diff options
| author | Bob Copeland <me@bobcopeland.com> | 2015-01-09 14:15:48 -0500 |
|---|---|---|
| committer | Kalle Valo <kvalo@codeaurora.org> | 2015-01-23 19:12:01 +0200 |
| commit | bfa6696b39ae4da554a8b8ec9d17bba1ed6ae889 (patch) | |
| tree | a33decaa6ad72ee5a18bfb55aa80bd1ef92efc1a | |
| parent | 232ddcd80fa5c878efd631c6562cbaa24535bdc1 (diff) | |
| download | linux-bfa6696b39ae4da554a8b8ec9d17bba1ed6ae889.tar.bz2 | |
wcn36xx: don't process 'valid' descriptors
The DMA engine will reset the valid bit after a descriptor is
complete; any with the valid bit still set may still be in
use by the hardware, so check that before freeing the descriptor.
Signed-off-by: Bob Copeland <me@bobcopeland.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
| -rw-r--r-- | drivers/net/wireless/ath/wcn36xx/dxe.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/net/wireless/ath/wcn36xx/dxe.c b/drivers/net/wireless/ath/wcn36xx/dxe.c index 73f12f196f14..3d6bc9b87176 100644 --- a/drivers/net/wireless/ath/wcn36xx/dxe.c +++ b/drivers/net/wireless/ath/wcn36xx/dxe.c @@ -354,6 +354,8 @@ static void reap_tx_dxes(struct wcn36xx *wcn, struct wcn36xx_dxe_ch *ch) * and while-do will not make any cycles. */ do { + if (ctl->desc->ctrl & WCN36XX_DXE_CTRL_VALID_MASK) + break; if (ctl->skb) { dma_unmap_single(NULL, ctl->desc->src_addr_l, ctl->skb->len, DMA_TO_DEVICE); |