[PATCH] backlight: qcom-wled: Add NULL check in the wled_configure

[Henry Martin]

When devm_kasprintf() fails, it returns a NULL pointer. However, this return 
value is not properly checked in the function wled_configure.

A NULL check should be added after the devm_kasprintf call to prevent potential 
NULL pointer dereference error.

Fixes: f86b77583d88c ("backlight: pm8941: Convert to using %pOFn instead of 
device_node.name")

Signed-off-by: Henry Martin <bsdhenrymar...@gmail.com>
---
 drivers/video/backlight/qcom-wled.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/drivers/video/backlight/qcom-wled.c 
b/drivers/video/backlight/qcom-wled.c
index 9afe701b2a1b..db5eda8ec37e 100644
--- a/drivers/video/backlight/qcom-wled.c
+++ b/drivers/video/backlight/qcom-wled.c
@@ -1406,8 +1406,14 @@ static int wled_configure(struct wled *wled)
        wled->ctrl_addr = be32_to_cpu(*prop_addr);
 
        rc = of_property_read_string(dev->of_node, "label", &wled->name);
-       if (rc)
+       if (rc) {
                wled->name = devm_kasprintf(dev, GFP_KERNEL, "%pOFn", 
dev->of_node);
+               if (!wled->name) {
+                       dev_err(dev, "Failed to allocate memory for wled 
name\n");
+                       return -ENOMEM;
+               }
+       }
+
 
        switch (wled->version) {
        case 3:
-- 
2.34.1