convert a bunch of open-coded instances of memdup_user_nul()

[deliverable/linux.git] / drivers / net / wireless / ath / wil6210 / debugfs.c

diff --git a/drivers/net/wireless/ath/wil6210/debugfs.c b/drivers/net/wireless/ath/wil6210/debugfs.c
index 97bc186f9728247a0048476065d17fe0021a3573..a1d10b85989f7bfec11be8a7352b5a58247daacb 100644 (file)
--- a/drivers/net/wireless/ath/wil6210/debugfs.c
+++ b/drivers/net/wireless/ath/wil6210/debugfs.c
@@ -580,16 +580,10 @@ static ssize_t wil_write_file_rxon(struct file *file, const char __user *buf,
        long channel;
        bool on;
 
-       char *kbuf = kmalloc(len + 1, GFP_KERNEL);
-
-       if (!kbuf)
-               return -ENOMEM;
-       if (copy_from_user(kbuf, buf, len)) {
-               kfree(kbuf);
-               return -EIO;
-       }
+       char *kbuf = memdup_user_nul(buf, len);
 
-       kbuf[len] = '\0';
+       if (IS_ERR(kbuf))
+               return PTR_ERR(kbuf);
        rc = kstrtol(kbuf, 0, &channel);
        kfree(kbuf);
        if (rc)