Commit 93c77d29 authored Mar 13, 2016 by Brent Taylor Committed by Ulf Hansson Mar 17, 2016

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: Brent Taylor <motobud@gmail.com>
Cc: stable@vger.kernel.org
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

parent a0747eb8

drivers/mmc/host/atmel-mci.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -2438,7 +2438,7 @@ static int atmci_configure_dma(struct atmel_mci *host)
		struct mci_platform_data *pdata = host->pdev->dev.platform_data;
		dma_cap_mask_t mask;

		if (!pdata->dma_filter)
		if (!pdata \|\| !pdata->dma_filter)
		return -ENODEV;

		dma_cap_zero(mask);