diff options
| author | Andy Shevchenko <andriy.shevchenko@linux.intel.com> | 2014-09-12 15:11:58 +0300 |
|---|---|---|
| committer | Jiri Slaby <jslaby@suse.cz> | 2014-10-31 15:11:10 +0100 |
| commit | eeef301b6d8d548d8577cfb14ca1c56ca323bfb7 (patch) | |
| tree | faddeb43e90a9f074d8e61784e711de4ea20b18a /drivers | |
| parent | 15bc7947fa4a4cf121c46f317c6f1c349b5894d8 (diff) | |
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 <andriy.shevchenko@linux.intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/spi/spi-dw-mid.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/spi/spi-dw-mid.c b/drivers/spi/spi-dw-mid.c index 58fa14d27ffa..b8ac40c8a22d 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); } |