[PATCH] [V2] usb: chipidea: add a check for the availability of next child

[Aditya Pakki]

of_get_next_available_child returns NULL when no child nodes are found.
The fix checks its return value instead of assuming a child is found.

Signed-off-by: Aditya Pakki <pakki...@umn.edu>
---
 drivers/usb/chipidea/ci_hdrc_msm.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/usb/chipidea/ci_hdrc_msm.c 
b/drivers/usb/chipidea/ci_hdrc_msm.c
index 880009987460..813673eee815 100644
--- a/drivers/usb/chipidea/ci_hdrc_msm.c
+++ b/drivers/usb/chipidea/ci_hdrc_msm.c
@@ -250,6 +250,10 @@ static int ci_hdrc_msm_probe(struct platform_device *pdev)
        ulpi_node = of_get_child_by_name(pdev->dev.of_node, "ulpi");
        if (ulpi_node) {
                phy_node = of_get_next_available_child(ulpi_node, NULL);
+               if (!phy_node) {
+                       ret = -EINVAL;
+                       goto err_mux;
+               }
                ci->hsic = of_device_is_compatible(phy_node, 
"qcom,usb-hsic-phy");
                of_node_put(phy_node);
        }
-- 
2.17.1