From: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Date: Fri, 12 Sep 2014 12:11:58 +0000 (+0300)
Subject: spi: dw-mid: check that DMA was inited before exit
X-Git-Tag: fixes-for-v3.18-merge-window~30^2~3^4~12
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=fb57862ead652454ceeb659617404c5f13bc34b5;p=pandora-kernel.git

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>
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