[PATCH v3 04/12] dmaengine: at_xdmac: Fix concurrency over chan's completed_cookie
flat view
STALE1743d
LANDED
From: Tudor Ambarus <hidden>
Date: 2021-12-15 11:01:42
Also in:
dmaengine, lkml
Subsystem:
dma generic offload engine subsystem, microchip at91 dma drivers, the rest · Maintainers:
Vinod Koul, Ludovic Desroches, Linus Torvalds
Revision v3 of 3 in this series; landed in mainline as 506875c30fc5 on 2022-01-05.
Revisions (3)
- v1 [diff vs current]
- v2 [diff vs current]
- v3 current
Caller of dma_cookie_complete is expected to hold a lock to prevent
concurrency over the channel's completed cookie marker. Call
dma_cookie_complete() with the lock held.
Fixes: e1f7c9eee707 ("dmaengine: at_xdmac: creation of the atmel eXtended DMA Controller driver")
Signed-off-by: Tudor Ambarus <redacted>
---
drivers/dma/at_xdmac.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/drivers/dma/at_xdmac.c b/drivers/dma/at_xdmac.c
index 7d3560acedbb..83c031207530 100644
--- a/drivers/dma/at_xdmac.c
+++ b/drivers/dma/at_xdmac.c@@ -1703,11 +1703,10 @@ static void at_xdmac_tasklet(struct tasklet_struct *t) } txd = &desc->tx_dma_desc; - + dma_cookie_complete(txd); at_xdmac_remove_xfer(atchan, desc); spin_unlock_irq(&atchan->lock); - dma_cookie_complete(txd); if (txd->flags & DMA_PREP_INTERRUPT) dmaengine_desc_get_callback_invoke(txd, NULL);
--
2.25.1
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