Messages in this thread | | | From | Moritz Fischer <> | Date | Mon, 10 Jul 2017 09:25:56 -0700 | Subject | Re: [PATCH] fpga: altera-hps2fpga: add NULL check on of_match_device() return value |
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On Thu, Jul 6, 2017 at 11:22 PM, Gustavo A. R. Silva <garsilva@embeddedor.com> wrote: > 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> > --- > 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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