mmc: sdhci-esdhc-imx: avoid DMA to kernel stack
sdhci-esdhc-imx tries to DMA to the kernel stack when tuning the interface, which causes dma-debug to complain. Fix this by kmallocing a buffer to hold the received tuning pattern. Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk> Tested-by: NMarkus Pargmann <mpa@pengutronix.de> Tested-by: NStephen Warren <swarren@nvidia.com> Signed-off-by: NUlf Hansson <ulf.hansson@linaro.org> Signed-off-by: NChris Ball <chris@printf.net>
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