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authorPeter Chen <peter.chen@freescale.com>2014-11-04 06:14:31 +0300
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2014-11-04 06:29:55 +0300
commitb2108f1e519e983e5dd5712b3a44f7366ab509e4 (patch)
treea8c8eeb71f6f6809b3327c9a4c3021696d7c47bb /drivers/usb
parent01ed67dc70834d00d62b6e754ee0f76301fbc140 (diff)
downloadlinux-b2108f1e519e983e5dd5712b3a44f7366ab509e4.tar.xz
usb: core: notify disconnection when core detects disconnect
It is safe to call notify disconnect when the usb core thinks the device is disconnected. This commit also fixes one bug found at below situation: we have not enabled usb wakeup, we do system suspend when there is an usb device at the port, after suspend, we plug out the usb device, then plug in device again. At that time, the nofity disconnect was not called at current code, as the controller doesn't know the usb device was disconnected during the suspend, but USB core knows the port has changed during that periods. So to fix this problem, and let the usb core call notify disconnect. Cc: 3.17+ <stable@vger.kernel.org> Signed-off-by: Peter Chen <peter.chen@freescale.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb')
-rw-r--r--drivers/usb/core/hub.c3
1 files changed, 1 insertions, 2 deletions
diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c
index 65a8e5055885..b649fef2e35d 100644
--- a/drivers/usb/core/hub.c
+++ b/drivers/usb/core/hub.c
@@ -4624,8 +4624,7 @@ static void hub_port_connect(struct usb_hub *hub, int port1, u16 portstatus,
/* Disconnect any existing devices under this port */
if (udev) {
- if (hcd->usb_phy && !hdev->parent &&
- !(portstatus & USB_PORT_STAT_CONNECTION))
+ if (hcd->usb_phy && !hdev->parent)
usb_phy_notify_disconnect(hcd->usb_phy, udev->speed);
usb_disconnect(&port_dev->child);
}