diff options
| author | Zhuang Jin Can <jin.can.zhuang@intel.com> | 2015-01-26 18:30:39 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2015-02-04 02:28:32 +0300 |
| commit | 7671bd1e97b9fa09aea69e76375ada9534c735a3 (patch) | |
| tree | 27fa0ad57c58bb3c7497b473957dbaab4f20a59b /drivers/usb/core | |
| parent | 673016d9f7f7a92636cb83ee1120deaa66269322 (diff) | |
| download | linux-7671bd1e97b9fa09aea69e76375ada9534c735a3.tar.xz | |
Revert "usb: Reset USB-3 devices on USB-3 link bounce"
This revert a82b76f7fa6154e8ab2d8071842a3e38b9c0d0ff.
The commit causes an extra reset in remote wakeup as described in:
http://www.spinics.net/lists/linux-usb/msg119080.html
Signed-off-by: Zhuang Jin Can <jin.can.zhuang@intel.com>
Acked-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb/core')
| -rw-r--r-- | drivers/usb/core/hub.c | 34 |
1 files changed, 9 insertions, 25 deletions
diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c index 3e9c4d477d1a..4c259aca7a62 100644 --- a/drivers/usb/core/hub.c +++ b/drivers/usb/core/hub.c @@ -4886,7 +4886,7 @@ static void hub_port_connect_change(struct usb_hub *hub, int port1, static void port_event(struct usb_hub *hub, int port1) __must_hold(&port_dev->status_lock) { - int connect_change, reset_device = 0; + int connect_change; struct usb_port *port_dev = hub->ports[port1 - 1]; struct usb_device *udev = port_dev->child; struct usb_device *hdev = hub->hdev; @@ -4974,30 +4974,14 @@ static void port_event(struct usb_hub *hub, int port1) if (hub_port_reset(hub, port1, NULL, HUB_BH_RESET_TIME, true) < 0) hub_port_disable(hub, port1, 1); - } else - reset_device = 1; - } - - /* - * On disconnect USB3 protocol ports transit from U0 to - * SS.Inactive to Rx.Detect. If this happens a warm- - * reset is not needed, but a (re)connect may happen - * before hub_wq runs and sees the disconnect, and the - * device may be an unknown state. - * - * If the port went through SS.Inactive without hub_wq - * seeing it the C_LINK_STATE change flag will be set, - * and we reset the dev to put it in a known state. - */ - if (reset_device || (udev && hub_is_superspeed(hub->hdev) - && (portchange & USB_PORT_STAT_C_LINK_STATE) - && (portstatus & USB_PORT_STAT_CONNECTION))) { - usb_unlock_port(port_dev); - usb_lock_device(udev); - usb_reset_device(udev); - usb_unlock_device(udev); - usb_lock_port(port_dev); - connect_change = 0; + } else { + usb_unlock_port(port_dev); + usb_lock_device(udev); + usb_reset_device(udev); + usb_unlock_device(udev); + usb_lock_port(port_dev); + connect_change = 0; + } } if (connect_change) |