Messages in this thread Patch in this message | | | From | Schrempf Frieder <> | Subject | [PATCH] dma: imx-sdma: Fix the event id check to include RX event for UART6 | Date | Mon, 24 Feb 2020 17:22:46 +0000 |
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From: Frieder Schrempf <frieder.schrempf@kontron.de>
On i.MX6 the DMA event for the RX channel of UART6 is '0'. To fix the broken DMA support for UART6, we change the check for event_id0 to include '0' as a valid id.
Fixes: 1ec1e82f2510 ("dmaengine: Add Freescale i.MX SDMA support") Cc: stable@vger.kernel.org Signed-off-by: Frieder Schrempf <frieder.schrempf@kontron.de> --- drivers/dma/imx-sdma.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/dma/imx-sdma.c b/drivers/dma/imx-sdma.c index 066b21a32232..3d4aac97b1fc 100644 --- a/drivers/dma/imx-sdma.c +++ b/drivers/dma/imx-sdma.c @@ -1331,7 +1331,7 @@ static void sdma_free_chan_resources(struct dma_chan *chan) sdma_channel_synchronize(chan); - if (sdmac->event_id0) + if (sdmac->event_id0 >= 0) sdma_event_disable(sdmac, sdmac->event_id0); if (sdmac->event_id1) sdma_event_disable(sdmac, sdmac->event_id1); @@ -1631,7 +1631,7 @@ 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 >= 0) { if (sdmac->event_id0 >= sdmac->sdma->drvdata->num_events) return -EINVAL; sdma_event_enable(sdmac, sdmac->event_id0); -- 2.17.1
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