| Message ID | 1463456936-10634-4-git-send-email-jiada_wang@mentor.com (mailing list archive) |
|---|---|
| State | Not Applicable |
| Headers | show |
diff --git a/drivers/dma/imx-sdma.c b/drivers/dma/imx-sdma.c index 887e4e5..1489de0 100644 --- a/drivers/dma/imx-sdma.c +++ b/drivers/dma/imx-sdma.c @@ -671,6 +671,7 @@ static void sdma_handle_channel_loop(struct sdma_channel *sdmac) if (bd->mode.status & BD_RROR) sdmac->status = DMA_ERROR; + bd->mode.status &= ~BD_RROR; bd->mode.status |= BD_DONE; sdmac->buf_tail++; sdmac->buf_tail %= sdmac->num_bd;
Previously in cyclic dma mode when sdma transfer fails for one buffer, it will mask BD_RROR flag for that buffer descriptor (BD). This flag won't be cleared unless a new cyclic dma transfer is prepared, so if sdma script next time iterates to the same BD, even this time the transfer is successful, but as BD_RROR flag is set, client side will still think the transfer failed. This patch clears BD_RROR flag before pass it to sdma script. Signed-off-by: Jiada Wang <jiada_wang@mentor.com> --- drivers/dma/imx-sdma.c | 1 + 1 file changed, 1 insertion(+)