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Date: Fri, 7 Jul 2017 01:22:14 -0500 From: "Gustavo A. R. Silva" <garsilva@...eddedor.com> To: Alan Tull <atull@...nel.org>, Moritz Fischer <moritz.fischer@...us.com> Cc: linux-fpga@...r.kernel.org, linux-kernel@...r.kernel.org, "Gustavo A. R. Silva" <garsilva@...eddedor.com> Subject: [PATCH] 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 <garsilva@...eddedor.com> --- drivers/fpga/altera-hps2fpga.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/fpga/altera-hps2fpga.c b/drivers/fpga/altera-hps2fpga.c index 3066b80..ca8212c 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_by_index(dev->of_node, 0); -- 2.5.0
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