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wifi: wil6210: debugfs: fix uninitialized variable use in `wil_write_file_wmi()` 

Commit 7a4836560a changes simple_write_to_buffer() with memdup_user()
but it forgets to change the value to be returned that came from
simple_write_to_buffer() call. It results in the following warning:

  warning: variable 'rc' is uninitialized when used here [-Wuninitialized]
           return rc;
                  ^~

Remove rc variable and just return the passed in length if the
memdup_user() succeeds.

Cc: Dan Carpenter <dan.carpenter@oracle.com>
Reported-by: kernel test robot <lkp@intel.com>
Fixes: 7a4836560a ("wifi: wil6210: debugfs: fix info leak in wil_write_file_wmi()")
Fixes: ff974e4083 ("wil6210: debugfs interface to send raw WMI command")
Signed-off-by: Ammar Faizi <ammarfaizi2@gnuweeb.org>
Reviewed-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Kalle Valo <quic_kvalo@quicinc.com>
Link: https://lore.kernel.org/r/20220724202452.61846-1-ammar.faizi@intel.com
This commit is contained in:
Ammar Faizi 2022-07-25 20:49:11 +03:00 committed by Kalle Valo
parent 169ede1f59
commit d578e0af3a
1 changed files with 2 additions and 2 deletions
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4
drivers/net/wireless/ath/wil6210/debugfs.c
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@ -1010,7 +1010,7 @@ static ssize_t wil_write_file_wmi(struct file *file, const char __user *buf,
void *cmd;
int cmdlen = len - sizeof(struct wmi_cmd_hdr);
u16 cmdid;
int rc, rc1;
int rc1;
if (cmdlen < 0 || *ppos != 0)
return -EINVAL;
@ -1027,7 +1027,7 @@ static ssize_t wil_write_file_wmi(struct file *file, const char __user *buf,
wil_info(wil, "0x%04x[%d] -> %d\n", cmdid, cmdlen, rc1);
return rc;
return len;
}
static const struct file_operations fops_wmi = {