[PATCH v4 04/14] usb: hub: Return actual error from hub_configure() in hub_probe()

[Chen-Yu Tsai <wenst@chromium.org>]

The addition of power sequencing descriptor handling in the USB hub code
requires dealing with deferred probing from pwrseq_get(). The power
sequencing provider may not yet be available when the USB hub probes.

Return the actual error code from hub_configure() when it fails, so that
the driver core can notice the deferred probe request.

Also rewrite this section into the standard error handling pattern:

    if (error) {
        # handle error
        return error;
    }

    # do more work
    return 0;

Reviewed-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Chen-Yu Tsai <wenst@chromium.org>
---
Changes since v2:
- Rewrite into standard error handling pattern

Changes since v1:
- Moved "int ret" declaration in hub_configure() over here from the next
  patch
---
 drivers/usb/core/hub.c | 14 ++++++++------
 1 file changed, 8 insertions(+), 6 deletions(-)

diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c
index 13264e86bc6d..fe10d72ef39d 100644
--- a/drivers/usb/core/hub.c
+++ b/drivers/usb/core/hub.c
@@ -1874,6 +1874,7 @@ static int hub_probe(struct usb_interface *intf, const struct usb_device_id *id)
 	struct usb_host_interface *desc;
 	struct usb_device *hdev;
 	struct usb_hub *hub;
+	int ret;
 
 	desc = intf->cur_altsetting;
 	hdev = interface_to_usbdev(intf);
@@ -2005,14 +2006,15 @@ static int hub_probe(struct usb_interface *intf, const struct usb_device_id *id)
 		usb_set_interface(hdev, 0, 0);
 	}
 
-	if (hub_configure(hub, &desc->endpoint[0].desc) >= 0) {
-		onboard_dev_create_pdevs(hdev, &hub->onboard_devs);
-
-		return 0;
+	ret = hub_configure(hub, &desc->endpoint[0].desc);
+	if (ret < 0) {
+		hub_disconnect(intf);
+		return ret;
 	}
 
-	hub_disconnect(intf);
-	return -ENODEV;
+	onboard_dev_create_pdevs(hdev, &hub->onboard_devs);
+
+	return 0;
 }
 
 static int
-- 
2.55.0.795.g602f6c329a-goog