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| author | Nicholas Graumann <nick.graumann@gmail.com> | 2019-10-15 20:18:24 +0530 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-01-04 19:12:38 +0100 |
| commit | c4986e473435a2b1b5825848e087c1df5be1964a (patch) | |
| tree | 55f88e2e0f25714318d57ebc3b33546e596ddfed | |
| parent | 40179e745ff74de306897b2ebbbb1f877880d464 (diff) | |
| download | linux-stable-c4986e473435a2b1b5825848e087c1df5be1964a.tar.gz linux-stable-c4986e473435a2b1b5825848e087c1df5be1964a.tar.bz2 linux-stable-c4986e473435a2b1b5825848e087c1df5be1964a.zip | |
dmaengine: xilinx_dma: Clear desc_pendingcount in xilinx_dma_reset
[ Upstream commit 8a631a5a0f7d4a4a24dba8587d5d9152be0871cc ]
Whenever we reset the channel, we need to clear desc_pendingcount
along with desc_submitcount. Otherwise when a new transaction is
submitted, the irq coalesce level could be programmed to an incorrect
value in the axidma case.
This behavior can be observed when terminating pending transactions
with xilinx_dma_terminate_all() and then submitting new transactions
without releasing and requesting the channel.
Signed-off-by: Nicholas Graumann <nick.graumann@gmail.com>
Signed-off-by: Radhey Shyam Pandey <radhey.shyam.pandey@xilinx.com>
Link: https://lore.kernel.org/r/1571150904-3988-8-git-send-email-radhey.shyam.pandey@xilinx.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
| -rw-r--r-- | drivers/dma/xilinx/xilinx_dma.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/dma/xilinx/xilinx_dma.c b/drivers/dma/xilinx/xilinx_dma.c index 8aec137b4fca..d56b6b0e22a8 100644 --- a/drivers/dma/xilinx/xilinx_dma.c +++ b/drivers/dma/xilinx/xilinx_dma.c @@ -1427,6 +1427,7 @@ static int xilinx_dma_reset(struct xilinx_dma_chan *chan) chan->err = false; chan->idle = true; + chan->desc_pendingcount = 0; chan->desc_submitcount = 0; return err; |