diff options
| author | Andy Shevchenko <andriy.shevchenko@linux.intel.com> | 2014-09-12 15:11:58 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-10-30 09:38:20 -0700 |
| commit | 4e973d3174fe8d683c382bc5261a3d8643f91242 (patch) | |
| tree | 2857a9dffab21301fe9bcb3f7d8c0632047165c1 | |
| parent | 65eea26bfac18b939ef8274785831bdd74fb12f8 (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: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -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 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); } |