Re: Recent usb changes cause panic when umass removed

[Paul Goyette <paul%whooppee.com@localhost>]

On Sat, 28 May 2011, Paul Goyette wrote:

> I've updated a couple of my machines to -current built from sources of 
> 14:05:30 UTC.  Part of my update sequence is to attach an external USB hard 
> drive and dump the root file system.
>
> On both machines, I get a kernel panic upon removing the external USB hard 
> drive.  The first machine I didn't catch (still had xdm running), but on the 
> second machine I got the following backtrace:
>
>         ehci_free + 0x17
>         usbd_free_xfer + 0x2a
>         umass_disco + 0x56
>         umass_detach + 0xe5
>         config_detach + 0x90
>         usb_disconnect_port + 0xa3
>         uhub_explore + 0x16f
>         usb_discover + 0x31
>         usb_event_thread + 0x3e

Confirmed fixed by:

> Module Name:    src
> Committed By:   tsutsui
> Date:           Sat May 28 15:47:17 UTC 2011
>
> Modified Files:
>         src/sys/dev/usb: ehci.c ohci.c ohcivar.h uhci.c
>
> Log Message:
> Revert changes for PR kern/44907
> http://mail-index.NetBSD.org/source-changes/2011/05/27/msg022584.html
> for now.  It might cause a panic in ehci_freex() on device detach
> as reported by Paul Goyette on current-users@.


Thanks for quick action!



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