Hi, On 03/25/2016 03:39 PM, Lipengcheng wrote: > Hi, > Thanks Baolu very much! > The kernel is 3.10.Before the problem is inevitable emergence. But we fix patch number:b630d4b9d05ba2e66878ca4614946d0f950d4111 and your suggest. > Then we resume and suspend the seventh and it is ok only if the usb3 can not work. So the changes are effective. Thanks for testing. > In the wrong state which the usb3 can not work, we continue to suspend and resume. It will be core dump. Should it be a normal phenomenon? dpm_run_callback(): platform_pm_resume+0x0/0x5c returns -12 PM: Device hiusb-xhci.0 failed to resume: error -12 Your xHCI host controller failed to resume. As the result, your usb3 devices should not work. You couldn't suspend it once more either. Best Regards, Baolu -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html