On Fri, 26 Mar 2010, Sriram V wrote:
> I tried the following:
>
> 1) Added a Quirk for the root-hub for ehci host controller
> { USB_DEVICE(0x1d6b, 0x0002), .driver_info = USB_QUIRK_RESET_RESUME },
>
> 2) In suspend - I put PHY in reset by doing a making USB_PHY_RESET_GPIO = 0.
> 3) In resume - I bring PHY out of reset in resume by doing a
> USB_PHY_RESET_GPIO = 1.
>
> But, I still get the following prints and the devices get
> re-enumerated and i am able to access them after resume.
> pm_op(): usb_dev_resume+0x0/0x18 returns -19
> PM: Device 1-2.1 failed to resume: error -19
>
> I also tried doing a reset for the hub and i get the same result.
> Trying to figure out what is happening and why this error occurs.
It would help to see a dmesg log showing the suspend and resume from a
kernel built with CONFIG_USB_DEBUG enabled.
Alan Stern
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