4.4-stable review patch. If anyone has any objections, please let me know.
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From: Aditya Pakki pakki001@umn.edu
commit 3a10e3dd52e80b9a97a3346020024d17b2c272d6 upstream.
of_match_device can return a NULL pointer when matching device is not found. This patch avoids a scenario causing NULL pointer derefernce.
Signed-off-by: Aditya Pakki pakki001@umn.edu Cc: stable stable@vger.kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- drivers/tty/serial/max310x.c | 2 ++ 1 file changed, 2 insertions(+)
--- a/drivers/tty/serial/max310x.c +++ b/drivers/tty/serial/max310x.c @@ -1306,6 +1306,8 @@ static int max310x_spi_probe(struct spi_ if (spi->dev.of_node) { const struct of_device_id *of_id = of_match_device(max310x_dt_ids, &spi->dev); + if (!of_id) + return -ENODEV;
devtype = (struct max310x_devtype *)of_id->data; } else {