diff options
| author | Felix Fietkau <nbd@nbd.name> | 2020-01-20 12:07:09 +0100 |
|---|---|---|
| committer | Felix Fietkau <nbd@nbd.name> | 2020-02-14 10:06:06 +0100 |
| commit | 5ffc6b5a98404db51529c427ccbccd4878593cea (patch) | |
| tree | 8c9cbe303dda2ef3974c2b5e1fa8f6b9835c802c /drivers/net/wireless/mediatek/mt76/dma.c | |
| parent | mt76: mt76u: introduce MT_DRV_RX_DMA_HDR flag (diff) | |
| download | linux-5ffc6b5a98404db51529c427ccbccd4878593cea.tar.xz linux-5ffc6b5a98404db51529c427ccbccd4878593cea.zip | |
mt76: set dma-done flag for flushed descriptors
Avoids a theoretical corner case where the hardware could try to process
a stale descriptor after a watchdog reset
Signed-off-by: Felix Fietkau <nbd@nbd.name>
Diffstat (limited to 'drivers/net/wireless/mediatek/mt76/dma.c')
| -rw-r--r-- | drivers/net/wireless/mediatek/mt76/dma.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/net/wireless/mediatek/mt76/dma.c b/drivers/net/wireless/mediatek/mt76/dma.c index 9e03a7871ff4..e69329feed78 100644 --- a/drivers/net/wireless/mediatek/mt76/dma.c +++ b/drivers/net/wireless/mediatek/mt76/dma.c @@ -246,7 +246,9 @@ mt76_dma_dequeue(struct mt76_dev *dev, struct mt76_queue *q, bool flush, if (!q->queued) return NULL; - if (!flush && !(q->desc[idx].ctrl & cpu_to_le32(MT_DMA_CTL_DMA_DONE))) + if (flush) + q->desc[idx].ctrl |= cpu_to_le32(MT_DMA_CTL_DMA_DONE); + else if (!(q->desc[idx].ctrl & cpu_to_le32(MT_DMA_CTL_DMA_DONE))) return NULL; q->tail = (q->tail + 1) % q->ndesc; |