spi: dw-mid: check that DMA was inited before exit
If the driver was compiled with DMA support, but DMA channels weren't acquired
by some reason, mid_spi_dma_exit() will crash the kernel.
Fixes: 7063c0d942a1 (spi/dw_spi: add DMA support)
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
diff --git a/drivers/spi/spi-dw-mid.c b/drivers/spi/spi-dw-mid.c
index 6d207af..0d88e4a 100644
--- a/drivers/spi/spi-dw-mid.c
+++ b/drivers/spi/spi-dw-mid.c
@@ -89,6 +89,8 @@
static void mid_spi_dma_exit(struct dw_spi *dws)
{
+ if (!dws->dma_inited)
+ return;
dma_release_channel(dws->txchan);
dma_release_channel(dws->rxchan);
}