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From: john stultz on 7 Jun 2010 23:40
With 2.6.35-rc2 one of my LS21 boxes stopped booting. I'm seeing:

Fusion MPT SAS Host driver 3.04.15
mptsas 0000:03:04.0: can't find IRQ for PCI INT A; probably buggy MP table
mptbase: ioc0: Initiating bringup
ioc0: LSISAS1064 A3: Capabilities={Initiator}
mptbase: ioc0: WARNING - Issuing Reset from mpt_config!!
mptbase: ioc0: Attempting Retry Config request type 0x1, page 0x2, action 0
mptbase: ioc0: WARNING - Issuing Reset from mpt_config!!
mptbase: ioc0: Initiating recovery
mptbase: ioc0: Attempting Retry Config request type 0x1, page 0x2, action 0



Where as 2.6.34 with the same .config boots fine:

Fusion MPT SAS Host driver 3.04.14
mptsas 0000:03:04.0: PCI INT A -> GSI 19 (level, low) -> IRQ 19
mptbase: ioc0: Initiating bringup
ioc0: LSISAS1064 A3: Capabilities={Initiator}
scsi0 : ioc0: LSISAS1064 A3, FwRev=01125400h, Ports=1, MaxQ=511, IRQ=19
mptsas: ioc0: attaching ssp device: fw_channel 0, fw_id 0, phy 0, sas_addr 0x5000c500021cbc49
scsi 0:0:0:0: Direct-Access IBM-ESXS ST973401SS B51D PQ: 0 ANSI: 5
sd 0:0:0:0: Attached scsi generic sg0 type 0
Fusion MPT misc device (ioctl) driver 3.04.14
sd 0:0:0:0: [sda] 143374000 512-byte logical blocks: (73.4 GB/68.3 GiB)
sd 0:0:0:0: [sda] Write Protect is off
sd 0:0:0:0: [sda] Write cache: disabled, read cache: enabled, supports DPO and FUA
mptctl: Registered with Fusion MPT base driver
mptctl: /dev/mptctl @ (major,minor=10,220)
ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver
ACPI: PCI Interrupt Link [LPUS] enabled at IRQ 5
ehci_hcd 0000:00:03.2: PCI INT A -> Link[LPUS] -> GSI 5 (level, low) -> IRQ 5
ehci_hcd 0000:00:03.2: EHCI Host Controller
ehci_hcd 0000:00:03.2: new USB bus registered, assigned bus number 1
sda: sda1 sda2 sda3 sda4
....


Although from the warning, this may be irq routing related, not driver
related. Any suggestions?

thanks
-john



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