RE: Upgrade to 2.6.26 results in Oops during request_irq

From: Sparks, Sam
Sent: Thursday, April 08, 2010 4:15 PM

Howdy All,

I have (almost) successfully upgraded from Linux 2.6.22 to 2.6.26 (both
downloaded from debian) on my mpc8347 powerpc, but I think I may be
missing a required change to my dts regarding the IPIC or maybe a

change

in how my driver requests IRQs.

I have several modules that are maintained outside the kernel tree, and
all but one is working correctly. The offending driver is attempting to
register IRQ 23, and is accessing an invalid memory location. I am
currently getting the following stack dump:

Aha! I have found that change that caused my module to break:
http://www.mail-archive.com/linuxppc-dev@lists.ozlabs.org/msg09748.html

This patch modified ipic_set_irq_type to override the handle_irq
function pointer.

Do I need to register a new function to handle falling edge triggered
external interrupts? It appears the default is NULL.

--Sam