Quad Mac Pro: ohci-1394 with udev hangs for kernels after 2.6.15

Quad Mac Pro: ohci-1394 with udev hangs for kernels after 2.6.15

[J. Hart]

I notice that the ohci-1394 driver does not seem to work with udev in 
kernels after  2.6.15.   It is functional in 2.6.15, but causes the boot 
process to hang with every kernel afterwards up to 2.6.19-rc5. 

I have found out that the hang occurs inside the /etc/init.d/udev script 
when it is called via the /etc/rcS.d/S10udev link at boot.  The hang 
actually occurs in the /sbin/udevplug utility when it is invoked in the 
udev script, and only happens when ohci1394 support is configured as 
part of a kernel build.  This appears to occur whether ohci1394 support 
is built into the kernel, or configured as a module.   I am told that 
there have been no "substantial" changes in ohci-1394 between 2.6.15 and 
the present.

I am trying this on a quad Mac on which I am presently running a 
2.6.19-rc5 kernel without any other difficulty.
I did have to patch the ahci and ata_piix drivers for pci_device_id 
conflicts, and I have to use the "irqpoll" kernel argument in order to 
function at all, but it seems to be quite stable without the ohci1394 
driver.

It is difficult to provide dmesg output from the boot, since the system 
locks up at boot if the ohci-1394 driver is used.

If anyone familiar with the ohci-1394 driver or udev has any ideas for 
me to check out, I'll be happy to try.

J. Hart


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