[PATCH] Tty: serial - Fix possible NULL derefrence.

[Shailendra Verma]

of_match_device could return NULL, and so can cause a NULL
pointer dereference later.

Signed-off-by: Shailendra Verma <shailendra.v@xxxxxxxxxxx>
---
 drivers/tty/serial/max310x.c |    4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/tty/serial/max310x.c b/drivers/tty/serial/max310x.c
index 8a3e926..a94d147 100644
--- a/drivers/tty/serial/max310x.c
+++ b/drivers/tty/serial/max310x.c
@@ -1323,6 +1323,10 @@ static int max310x_spi_probe(struct spi_device *spi)
 	if (spi->dev.of_node) {
 		const struct of_device_id *of_id =
 			of_match_device(max310x_dt_ids, &spi->dev);
+		if (!of_id) {
+			dev_err(&spi->dev, "Error: No device match found\n");
+			return -ENODEV;
+		}
 
 		devtype = (struct max310x_devtype *)of_id->data;
 	} else {
-- 
1.7.9.5