Hi Jeff,
I've been including the promise-sata-pata patch in the Gentoo kernel for
quite a while, taken directly from the git branch. The most recent
incarnations of this patch have stopped working, causing an oops on
bootup. This has been reproduced with unmodified 2.6.19-rc2 plus the patch.
Unable to handle kernel NULL pointer dereference at 0
RIP: pdc_sata_scr_read+0x3e
Trace:
sata_scr_read
ata_device_add
process_timeout
pdc_ata_init_one
pci_device_probe
driver_probe_device
http://weather.ou.edu/~sarms/panic3.jpeg
We added the following printk to pdc_sata_scr_read:
printk("pdc_sata_scr_read ap=%p scr_addr %ld sc_reg %d\n", ap,
ap->ioaddr.scr_addr, sc_reg);
And the output is:
pdc_sata_src_read ap=ffff8100bfce0498 src_addr -68169720896256 sc_reg 2
pdc_sata_src_read ap=ffff8100bfce0498 src_addr -68169720896256 sc_reg 0
pdc_sata_src_read ap=ffff8100bfce0498 src_addr -68169720896256 sc_reg 0
pdc_sata_src_read ap=ffff8100bfce0498 src_addr -68169720896256 sc_reg 2
pdc_sata_src_read ap=ffff8100bfce0498 src_addr -68169720896256 sc_reg 0
ata2: SATA link down (SStatus 0 SControl 300)
pdc_sata_src_read ap=ffff8100bfce0498 src_addr -68169720896256 sc_reg 0
pdc_sata_src_read ap=ffff8100bfd08498 src_addr 0 sc_reg 2
Unable to handle kernel NULL pointer dereference
See http://weather.ou.edu/~sarms/panic4.jpeg
Bug report is at http://bugs.gentoo.org/148059
Any ideas? Should we file this on the kernel bugzilla?
Thanks!
Daniel
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