[PATCH v3 4/4] dma: mxs-dma: Update state after channel reset
From: Markus Pargmann <hidden>
Date: 2013-10-04 10:44:09
Subsystem:
dma generic offload engine subsystem, the rest · Maintainers:
Vinod Koul, Linus Torvalds
After a channel reset, the channel stops running automatically. The state update was missing so that a channel perperation right after a channel reset failed. Signed-off-by: Markus Pargmann <redacted> --- drivers/dma/mxs-dma.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/dma/mxs-dma.c b/drivers/dma/mxs-dma.c
index 98de9a7..e284395 100644
--- a/drivers/dma/mxs-dma.c
+++ b/drivers/dma/mxs-dma.c@@ -234,6 +234,8 @@ static void mxs_dma_reset_chan(struct mxs_dma_chan *mxs_chan) writel(1 << (chan_id + BP_APBHX_CHANNEL_CTRL_RESET_CHANNEL), mxs_dma->base + HW_APBHX_CHANNEL_CTRL + STMP_OFFSET_REG_SET); } + + mxs_chan->status = DMA_SUCCESS; } static void mxs_dma_enable_chan(struct mxs_dma_chan *mxs_chan)
@@ -361,7 +363,7 @@ static irqreturn_t mxs_dma_int_handler(int irq, void *dev_id) chan); mxs_chan->status = DMA_ERROR; mxs_dma_reset_chan(mxs_chan); - } else { + } else if (mxs_chan->status != DMA_SUCCESS) { if (mxs_chan->flags & MXS_DMA_SG_LOOP) mxs_chan->status = DMA_IN_PROGRESS; else
--
1.8.4.rc3