blackfin: check devm_pinctrl_get() for errors

commit c9205e18 upstream.

devm_pinctrl_get() can fail so we should check for that.

Fixes: 0a6824bc ('[media] v4l2: blackfin: select proper pinctrl state in ppi_set_params if CONFIG_PINCTRL is enabled')
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/media/platform/blackfin/ppi.c

@@ -214,6 +214,8 @@ static int ppi_set_params(struct ppi_if *ppi, struct ppi_params *params)
 	if (params->dlen > 24 || params->dlen <= 0)
 		return -EINVAL;
 	pctrl = devm_pinctrl_get(ppi->dev);
+	if (IS_ERR(pctrl))
+		return PTR_ERR(pctrl);
 	pstate = pinctrl_lookup_state(pctrl,
 				      pin_state[(params->dlen + 7) / 8 - 1]);
 	if (pinctrl_select_state(pctrl, pstate))