diff options
| author | Pavel Andrianov <andrianov@ispras.ru> | 2016-08-02 12:41:53 +0300 |
|---|---|---|
| committer | Kalle Valo <kvalo@codeaurora.org> | 2016-09-03 13:01:18 +0300 |
| commit | bd6b0242652a8a284eed2adec5ac1fc043b8f2ef (patch) | |
| tree | 27ebd6c1668fd09df467db60337e43752112d7e5 | |
| parent | b0d80f19c14fc5752e806860fe2c702448f5b442 (diff) | |
wl3501_cs: Add spinlock to wl3501_reset
Likely wl3501_reset should acquire spinlock as wl3501_{open, close}.
One of calls of wl3501_reset has been already protected.
The others were unprotected and might lead to a race condition.
The patch adds spinlock into the wl3501_reset and removes it from
wl3501_tx_timeout.
Found by Linux Driver Verification project (linuxtesting.org)
Signed-off-by: Pavel Andrianov <andrianov@ispras.ru>
Acked-by: Vaishali Thakkar <vaishali.thakkar@oracle.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
| -rw-r--r-- | drivers/net/wireless/wl3501_cs.c | 7 |
1 files changed, 3 insertions, 4 deletions
diff --git a/drivers/net/wireless/wl3501_cs.c b/drivers/net/wireless/wl3501_cs.c index 82d94f83b6b4..932f3f81e8cf 100644 --- a/drivers/net/wireless/wl3501_cs.c +++ b/drivers/net/wireless/wl3501_cs.c @@ -1258,7 +1258,9 @@ static int wl3501_reset(struct net_device *dev) { struct wl3501_card *this = netdev_priv(dev); int rc = -ENODEV; + unsigned long flags; + spin_lock_irqsave(&this->lock, flags); wl3501_block_interrupt(this); if (wl3501_init_firmware(this)) { @@ -1280,20 +1282,17 @@ static int wl3501_reset(struct net_device *dev) pr_debug("%s: device reset", dev->name); rc = 0; out: + spin_unlock_irqrestore(&this->lock, flags); return rc; } static void wl3501_tx_timeout(struct net_device *dev) { - struct wl3501_card *this = netdev_priv(dev); struct net_device_stats *stats = &dev->stats; - unsigned long flags; int rc; stats->tx_errors++; - spin_lock_irqsave(&this->lock, flags); rc = wl3501_reset(dev); - spin_unlock_irqrestore(&this->lock, flags); if (rc) printk(KERN_ERR "%s: Error %d resetting card on Tx timeout!\n", dev->name, rc); |