From: Gustavo A. R. Silva Date: Wed, 2 Aug 2017 02:20:53 +0000 (-0500) Subject: fpga: altera-hps2fpga: add NULL check on of_match_device() return value X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=26ffca5ec406213da347cd3c5858d1414943caea;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git fpga: altera-hps2fpga: add NULL check on of_match_device() return value Check return value from call to of_match_device() in order to prevent a NULL pointer dereference. In case of NULL print error message and return -ENODEV Signed-off-by: Gustavo A. R. Silva Reviewed-by: Moritz Fischer Signed-off-by: Alan Tull Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/fpga/altera-hps2fpga.c b/drivers/fpga/altera-hps2fpga.c index a18ff430c9af..e6c948b31474 100644 --- a/drivers/fpga/altera-hps2fpga.c +++ b/drivers/fpga/altera-hps2fpga.c @@ -143,6 +143,11 @@ static int alt_fpga_bridge_probe(struct platform_device *pdev) int ret; of_id = of_match_device(altera_fpga_of_match, dev); + if (!of_id) { + dev_err(dev, "failed to match device\n"); + return -ENODEV; + } + priv = (struct altera_hps2fpga_data *)of_id->data; priv->bridge_reset = of_reset_control_get_exclusive_by_index(dev->of_node,