lib/string_helpers: fix not adding strarray to device's resource list

commit cd290a9 upstream.

Add allocated strarray to device's resource list. This is a must to
automatically release strarray when the device disappears.

Without this fix we have a memory leak in the few drivers which use
devm_kasprintf_strarray().

Link: https://lkml.kernel.org/r/[email protected]
Link: https://lkml.kernel.org/r/[email protected]
Fixes: acdb89b ("lib/string_helpers: Introduce managed variant of kasprintf_strarray()")
Signed-off-by: Puyou Lu <[email protected]>
Reviewed-by: Andy Shevchenko <[email protected]>
Reviewed-by: Linus Walleij <[email protected]>
Cc: Tejun Heo <[email protected]>
Cc: <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>

Author: puyoulu

lib/string_helpers.c

@@ -757,6 +757,9 @@ char **devm_kasprintf_strarray(struct device *dev, const char *prefix, size_t n)
 		return ERR_PTR(-ENOMEM);
 	}
 
+	ptr->n = n;
+	devres_add(dev, ptr);
+
 	return ptr->array;
 }
 EXPORT_SYMBOL_GPL(devm_kasprintf_strarray);