From 626c4e85a107a2dbf9b482371ada8fee39680ce2 Mon Sep 17 00:00:00 2001 From: Antonio Borneo Date: Tue, 1 Aug 2017 22:09:25 +0200 Subject: [PATCH] dmaengine: k3dma: fix non-cyclic mode Commit 36387a2b1f62b5c087c5fe6f0f7b23b94f722ad7 ("k3dma: Fix memory handling in preparation for cyclic mode") broke the logic around ds_run/ds_done in case of non-cyclic DMA. This went unnoticed as the only user of k3dma was the i2s audio driver but, with a patch set to enable dma on SPI, the issue popped out. The fix re-applies the initialization to ds_run/ds_done in k3_dma_start_txd() that were removed by the commit above. Also, one of the calls to k3_dma_start_txd() is triggered by (ds_done != NULL), so remove the noisy and useless call to WARN_ON_ONCE(). Signed-off-by: Antonio Borneo Signed-off-by: Vinod Koul --- drivers/dma/k3dma.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/dma/k3dma.c b/drivers/dma/k3dma.c index 01e25c68dd5a..c00eb1244fcf 100644 --- a/drivers/dma/k3dma.c +++ b/drivers/dma/k3dma.c @@ -275,12 +275,14 @@ static int k3_dma_start_txd(struct k3_dma_chan *c) list_del(&ds->vd.node); WARN_ON_ONCE(c->phy->ds_run); - WARN_ON_ONCE(c->phy->ds_done); c->phy->ds_run = ds; + c->phy->ds_done = NULL; /* start dma */ k3_dma_set_desc(c->phy, &ds->desc_hw[0]); return 0; } + c->phy->ds_run = NULL; + c->phy->ds_done = NULL; return -EAGAIN; } -- 2.20.1