In case there were no DMA channel requested the modprobe -r spi_dw_midpci is
going to crash. This patch fixes an issue.
Signed-off-by: Andy Shevchenko <andriy.shevche...@linux.intel.com>
---
drivers/spi/spi-dw-mid.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/drivers/spi/spi-dw-mid.c b/drivers/spi/spi-dw-mid.c
index b9f0192..4fac682 100644
--- a/drivers/spi/spi-dw-mid.c
+++ b/drivers/spi/spi-dw-mid.c
@@ -89,8 +89,10 @@ err_exit:
static void mid_spi_dma_exit(struct dw_spi *dws)
{
- dma_release_channel(dws->txchan);
- dma_release_channel(dws->rxchan);
+ if (dws->dma_inited) {
+ dma_release_channel(dws->txchan);
+ dma_release_channel(dws->rxchan);
+ }
}
/*
--
1.7.10.4
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