[PATCH v2 2/9] usb: Return -ENOENT when no devices are found

[Simon Glass]

When USB finds no devices it currently returns -EPERM which bootstd does
not understand. This causes other bootdevs of the same priority to be
skipped.

Fix this by returning the correct error code.

Signed-off-by: Simon Glass <sjg at chromium.org>
---

(no changes since v1)

 drivers/usb/host/usb-uclass.c | 2 +-
 include/usb.h                 | 9 ++++++++-
 2 files changed, 9 insertions(+), 2 deletions(-)

diff --git a/drivers/usb/host/usb-uclass.c b/drivers/usb/host/usb-uclass.c
index 02c0138a2065..7a03435ba773 100644
--- a/drivers/usb/host/usb-uclass.c
+++ b/drivers/usb/host/usb-uclass.c
@@ -346,7 +346,7 @@ int usb_init(void)
 	if (controllers_initialized == 0)
 		printf("No working controllers found\n");
 
-	return usb_started ? 0 : -1;
+	return usb_started ? 0 : -ENOENT;
 }
 
 int usb_setup_ehci_gadget(struct ehci_ctrl **ctlrp)
diff --git a/include/usb.h b/include/usb.h
index 42b001c3dd5e..09e3f0cb309c 100644
--- a/include/usb.h
+++ b/include/usb.h
@@ -257,7 +257,14 @@ int usb_kbd_deregister(int force);
 
 #endif
 /* routines */
-int usb_init(void); /* initialize the USB Controller */
+
+/*
+ * usb_init() - initialize the USB Controllers
+ *
+ * Returns: 0 if OK, -ENOENT if there are no USB devices
+ */
+int usb_init(void);
+
 int usb_stop(void); /* stop the USB Controller */
 int usb_detect_change(void); /* detect if a USB device has been (un)plugged */
 
-- 
2.41.0.487.g6d72f3e995-goog