USB ehci suspend and resume

USB ehci suspend and resume

[Allen_Lee-uiv9WLrdKoDQT0dZR+AlfA]

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Dear all:
       My kernel is linux-2.4.20 and I want to make USB EHCI suspend from D0
to D3
and resume from D3 to D0. I follow the procedure of Intel data sheet
"29865602.pdf".
My test is as follow:
   My test hardware is a "USB hard disk"(USB 2.0 device)
TEST1
1.      mount /dev/sda1 /mnt/usb
2.      ehci D3
3.      ehci D0
4.      cp /mnt/usb/XXX /tmp/.
    After a few seconds, machine will hang
TEST2
1.      ehci D3
2.      ehci D0
3.      mount /dev/sda1 /mnt/usb
    it never mounts successfully.......
Does It seem that resume will have problem or not?
Does anyone have experience in this and can share something?
Best Regards,
Allen
 

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Re: USB ehci suspend and resume

[Greg KH]

On Fri, Jun 13, 2003 at 05:50:53PM +0800, Allen_Lee-uiv9WLrdKoDQT0dZR+AlfA@public.gmane.org wrote:
> Dear all:
>        My kernel is linux-2.4.20 and I want to make USB EHCI suspend from D0
> to D3

The ehci driver in 2.4.20 is quite old.  Please try this on 2.4.21, or
ideally, 2.5.

thanks,

greg k-h


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