From: Nicholas Graumann <nick.graumann@xxxxxxxxx> [ 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@xxxxxxxxx> Signed-off-by: Radhey Shyam Pandey <radhey.shyam.pandey@xxxxxxxxxx> Link: https://lore.kernel.org/r/1571150904-3988-8-git-send-email-radhey.shyam.pandey@xxxxxxxxxx Signed-off-by: Vinod Koul <vkoul@xxxxxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> --- drivers/dma/xilinx/xilinx_dma.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/dma/xilinx/xilinx_dma.c b/drivers/dma/xilinx/xilinx_dma.c index 5d56f1e4d332c..43acba2a1c0ee 100644 --- a/drivers/dma/xilinx/xilinx_dma.c +++ b/drivers/dma/xilinx/xilinx_dma.c @@ -1433,6 +1433,7 @@ 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; -- 2.20.1
