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Subject[PATCH] wlcore: use memdup_user
Date
Use memdup_user() helper instead of open-coding to simplify the code.

Signed-off-by: Geliang Tang <geliangtang@gmail.com>
---
drivers/net/wireless/ti/wlcore/debugfs.c | 13 +++----------
1 file changed, 3 insertions(+), 10 deletions(-)

diff --git a/drivers/net/wireless/ti/wlcore/debugfs.c b/drivers/net/wireless/ti/wlcore/debugfs.c
index de7e2a5..a2cb408 100644
--- a/drivers/net/wireless/ti/wlcore/debugfs.c
+++ b/drivers/net/wireless/ti/wlcore/debugfs.c
@@ -1149,15 +1149,9 @@ static ssize_t dev_mem_write(struct file *file, const char __user *user_buf,
part.mem.start = *ppos;
part.mem.size = bytes;

- buf = kmalloc(bytes, GFP_KERNEL);
- if (!buf)
- return -ENOMEM;
-
- ret = copy_from_user(buf, user_buf, bytes);
- if (ret) {
- ret = -EFAULT;
- goto err_out;
- }
+ buf = memdup_user(user_buf, bytes);
+ if (IS_ERR(buf))
+ return PTR_ERR(buf);

mutex_lock(&wl->mutex);

@@ -1197,7 +1191,6 @@ static ssize_t dev_mem_write(struct file *file, const char __user *user_buf,
if (ret == 0)
*ppos += bytes;

-err_out:
kfree(buf);

return ((ret == 0) ? bytes : ret);
--
2.9.3
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