From: Scott Iveland <siveland@occamnetworks.com>
To: linuxppc-embedded@lists.linuxppc.org
Cc: Dan Malek <dan@mvista.com>
Subject: Re: bug in m8260_mask_and_ack() in Linux/PPC 2.4.x ??
Date: Wed, 25 Oct 2000 12:22:18 -0700 [thread overview]
Message-ID: <39F732EA.8D97C914@occamnetworks.com> (raw)
In-Reply-To: 39F722A9.DC7C7EC0@mvista.com
Dan Malek wrote:
> Murray Jensen wrote:
> >
> > Either I'm going crazy, or this code in m8260_mask_and_ack(),
>
> Yes, it looks wrong to me, too. Now, how in the hell does it work :-)?
> I will immediately fix it in the kernel sources, and once I get 8260
> to build properly again I will test it......
>
> Thanks.
>
> -- Dan
>
We found this bug causes problems when you need to use interrupts from an IRQ
line.
Most internal 8260 devices clear this bit when the interrupt is cleared in the
parameter
ram for that device(e.g. FCCE,FCCM). That is why it worked with the FCC,SMC
etc.
We found and fixed this when we tried to use an IRQ line into the 8260. If you
change it as indicated, it does work properly for things like the external IRQ
line interrupts.
Scott
** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/
prev parent reply other threads:[~2000-10-25 19:22 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2000-10-25 3:32 bug in m8260_mask_and_ack() in Linux/PPC 2.4.x ?? Murray Jensen
2000-10-25 18:12 ` Dan Malek
2000-10-25 19:22 ` Scott Iveland [this message]
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