[PATCH v2] i.MX31 and i.MX35 : fix errate TLSbo65953 and ENGcm09472

Uwe Kleine-König u.kleine-koenig at pengutronix.de
Tue Oct 5 16:04:14 EDT 2010

Hello Eric,

>> Hmm, when the caches are off before entering wfi, does that mean that
>> all interrupt (and fiq) handlers run with the caches off, too?  That's
>> very bad, isn't it?
> If I understand well, this case happens only when they run after WFI  
> which means cpuidle was called (and thus CPU activity was null for a  
> certain amount of time, which explains why it's easier to reproduce the  
> problem with tslib than with qtdemo which takes 100% CPU and don't let  
> cpuidle to execute very often).
> That may seems bad, but I find this solution better than having an oops  
> after a few IRQs which makes the CPU unusable for real life applications 
> :-)
Ack, but it makes me think if the caches should be enabled in the irq
entry point, too.

Best regards

Pengutronix e.K.                           | Uwe Kleine-König            |
Industrial Linux Solutions                 | http://www.pengutronix.de/  |

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