[PATCH 11/33] dmaengine: at_hdmac: Do not call the complete callback on device_terminate_all
From: Tudor Ambarus <hidden>
Date: 2022-08-20 12:58:50
Also in:
dmaengine, lkml, stable
Subsystem:
dma generic offload engine subsystem, microchip at91 dma drivers, the rest · Maintainers:
Vinod Koul, Ludovic Desroches, Linus Torvalds
The method was wrong because it violated the dmaengine API. For aborted
transfers the complete callback should not be called. Fix the behavior and
do not call the complete callback on device_terminate_all.
Fixes: 808347f6a317 ("dmaengine: at_hdmac: add DMA slave transfers")
Reported-by: Peter Rosin <redacted>
Signed-off-by: Tudor Ambarus <redacted>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/lkml/13c6c9a2-6db5-c3bf-349b-4c127ad3496a@axentia.se/ (local)
---
drivers/dma/at_hdmac.c | 11 ++---------
1 file changed, 2 insertions(+), 9 deletions(-)
diff --git a/drivers/dma/at_hdmac.c b/drivers/dma/at_hdmac.c
index c445575f8646..b3895e5d2ae9 100644
--- a/drivers/dma/at_hdmac.c
+++ b/drivers/dma/at_hdmac.c@@ -1879,11 +1879,8 @@ static int atc_terminate_all(struct dma_chan *chan) struct at_dma_chan *atchan = to_at_dma_chan(chan); struct at_dma *atdma = to_at_dma(chan->device); int chan_id = atchan->dma_chan.chan_id; - struct at_desc *desc, *_desc; unsigned long flags; - LIST_HEAD(list); - dev_vdbg(chan2dev(chan), "%s\n", __func__); /*
@@ -1902,15 +1899,11 @@ static int atc_terminate_all(struct dma_chan *chan) cpu_relax(); /* active_list entries will end up before queued entries */ - list_splice_init(&atchan->queue, &list); - list_splice_init(&atchan->active_list, &list); + list_splice_tail_init(&atchan->queue, &atchan->free_list); + list_splice_tail_init(&atchan->active_list, &atchan->free_list); spin_unlock_irqrestore(&atchan->lock, flags); - /* Flush all pending and queued descriptors */ - list_for_each_entry_safe(desc, _desc, &list, desc_node) - atc_chain_complete(atchan, desc); - clear_bit(ATC_IS_PAUSED, &atchan->status); /* if channel dedicated to cyclic operations, free it */ clear_bit(ATC_IS_CYCLIC, &atchan->status);
--
2.25.1
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel