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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>
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@ -2438,7 +2438,7 @@ static int atmci_configure_dma(struct atmel_mci *host)
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struct mci_platform_data *pdata = host->pdev->dev.platform_data;
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dma_cap_mask_t mask;
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if (!pdata->dma_filter)
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if (!pdata || !pdata->dma_filter)
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return -ENODEV;
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dma_cap_zero(mask);
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