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Commit bfa6696b authored by Bob Copeland's avatar Bob Copeland Committed by Kalle Valo
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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: default avatarBob Copeland <me@bobcopeland.com>
Signed-off-by: default avatarKalle Valo <kvalo@codeaurora.org>
parent 232ddcd8

drivers/net/wireless/ath/wcn36xx/dxe.c

+2 −0
Original line number Original line Diff line number Diff line
@@ -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.

	 * and while-do will not make any cycles.

	 */

	 */

	do {

	do {

		if (ctl->desc->ctrl & WCN36XX_DXE_CTRL_VALID_MASK)

			break;

		if (ctl->skb) {

		if (ctl->skb) {

			dma_unmap_single(NULL, ctl->desc->src_addr_l,

			dma_unmap_single(NULL, ctl->desc->src_addr_l,

					 ctl->skb->len, DMA_TO_DEVICE);

					 ctl->skb->len, DMA_TO_DEVICE);