I just got SATA working on Marvell. After fixing a bunch of issues in
the driver, the final issue was lack of interrupts. Disabling
CONFIG_PCI_MSI solved that, and suddenly the driver was working quite
nicely.
The general problem is that pci_enable_msi() is not failing, on systems
that do not support MSI. This leads to Infiniband, tg3, and other
drivers working around this problem by including an MSI-interrupts-work
test during probe.
Perhaps its because I like leading edge stuff, and am playing with
drivers for PCI MSI hardware, but it seems like I am running into this
pci_enable_msi()-doesnt-fail problem more and more frequently. First
tg3, then AHCI, now sata_mv.
What needs to be done, to detect working PCI message signalled
interrupts such that pci_enable_msi() fails properly?
Thanks,
Jeff
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