On Tue, 2010-10-05 at 10:18 -0700, Anirban Chakraborty wrote: > Hi All, > > I am trying to test qlcnic driver (for 10Gb QLogic network adapter) on a > Power 6 system > (IBM P 520, System type 8203) with upstream kernel and I do see that the > kernel is > not able to allocate any MSI-X vectors. The driver requests for 4 vectors in > pci_enable_msix, > which returns 2.
OK, that's the platform code saying it can only support 2, that seems low, but it's possible. > The driver again attempts, this time for 2 vectors but the kernel can't > allocate > and it returns a value of 0xfffffffd. OK, that's odd. That is -3, which AFAICS we don't return from the linux code. So it must be coming from firmware? In which case it would be "parameter error". > I upgraded the system FW to 01EL350 (from 01EL340) just to make sure > if MSI-X is enabled in the system. Is that the latest FW version? Adding #define DEBUG at the top of arch/powerpc/platforms/pseries/msi.c will give us lots of useful info. Or you can enable CONFIG_DYNAMIC_DEBUG, and enable it that way. cheers
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