diff options
Diffstat (limited to 'drivers/i2c')
-rw-r--r-- | drivers/i2c/busses/i2c-sh_mobile.c | 26 |
1 files changed, 9 insertions, 17 deletions
diff --git a/drivers/i2c/busses/i2c-sh_mobile.c b/drivers/i2c/busses/i2c-sh_mobile.c index db8fa4186814..7b8caf172851 100644 --- a/drivers/i2c/busses/i2c-sh_mobile.c +++ b/drivers/i2c/busses/i2c-sh_mobile.c @@ -442,34 +442,26 @@ static irqreturn_t sh_mobile_i2c_isr(int irq, void *dev_id) return IRQ_HANDLED; } -static void sh_mobile_i2c_dma_unmap(struct sh_mobile_i2c_data *pd) +static void sh_mobile_i2c_cleanup_dma(struct sh_mobile_i2c_data *pd, bool terminate) { struct dma_chan *chan = pd->dma_direction == DMA_FROM_DEVICE ? pd->dma_rx : pd->dma_tx; + /* only allowed from thread context! */ + if (terminate) + dmaengine_terminate_sync(chan); + dma_unmap_single(chan->device->dev, sg_dma_address(&pd->sg), pd->msg->len, pd->dma_direction); pd->dma_direction = DMA_NONE; } -static void sh_mobile_i2c_cleanup_dma(struct sh_mobile_i2c_data *pd) -{ - if (pd->dma_direction == DMA_NONE) - return; - else if (pd->dma_direction == DMA_FROM_DEVICE) - dmaengine_terminate_sync(pd->dma_rx); - else if (pd->dma_direction == DMA_TO_DEVICE) - dmaengine_terminate_sync(pd->dma_tx); - - sh_mobile_i2c_dma_unmap(pd); -} - static void sh_mobile_i2c_dma_callback(void *data) { struct sh_mobile_i2c_data *pd = data; - sh_mobile_i2c_dma_unmap(pd); + sh_mobile_i2c_cleanup_dma(pd, false); pd->pos = pd->msg->len; pd->stop_after_dma = true; @@ -549,7 +541,7 @@ static void sh_mobile_i2c_xfer_dma(struct sh_mobile_i2c_data *pd) DMA_PREP_INTERRUPT | DMA_CTRL_ACK); if (!txdesc) { dev_dbg(pd->dev, "dma prep slave sg failed, using PIO\n"); - sh_mobile_i2c_cleanup_dma(pd); + sh_mobile_i2c_cleanup_dma(pd, false); return; } @@ -559,7 +551,7 @@ static void sh_mobile_i2c_xfer_dma(struct sh_mobile_i2c_data *pd) cookie = dmaengine_submit(txdesc); if (dma_submit_error(cookie)) { dev_dbg(pd->dev, "submitting dma failed, using PIO\n"); - sh_mobile_i2c_cleanup_dma(pd); + sh_mobile_i2c_cleanup_dma(pd, false); return; } @@ -698,7 +690,7 @@ static int sh_mobile_xfer(struct sh_mobile_i2c_data *pd, if (!time_left) { dev_err(pd->dev, "Transfer request timed out\n"); if (pd->dma_direction != DMA_NONE) - sh_mobile_i2c_cleanup_dma(pd); + sh_mobile_i2c_cleanup_dma(pd, true); err = -ETIMEDOUT; break; |