNEL);
-
- if (!kern_buf) {
- printk(KERN_INFO "bfad[%d]: Failed to allocate buffer\n",
- bfad->inst_no);
- return -ENOMEM;
- }
-
- if (copy_from_user(kern_buf, (void __user *)buf, nbytes)) {
- kfree(kern_buf);
- return -ENOMEM;
- }
+ 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) {
@@ -336,18 +327,9 @@ bfad_debugfs_write_regwr(struct file *file, const char __user *buf,
unsigned long flags;
void *kern_buf;

- kern_buf = kzalloc(nbytes, GFP_KERNEL);
-
- if (!kern_buf) {
- printk(KERN_INFO "bfad[%d]: Failed to allocate buffer\n",
- bfad->inst_no);
- return -ENOMEM;
- }
-
- if (copy_from_user(kern_buf, (void __user *)buf, nbytes)) {
- kfree(kern_buf);
- return -ENOMEM;
- }
+ 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) {
--
1.9.3


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