Messages in this thread | | | Date | Sun, 11 Aug 2013 17:40:24 -0700 | From | Guenter Roeck <> | Subject | Re: SCSI bus failures with qemu-arm in kernel 3.8+ |
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On 08/11/2013 03:04 PM, Russell King - ARM Linux wrote: > On Sun, Aug 11, 2013 at 08:54:43AM -0700, Guenter Roeck wrote: >> Hi, >> >> trying to boot arm versatile images with qemu results in the following error >> if I try to boot with a disk image. >> >> sym0: <895a> rev 0x0 at pci 0000:00:0d.0 irq 92 >> sym0: SCSI BUS has been reset. >> scsi0 : sym-2.2.3 >> [...] >> scsi 0:0:0:0: ABORT operation started >> scsi 0:0:0:0: ABORT operation timed-out. >> [...] >> >> Yocto's 3.8 kernel images work, upstream kernels 3.8 and later fail >> (I did not check if/how earlier kernels are affected). >> >> Tracking this down shows that the problem is known and has been fixed with >> commit 351d1339 (arm: add dummy swizzle for versatile with qemu) in the >> Yocto 3.8 kernel at git://git.yoctoproject.org/linux-yocto-3.8. >> >> Would it be possible to submit this patch for inclusion into affected upstream kernels ? > > It could be that it's qemu's PCI routing is wrong - it's not the first > time that qemu has got something wrong. > > Unfortunately, the PCI routing is totally undocumented, and as I understand > it, there's very few backplanes out there now that finding out their real > routing is virtually impossible. I'm loathed to change it unless someone > can point to a definitive source of information on this. >
Maybe Paul can comment, as he wrote the patch.
If it helps, I tried with qemu 1.4.0 from Ubuntu 13.4, qemu 1.4.0 from Poky 1.4.0-1, and qemu 1.5.2 from the qemu repository.
Copying qemu-devel to increase the audience.
Guenter
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