From: Hans de Goede <hdegoede@redhat.com>
Date: Sun, 10 May 2015 12:10:16 +0000 (+0200)
Subject: usb: Stop reset procedure when a dev is handed over to a companion hcd
X-Git-Tag: v2015.07-rc2~239
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=45b9ea1da2f9e5110ced2fe2808aee224183aa54;p=platform%2Fkernel%2Fu-boot.git

usb: Stop reset procedure when a dev is handed over to a companion hcd

Short circuit the retry loop in legacy_hub_port_reset() by returning an
error from usb_control_msg() when a device was handed over to a companion
by the ehci code. This avoids trying to reset low / fullspeed devices 5
times needlessly. Also do not print an error when a device has been handed
over.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
---

diff --git a/common/usb_hub.c b/common/usb_hub.c
index 7aac220..af39c76 100644
--- a/common/usb_hub.c
+++ b/common/usb_hub.c
@@ -271,7 +271,8 @@ int usb_hub_port_connect_change(struct usb_device *dev, int port)
 	/* Reset the port */
 	ret = legacy_hub_port_reset(dev, port, &portstatus);
 	if (ret < 0) {
-		printf("cannot reset port %i!?\n", port + 1);
+		if (ret != -ENXIO)
+			printf("cannot reset port %i!?\n", port + 1);
 		return ret;
 	}
 
diff --git a/drivers/usb/host/ehci-hcd.c b/drivers/usb/host/ehci-hcd.c
index ce760d0..e4c462f 100644
--- a/drivers/usb/host/ehci-hcd.c
+++ b/drivers/usb/host/ehci-hcd.c
@@ -875,7 +875,7 @@ static int ehci_submit_root(struct usb_device *dev, unsigned long pipe,
 				      port - 1);
 				reg |= EHCI_PS_PO;
 				ehci_writel(status_reg, reg);
-				break;
+				return -ENXIO;
 			} else {
 				int ret;
 
@@ -905,6 +905,7 @@ static int ehci_submit_root(struct usb_device *dev, unsigned long pipe,
 						reg &= ~EHCI_PS_CLEAR;
 						reg |= EHCI_PS_PO;
 						ehci_writel(status_reg, reg);
+						return -ENXIO;
 					} else {
 						ctrl->portreset |= 1 << port;
 					}