[v1,11/15] dmaengine: imx-sdma: fix ecspi1 rx dma not work on i.mx8mm

Commit Message

Robin Gong April 23, 2019, 1:51 p.m. UTC

Because the number of ecspi1 rx event on i.mx8mm is 0, the condition
check ignore such special case without dma channel enabled, which caused
ecspi1 rx works failed. Actually, no need to check event_id0, checking
event_id1 is enough for DEV_2_DEV case because it's so lucky that event_id1
never be 0.

Signed-off-by: Robin Gong <[e-mail]>
---
 drivers/dma/imx-sdma.c | 12 +++++-------
 1 file changed, 5 insertions(+), 7 deletions(-)

Patch

diff --git a/drivers/dma/imx-sdma.c b/drivers/dma/imx-sdma.c
index 99c44a5..d87a8f9 100644
--- a/drivers/dma/imx-sdma.c
+++ b/drivers/dma/imx-sdma.c
@@ -1363,8 +1363,8 @@  static void sdma_free_chan_resources(struct dma_chan *chan)
 
 	sdma_channel_synchronize(chan);
 
-	if (sdmac->event_id0)
-		sdma_event_disable(sdmac, sdmac->event_id0);
+	sdma_event_disable(sdmac, sdmac->event_id0);
+
 	if (sdmac->event_id1)
 		sdma_event_disable(sdmac, sdmac->event_id1);
 
@@ -1663,11 +1663,9 @@  static int sdma_config(struct dma_chan *chan,
 	memcpy(&sdmac->slave_config, dmaengine_cfg, sizeof(*dmaengine_cfg));
 
 	/* Set ENBLn earlier to make sure dma request triggered after that */
-	if (sdmac->event_id0) {
-		if (sdmac->event_id0 >= sdmac->sdma->drvdata->num_events)
-			return -EINVAL;
-		sdma_event_enable(sdmac, sdmac->event_id0);
-	}
+	if (sdmac->event_id0 >= sdmac->sdma->drvdata->num_events)
+		return -EINVAL;
+	sdma_event_enable(sdmac, sdmac->event_id0);
 
 	if (sdmac->event_id1) {
 		if (sdmac->event_id1 >= sdmac->sdma->drvdata->num_events)