Bjorn Helgaas wrote:
On Wednesday 07 June 2006 17:11, Bjorn Helgaas wrote:
Something changed between 2.6.17-rc5-mm2 and -mm3 that broke tg3
on my HP DL360:
and the specific change that broke it seems to be:
gregkh-pci-pci-ignore-pre-set-64-bit-bars-on-32-bit-platforms.patch.
pci_read: 0000:01:02.0 reg 0x10 len 4 val 0xf7ef0004
pci_write: 0000:01:02.0 reg 0x10 len 4 val 0xffffffff
pci_read: 0000:01:02.0 reg 0x10 len 4 val 0xffff0004
pci_write: 0000:01:02.0 reg 0x10 len 4 val 0xf7ef0004
pci_read: 0000:01:02.0 reg 0x14 len 4 val 0x0000
pci_write: 0000:01:02.0 reg 0x14 len 4 val 0xffffffff
pci_read: 0000:01:02.0 reg 0x14 len 4 val 0xffffffff
pci_write: 0000:01:02.0 reg 0x14 len 4 val 0x0000
... this is a 64-bit BAR preset with a 16-bit mask, preset
to the valid 32-bit address 0x0000_0000_f7ef_0000.
pci_write: 0000:01:02.0 reg 0x10 len 4 val 0x0004 <=== looks questionable
pci_write: 0000:01:02.0 reg 0x14 len 4 val 0x0000
... here the algorithm thinks the addrss is above 4 GB and disables it.
It should re-enable it when the device is turned back on, though; if
it doesn't that's very strange.
Anyway, the error seems to be that the line:
+ } else if (l) {
... should be ...
+ } else if (lhi) {
... since l contains the lower half of the pre-set address at that
point, and lhi is the upper half.
-hpa
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