Messages in this thread | | | Date | Fri, 9 Dec 2011 14:59:54 +0100 | From | Lothar Waßmann <> | Subject | Re: [PATCH] flexcan: Acknowledge all interrupt sources in the IRQ handler |
| |
Hi,
Marc Kleine-Budde writes: > On 12/09/2011 02:47 PM, Lothar Waßmann wrote: > > Otherwise the handler will get stuck in an endless IRQ loop when an > > interrupt condition occurs that is not being acked (e.g. TWRN) > > On which CPU do you have this problem? > on i.MX28.
> Seems that mx25/35 behave a bit different than mx28. But I had no time > to dig into this, yet. BTW Wolfgang is just reworking error handling, > can you please test his patches he recently posted on linux-can. > The ESR of i.MX25 is completely identical to the i.MX28. You should be able to reproduce the problem when trying to send a message to a CAN interface with the transceiver disabled. You will get a BIT0_ERR and the TWRN bit will be asserted and never cleared leading to an endless interrupt loop.
Lothar Waßmann -- ___________________________________________________________
Ka-Ro electronics GmbH | Pascalstraße 22 | D - 52076 Aachen Phone: +49 2408 1402-0 | Fax: +49 2408 1402-10 Geschäftsführer: Matthias Kaussen Handelsregistereintrag: Amtsgericht Aachen, HRB 4996
www.karo-electronics.de | info@karo-electronics.de ___________________________________________________________ -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |