[ofa-general] Cannot get MSI-X verctors on RHEL5-up1

[Tziporet Koren]

Hi Doug,

We found that on RHEL5 up1 we do not succeed to get MSI-X vectors with for ConnectX with the mlx4 driver.
Note that on RHEL5 we do get them.

Any help will be appreciated.

Thanks
Tziporet

This is the output of lspci -vv so you can see that the MSI-X is available by the device

13:00.0 InfiniBand: Mellanox Technologies MT25418 [ConnectX IB DDR] (rev a0)
        Subsystem: Mellanox Technologies MT25418 [ConnectX IB DDR]
        Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr+ Stepping- SERR- FastB2B-
        Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR-
        Latency: 0, Cache Line Size: 64 bytes
        Interrupt: pin A routed to IRQ 177
        Region 0: Memory at fdf00000 (64-bit, non-prefetchable) [size=1M]
        Region 2: Memory at f7000000 (64-bit, prefetchable) [size=8M]
        Region 4: Memory at fdef0000 (64-bit, non-prefetchable) [size=8K]
        Capabilities: [40] Power Management version 3
                Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA PME(D0-,D1-,D2-,D3hot-,D3cold-)
                Status: D0 PME-Enable- DSel=0 DScale=0 PME-
        Capabilities: [48] Vital Product Data
        Capabilities: [9c] MSI-X: Enable- Mask- TabSize=256
                Vector table: BAR=4 offset=00000000
                PBA: BAR=4 offset=00001000
        Capabilities: [60] Express Endpoint IRQ 0
                Device: Supported: MaxPayload 256 bytes, PhantFunc 0, ExtTag+
                Device: Latency L0s <64ns, L1 unlimited
                Device: AtnBtn- AtnInd- PwrInd-
                Device: Errors: Correctable- Non-Fatal+ Fatal+ Unsupported-
                Device: RlxdOrd- ExtTag- PhantFunc- AuxPwr- NoSnoop-
                Device: MaxPayload 256 bytes, MaxReadReq 4096 bytes
                Link: Supported Speed 2.5Gb/s, Width x8, ASPM L0s, Port 8
                Link: Latency L0s unlimited, L1 unlimited
                Link: ASPM Disabled RCB 64 bytes CommClk- ExtSynch-
                Link: Speed 2.5Gb/s, Width x8