diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/net/wireless/ath/ath6kl/htc_pipe.c | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/drivers/net/wireless/ath/ath6kl/htc_pipe.c b/drivers/net/wireless/ath/ath6kl/htc_pipe.c index 73a38f9392f9..281390178e3d 100644 --- a/drivers/net/wireless/ath/ath6kl/htc_pipe.c +++ b/drivers/net/wireless/ath/ath6kl/htc_pipe.c @@ -967,6 +967,22 @@ static int ath6kl_htc_pipe_rx_complete(struct ath6kl *ar, struct sk_buff *skb, u16 payload_len; int status = 0; + /* + * ar->htc_target can be NULL due to a race condition that can occur + * during driver initialization(we do 'ath6kl_hif_power_on' before + * initializing 'ar->htc_target' via 'ath6kl_htc_create'). + * 'ath6kl_hif_power_on' assigns 'ath6kl_recv_complete' as + * usb_complete_t/callback function for 'usb_fill_bulk_urb'. + * Thus the possibility of ar->htc_target being NULL + * via ath6kl_recv_complete -> ath6kl_usb_io_comp_work. + */ + if (WARN_ON_ONCE(!target)) { + ath6kl_err("Target not yet initialized\n"); + status = -EINVAL; + goto free_skb; + } + + netdata = skb->data; netlen = skb->len; |