From: Daniel Barkalow <barkalow@xxxxxxxxxxxx> Date: Mon, 22 Oct 2007 17:31:04 -0400 (EDT) > It's likewise documented (although maybe arguable in wording) that the > device shouldn't send legacy interrupts if MSI is in use, regardless of > INTX_DISABLE, but this also happens in the field. > > I think that the current Linux behavior with respect to INTX_DISABLE is > simply due to which hardware bug was present in the device whose driver > first got Linux support, but one or the other or both needs a quirk, since > there's no behavior that works with everything. And it's still impossible > to tell which bug is more common, since MSI isn't used most of the time, > even if the hardware supports it, so it's pretty arbitrary which way Linux > goes in the non-quirk case. I think this pretty much sums up the situation accurately. My suggestion is: 1) Leave the pci_intx() twiddling code in drivers/pci/msi.c 2) Add quirks for "INTX_DISABLE turns off MSI too", this sets a flag in the pci_dev. 3) The pci_intx() calls in drivers/pci/msi.c are skipped if this flag from #2 is set. 4) Add quirk entries for drivers/net/tg3.c chips and these SATA devices we are learning about here, as well as any others we are aware of right now. 5) Remove the pci_intx() workaround code from drivers/net/tg3.c and elsewhere. - To unsubscribe from this list: send the line "unsubscribe linux-ide" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
