Ack: [Precise][SRU][PATCH 0/1] Bug #972723 - Issue with ite_cir driver

Seth Forshee seth.forshee at canonical.com
Wed Apr 18 19:31:31 UTC 2012


On Wed, Apr 18, 2012 at 08:09:16PM +0100, Luis Henriques wrote:
> BugLink: http://bugs.launchpad.net/bugs/974664
> 
> == Precise SRU Justification ==
> 
> A bug in the upstream ite_cir driver has been triggered recently on Precise
> kernels, causing some systems (in particular Dell XPS 1340) to crash during
> boot.
> 
> The problem is related to an early registration of an ISR during the device
> probe process.  This caused IRQs to be served before the driver initialisation
> had been completed.
> 
> == Fix ==
> 
> Moving the invocation of request_irq() later in the probe solved the problem.

The driver shouldn't be calling request_irq() until it's ready to
service interrupts, so this looks correct.

Acked-by: Seth Forshee <seth.forshee at canonical.com>

> 
> == Impact ==
> 
> There are several users reporting the crash in their system while booting with
> recent Precise kernels.
> 
> == Test Case ==
> 
> Just booting triggers the problem.
> 
> Luis Henriques (1):
>   ite-cir: postpone ISR registration
> 
>  drivers/media/rc/ite-cir.c |    8 ++++----
>  1 file changed, 4 insertions(+), 4 deletions(-)
> 
> -- 
> 1.7.9.5
> 
> 
> -- 
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