Commit fb57862e authored Sep 12, 2014 by Andy Shevchenko Committed by Mark Brown Sep 13, 2014

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: 7063c0d9 (spi/dw_spi: add DMA support)
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

parent 05ed2aee

drivers/spi/spi-dw-mid.c

+2 −0

Original line number	Diff line number	Diff line
		@@ -89,6 +89,8 @@ static int mid_spi_dma_init(struct dw_spi *dws)

		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);
		}