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wil6210: fix dma mapping error cleanup in __wil_tx_vring_tso

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In case we fail to map one of the TSO SKB fragments, we need to
clear all the mapped descriptors, from swhead to swhead+descs_used-1.

Change the desc index calculation to
i = (swhead + descs_used - 1) % vring->size;
to prevent unmpping of (swhead + descs_used) descriptor that wasn't
mapped.

Signed-off-by: Maya Erez <qca_merez@qca.qualcomm.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>
This commit is contained in:
Maya Erez 2016-05-16 22:23:33 +03:00 committed by Kalle Valo
parent 34b8886e50
commit a1526f7eaf
1 changed files with 1 additions and 1 deletions
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2
drivers/net/wireless/ath/wil6210/txrx.c
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@ -1594,7 +1594,7 @@ static int __wil_tx_vring_tso(struct wil6210_priv *wil, struct vring *vring,
while (descs_used > 0) {
struct wil_ctx *ctx;
i = (swhead + descs_used) % vring->size;
i = (swhead + descs_used - 1) % vring->size;
d = (struct vring_tx_desc *)&vring->va[i].tx;
_desc = &vring->va[i].tx;
*d = *_desc;