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@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>

1 files changed, 5 insertions, 0 deletions

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,