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| author | Antonio Borneo <borneo.antonio@gmail.com> | 2017-08-01 22:09:25 +0200 |
|---|---|---|
| committer | Vinod Koul <vinod.koul@intel.com> | 2017-08-25 08:45:40 +0200 |
| commit | 626c4e85a107a2dbf9b482371ada8fee39680ce2 (patch) | |
| tree | 4f88084262000ff4bdb717fc5cb0839fefed8512 | |
| parent | Linux v4.13-rc1 (diff) | |
| download | linux-626c4e85a107a2dbf9b482371ada8fee39680ce2.tar.xz linux-626c4e85a107a2dbf9b482371ada8fee39680ce2.zip | |
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 <borneo.antonio@gmail.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
| -rw-r--r-- | drivers/dma/k3dma.c | 4 |
1 files changed, 3 insertions, 1 deletions
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; } |