From 4e973d3174fe8d683c382bc5261a3d8643f91242 Mon Sep 17 00:00:00 2001 From: Andy Shevchenko Date: Fri, 12 Sep 2014 15:11:58 +0300 Subject: spi: dw-mid: check that DMA was inited before exit commit fb57862ead652454ceeb659617404c5f13bc34b5 upstream. 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 Signed-off-by: Mark Brown Signed-off-by: Greg Kroah-Hartman --- drivers/spi/spi-dw-mid.c | 2 ++ 1 file changed, 2 insertions(+) (limited to 'drivers/spi') diff --git a/drivers/spi/spi-dw-mid.c b/drivers/spi/spi-dw-mid.c index 48c170cd3e25..6192d7ad4190 100644 --- a/drivers/spi/spi-dw-mid.c +++ b/drivers/spi/spi-dw-mid.c @@ -89,6 +89,8 @@ err_exit: 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); } -- cgit v1.2.3