mmc: atmel-mci: Check pdata for NULL before dereferencing it at DMA config
Using an at91sam9g20ek development board with DTS configuration may trigger a kernel panic because of a NULL pointer dereference exception, while configuring DMA. Let's fix this by adding a check for pdata before dereferencing it. Signed-off-by: NBrent Taylor <motobud@gmail.com> Cc: stable@vger.kernel.org Signed-off-by: NUlf Hansson <ulf.hansson@linaro.org>
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