Messages in this thread |  | | Date | Sat, 22 Mar 2008 19:27:50 +0100 | From | Stefan Richter <> | Subject | Re: ohci1394 problem (MMIO broken) (was 2.6.25-rc6-git6: Reported regressions from 2.6.24) |
| |
Thomas Meyer wrote: > Stefan Richter schrieb: >> - Several or all of ohci1394's MMIO reads return ~0 (all bits set >> to one) --- or 0 --- where different values are expected. >> >> - In http://lkml.org/lkml/2008/2/23/244 we get to see a >> WARNING: at arch/x86/mm/ioremap.c:137 __ioremap+0xa7/0x16a() >> which is "WARN_ON_ONCE(page_is_ram(pfn));". >> After that, the failures start. >> But before that, "Unknown symbol" messages pop up when ohci1394 >> is loaded. These symbols are implemented by ieee1394 on which >> ohci1394 depends. ... >> Thomas, you wrote in http://lkml.org/lkml/2008/3/17/316 that the >> problem resurfaced. >> - Are the "Unknown symbol"s still there? These are not supposed to >> happen. > No. (See explanation above). >> - Is the "WARNING: at arch/x86/mm/ioremap.c" still there? > No. I couldn't reproduce this warning, yet. > >> - Can you reproduce it without the atheros driver? > Yes. > > See http://bugzilla.kernel.org/show_bug.cgi?id=10080.
Thanks. Summary from today's bugzilla comments: No ioremap warning, but MMIO reads still give bogus values and let ohci1394 fail. ohci1394 still got the MMIO region 0x1'0000'0000 - 0x1'0000'07ff, FWIW. The length of the region is correct, but its contents bogus. -- Stefan Richter -=====-==--- --== =-==- http://arcgraph.de/sr/
|  |