@@ -2399,7 +2399,15 @@ char *gpiochip_dup_line_label(struct gpio_chip *gc, unsigned int offset)
if (!test_bit(FLAG_REQUESTED, &desc->flags))
return NULL;
- label = kstrdup(desc->label, GFP_KERNEL);
+ /*
+ * FIXME: Once we mark gpiod_direction_input/output() and
+ * gpiod_get_direction() with might_sleep(), we'll be able to protect
+ * the GPIO descriptors with mutex (while value setting operations will
+ * become lockless).
+ *
+ * Until this happens, this allocation needs to be atomic.
+ */
+ label = kstrdup(desc->label, GFP_ATOMIC);
if (!label)
return ERR_PTR(-ENOMEM);