4.5-stable review patch. If anyone has any objections, please let me know.
------------------ From: Brent Taylor <[email protected]> commit 93c77d2999b09f2084b033ea6489915e0104ad9c upstream. 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 <[email protected]> Signed-off-by: Ulf Hansson <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]> --- drivers/mmc/host/atmel-mci.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/drivers/mmc/host/atmel-mci.c +++ b/drivers/mmc/host/atmel-mci.c @@ -2443,7 +2443,7 @@ static int atmci_configure_dma(struct at 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);
