From: Alan Stern Date: Wed, 21 Dec 2005 22:28:11 +0000 (-0800) Subject: [PATCH] usbcore: allow suspend/resume even if drivers don't support it X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=5a9191ff683ce4ebfd2c6a15e2989f5b1f420321;p=GitHub%2FLineageOS%2FG12%2Fandroid_kernel_amlogic_linux-4.9.git [PATCH] usbcore: allow suspend/resume even if drivers don't support it This patch (as618) changes usbcore to prevent derailing the suspend/resume sequence when a USB driver doesn't include support for it. This is a workaround rather than a true fix; the core needs to be changed so that URB submissions from suspended drivers can be refused and outstanding URBs cancelled. Signed-off-by: Alan Stern Signed-off-by: Greg Kroah-Hartman Signed-off-by: Linus Torvalds --- diff --git a/drivers/usb/core/usb.c b/drivers/usb/core/usb.c index e197ce9353de..e80ef9467825 100644 --- a/drivers/usb/core/usb.c +++ b/drivers/usb/core/usb.c @@ -1432,7 +1432,8 @@ static int usb_generic_suspend(struct device *dev, pm_message_t message) mark_quiesced(intf); } else { // FIXME else if there's no suspend method, disconnect... - dev_warn(dev, "no %s?\n", "suspend"); + dev_warn(dev, "no suspend for driver %s?\n", driver->name); + mark_quiesced(intf); status = 0; } return status; @@ -1460,8 +1461,10 @@ static int usb_generic_resume(struct device *dev) } if ((dev->driver == NULL) || - (dev->driver_data == &usb_generic_driver_data)) + (dev->driver_data == &usb_generic_driver_data)) { + dev->power.power_state.event = PM_EVENT_FREEZE; return 0; + } intf = to_usb_interface(dev); driver = to_usb_driver(dev->driver); @@ -1481,7 +1484,7 @@ static int usb_generic_resume(struct device *dev) mark_quiesced(intf); } } else - dev_warn(dev, "no %s?\n", "resume"); + dev_warn(dev, "no resume for driver %s?\n", driver->name); return 0; }