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fpga: altera-hps2fpga: add NULL check on of_match_device() return value

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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@embeddedor.com>
Reviewed-by: Moritz Fischer <mdf@kernel.org>
Signed-off-by: Alan Tull <atull@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Gustavo A. R. Silva 2017-08-01 21:20:53 -05:00 committed by Greg Kroah-Hartman
parent 4fd72fd29d
commit 26ffca5ec4
1 changed files with 5 additions and 0 deletions
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5
drivers/fpga/altera-hps2fpga.c
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@ -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,