netdev - RE: [PATCH] [net][bna] Fix call trace when interrupts are disabled while sleeping function kzalloc is called

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Date:	Tue, 28 Jun 2011 11:48:26 -0700
From:	<Shyam_Iyer@...l.com>
To:	<rmody@...cade.com>, <davem@...emloft.net>,
	<shyam.iyer.t@...il.com>
CC:	<netdev@...r.kernel.org>, <ddutt@...cade.COM>, <huangj@...cade.COM>
Subject: RE: [PATCH] [net][bna] Fix call trace when interrupts are disabled
 while sleeping function kzalloc is called



> -----Original Message-----
> From: Rasesh Mody [mailto:rmody@...cade.com]
> Sent: Tuesday, June 28, 2011 1:28 PM
> To: Iyer, Shyam; davem@...emloft.net; shyam.iyer.t@...il.com
> Cc: netdev@...r.kernel.org; Debashis Dutt; Jing Huang
> Subject: RE: [PATCH] [net][bna] Fix call trace when interrupts are
> disabled while sleeping function kzalloc is called
> 
> >From: Shyam_Iyer@...l.com [mailto:Shyam_Iyer@...l.com]
> >Sent: Tuesday, June 28, 2011 9:30 AM
> >
> >Here is try 2.
> >
> >I found that I had to initialize the flags variable outside the
> >spin_lock_irqsave in the following way to fix the problem. The
> sleeping
> >kzalloc function is in fact in the request_threaded_irq call which
> >allocates the irq handler function and its flags arguments.
> >
> >Attached patch fixes the issue.
> 
> The attached patch may fix the issue in MSIX mode, however we'll
> continue to see the issue in INTX mode. Using a separate irq_flags may
> be a good idea.

You are right.. Resending another version.
-Shyam
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