From 0c487206fe925ef370e1fc092003efb74ad57410 Mon Sep 17 00:00:00 2001 From: Oliver Neukum Date: Mon, 19 Oct 2009 13:19:41 +0200 Subject: [PATCH] USB: improved error handling in usb_port_suspend() usb: better error handling in usb_port_suspend - disable remote wakeup only if it was enabled - refuse to autosuspend if remote wakeup fails to be enabled Signed-off-by: Oliver Neukum Cc: Alan Stern Signed-off-by: Greg Kroah-Hartman --- drivers/usb/core/hub.c | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-) diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c index 0f857e6..2ac1150 100644 --- a/drivers/usb/core/hub.c +++ b/drivers/usb/core/hub.c @@ -2123,9 +2123,13 @@ int usb_port_suspend(struct usb_device *udev, pm_message_t msg) USB_DEVICE_REMOTE_WAKEUP, 0, NULL, 0, USB_CTRL_SET_TIMEOUT); - if (status) + if (status) { dev_dbg(&udev->dev, "won't remote wakeup, status %d\n", status); + /* bail if autosuspend is requested */ + if (msg.event & PM_EVENT_AUTO) + return status; + } } /* see 7.1.7.6 */ @@ -2134,7 +2138,8 @@ int usb_port_suspend(struct usb_device *udev, pm_message_t msg) dev_dbg(hub->intfdev, "can't suspend port %d, status %d\n", port1, status); /* paranoia: "should not happen" */ - (void) usb_control_msg(udev, usb_sndctrlpipe(udev, 0), + if (udev->do_remote_wakeup) + (void) usb_control_msg(udev, usb_sndctrlpipe(udev, 0), USB_REQ_CLEAR_FEATURE, USB_RECIP_DEVICE, USB_DEVICE_REMOTE_WAKEUP, 0, NULL, 0, -- 2.7.4