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Commit 26ffca5e authored by Gustavo A. R. Silva's avatar Gustavo A. R. Silva Committed by Greg Kroah-Hartman
Browse files

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: default avatarGustavo A. R. Silva <garsilva@embeddedor.com>
Reviewed-by: default avatarMoritz Fischer <mdf@kernel.org>
Signed-off-by: default avatarAlan Tull <atull@kernel.org>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 4fd72fd2

drivers/fpga/altera-hps2fpga.c

+5 −0
Original line number Original line Diff line number Diff line
@@ -143,6 +143,11 @@ static int alt_fpga_bridge_probe(struct platform_device *pdev) 
	int ret;

	int ret;





	of_id = of_match_device(altera_fpga_of_match, dev);

	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 = (struct altera_hps2fpga_data *)of_id->data;





	priv->bridge_reset = of_reset_control_get_exclusive_by_index(dev->of_node,

	priv->bridge_reset = of_reset_control_get_exclusive_by_index(dev->of_node,