Re: [REGRESSION] 2.6.24/25: random lockups when accessing external USB harddrive

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From: Stefan Becker
Date: Saturday, June 28, 2008 - 8:39 am

Hi Alan,

ext Alan Stern wrote:

Second try, slightly different tack: no dump_stack() in the _irq() 
functions, but disabled/enabled indication. Plus debugging code added in 
usb_hcd_add() to see the interrupt registration. Again too much data was 
printed for the bug to appear.

Looking at the collected data it looks like

  - ehci_irq() is always entered with interrupts enabled (WRONG).

  - uhci_irq() is entered sometimes with either interrupts enabled 
(WRONG) or disabled (OK).

But both interrupts are registered with IRQF_DISABLED...

Regards,

	Stefan

---
Stefan Becker
E-Mail: Stefan.Becker@nokia.com
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Messages in current thread:
Re: [REGRESSION] 2.6.24/25: random lockups when accessing ..., Stefan Becker, (Sat Jun 28, 8:39 am)
BUG in 2.6.26-rc8 interrupt handling, Becker Stefan (Nokia ..., (Sat Jun 28, 12:34 pm)
Re: BUG in 2.6.26-rc8 interrupt handling, David Brownell, (Sat Jun 28, 12:51 pm)
Re: PATCH: 2.6.26-rc8: Fix IRQF_DISABLED for shared interrupts, Henrique de Moraes H ..., (Mon Jun 30, 7:28 am)
Re: [PATCH] USB: fix interrupt disabling for HCDs with sha ..., Leonardo Chiquitto, (Tue Jul 1, 7:19 am)