Bug#670398: Deadlock in hid_reset when Dell iDRAC is reset

[<Shyam_Iyer@Dell.com>]

> -----Original Message-----
> From: Sven Hoexter [mailto:sven@timegate.de]
> Sent: Tuesday, May 15, 2012 5:46 AM
> To: Iyer, Shyam
> Cc: ben@decadent.org.uk; sven@timegate.de; 670398@bugs.debian.org;
> Hayes, Stuart
> Subject: Re: Deadlock in hid_reset when Dell iDRAC is reset
> 
> On Tue, May 01, 2012 at 10:15:37AM +0530, Shyam_Iyer@Dell.com wrote:
> 
> Hi,
> 
> > Was the usb reset issue found while resetting the iDRAC ?
> >
> > Resetting the iDRAC is an out of band process and has to be issued
> via a separate management network to the iDRAC.
> 
> I found the time to test this issue in several OS-Hardware
> combinations:
> 
> R210 Squeeze -> hangs
> R210 Ubuntu 10.04 -> recovers (to my surprise)
> 
> R210 II Squeeze -> hangs
> R210 II Ubuntu 10.04 -> hangs
> R210 II CentOS 6.1 -> hangs (expected, just tried that to be sure)
> 
> R710 Squeeze -> not effected
> 
> Sven
> 

We have observed that doing a reset on idrac on low-end server like R|T210 R|T310 triggers the panic whereas the high end servers do not deadlock on an iDRAC reset so we know that this timing dependent.

Ben - I had attached the patch to the earlier thread. Let me know if you need any additional work from me on this.