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wil6210: fix potential null dereference of ndev before null check 

The pointer ndev is being dereferenced before it is being null checked,
hence there is a potential null pointer deference. Fix this by only
dereferencing ndev after it has been null checked

Detected by CoverityScan, CID#1467010 ("Dereference before null check")

Fixes: e00243fab8 ("wil6210: infrastructure for multiple virtual interfaces")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Reviewed-by: Maya Erez <merez@codeaurora.org>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
This commit is contained in:
Colin Ian King 2018-03-28 18:40:27 +01:00 committed by Kalle Valo
parent 6707ba0105
commit db5a4d5e10
1 changed files with 2 additions and 1 deletions
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3
drivers/net/wireless/ath/wil6210/main.c
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@ -391,7 +391,7 @@ static void wil_fw_error_worker(struct work_struct *work)
struct wil6210_priv *wil = container_of(work, struct wil6210_priv,
fw_error_worker);
struct net_device *ndev = wil->main_ndev;
struct wireless_dev *wdev = ndev->ieee80211_ptr;
struct wireless_dev *wdev;
wil_dbg_misc(wil, "fw error worker\n");
@ -399,6 +399,7 @@ static void wil_fw_error_worker(struct work_struct *work)
wil_info(wil, "No recovery - interface is down\n");
return;
}
wdev = ndev->ieee80211_ptr;
/* increment @recovery_count if less then WIL6210_FW_RECOVERY_TO
* passed since last recovery attempt