gitops/mt76
1
0
Fork 0
mirror of https://github.com/outbackdingo/mt76.git synced 2026-10-24 13:26:48 +00:00
Code Issues Packages Projects Releases Wiki Activity

mt76: set dma-done flag for flushed descriptors

Browse Source 
Avoids a theoretical corner case where the hardware could try to process
a stale descriptor after a watchdog reset

Signed-off-by: Felix Fietkau <[email protected]>
This commit is contained in:
Felix Fietkau
2020-02-20 14:56:47 +01:00
parent 3d491603ca
commit 9792a62e7f
1 changed files with 3 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files
dma.c
+3 -1
View File
@@ -238,7 +238,9 @@ 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;