From: Krzysztof Kozlowski <krzk@xxxxxxxxxx>
commit 687a2e76186dcfa42f22c14b655c3fb159839e79 upstream.
If dma_request_chan() for TX channel fails with EPROBE_DEFER, the RX
channel would not be released and on next re-probe it would be requested
second time.
Fixes: 386119bc7be9 ("spi: sprd: spi: sprd: Add DMA mode support")
Cc: <stable@xxxxxxxxxxxxxxx>
Signed-off-by: Krzysztof Kozlowski <krzk@xxxxxxxxxx>
Acked-by: Chunyan Zhang <zhang.lyra@xxxxxxxxx>
Link: https://lore.kernel.org/r/20200901152713.18629-1-krzk@xxxxxxxxxx
Signed-off-by: Mark Brown <broonie@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/spi/spi-sprd.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/spi/spi-sprd.c
+++ b/drivers/spi/spi-sprd.c
@@ -563,11 +563,11 @@ static int sprd_spi_dma_request(struct s
ss->dma.dma_chan[SPRD_SPI_TX] = dma_request_chan(ss->dev, "tx_chn");
if (IS_ERR_OR_NULL(ss->dma.dma_chan[SPRD_SPI_TX])) {
+ dma_release_channel(ss->dma.dma_chan[SPRD_SPI_RX]);
if (PTR_ERR(ss->dma.dma_chan[SPRD_SPI_TX]) == -EPROBE_DEFER)
return PTR_ERR(ss->dma.dma_chan[SPRD_SPI_TX]);
dev_err(ss->dev, "request TX DMA channel failed!\n");
- dma_release_channel(ss->dma.dma_chan[SPRD_SPI_RX]);
return PTR_ERR(ss->dma.dma_chan[SPRD_SPI_TX]);
}
