diff options
Diffstat (limited to 'drivers/dma')
| -rw-r--r-- | drivers/dma/stm32-dma.c | 20 |
1 files changed, 9 insertions, 11 deletions
diff --git a/drivers/dma/stm32-dma.c b/drivers/dma/stm32-dma.c index 3688d0873a3e..a8c2ad686173 100644 --- a/drivers/dma/stm32-dma.c +++ b/drivers/dma/stm32-dma.c @@ -421,7 +421,7 @@ static void stm32_dma_dump_reg(struct stm32_dma_chan *chan) dev_dbg(chan2dev(chan), "SFCR: 0x%08x\n", sfcr); } -static int stm32_dma_start_transfer(struct stm32_dma_chan *chan) +static void stm32_dma_start_transfer(struct stm32_dma_chan *chan) { struct stm32_dma_device *dmadev = stm32_dma_get_dev(chan); struct virt_dma_desc *vdesc; @@ -432,12 +432,12 @@ static int stm32_dma_start_transfer(struct stm32_dma_chan *chan) ret = stm32_dma_disable_chan(chan); if (ret < 0) - return ret; + return; if (!chan->desc) { vdesc = vchan_next_desc(&chan->vchan); if (!vdesc) - return -EPERM; + return; chan->desc = to_stm32_dma_desc(vdesc); chan->next_sg = 0; @@ -471,7 +471,7 @@ static int stm32_dma_start_transfer(struct stm32_dma_chan *chan) chan->busy = true; - return 0; + dev_dbg(chan2dev(chan), "vchan %p: started\n", &chan->vchan); } static void stm32_dma_configure_next_sg(struct stm32_dma_chan *chan) @@ -552,15 +552,13 @@ static void stm32_dma_issue_pending(struct dma_chan *c) { struct stm32_dma_chan *chan = to_stm32_dma_chan(c); unsigned long flags; - int ret; spin_lock_irqsave(&chan->vchan.lock, flags); - if (!chan->busy) { - if (vchan_issue_pending(&chan->vchan) && !chan->desc) { - ret = stm32_dma_start_transfer(chan); - if ((!ret) && (chan->desc->cyclic)) - stm32_dma_configure_next_sg(chan); - } + if (vchan_issue_pending(&chan->vchan) && !chan->desc && !chan->busy) { + dev_dbg(chan2dev(chan), "vchan %p: issued\n", &chan->vchan); + stm32_dma_start_transfer(chan); + if (chan->desc->cyclic) + stm32_dma_configure_next_sg(chan); } spin_unlock_irqrestore(&chan->vchan.lock, flags); } |