Bug 36742 - Fusion MPT2SAS driver fails to suspend to S3 incorrectly, suspend to disk works.
Summary: Fusion MPT2SAS driver fails to suspend to S3 incorrectly, suspend to disk works.
Status: RESOLVED OBSOLETE
Alias: None
Product: SCSI Drivers
Classification: Unclassified
Component: Other (show other bugs)
Hardware: All Linux
: P1 normal
Assignee: scsi_drivers-other
URL:
Keywords:
Depends on:
Blocks: 7216
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Reported: 2011-06-05 23:54 UTC by devsk
Modified: 2013-12-23 13:43 UTC (History)
2 users (show)

See Also:
Kernel Version: 2.6.38.8
Subsystem:
Regression: No
Bisected commit-id:

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Description devsk 2011-06-05 23:54:20 UTC 
The configurations:

# lspci|grep LSI
04:00.0 Serial Attached SCSI controller: LSI Logic / Symbios Logic SAS2008 PCI-Express Fusion-MPT SAS-2 [Falcon] (rev 03)

# dmesg|grep sas
[    1.975000] megasas: 00.00.05.29-rc1 Tue. Dec. 7 17:00:00 PDT 2010
[    3.880000] mpt2sas version 07.100.00.00 loaded
[    3.881000] mpt2sas 0000:04:00.0: PCI INT A -> GSI 16 (level, low) -> IRQ 16
[    3.881000] mpt2sas 0000:04:00.0: setting latency timer to 64
[    3.881000] mpt2sas0: 64 BIT PCI BUS DMA ADDRESSING SUPPORTED, total mem (12298180 kB)
[    3.881000] mpt2sas 0000:04:00.0: irq 44 for MSI/MSI-X
[    3.881000] mpt2sas0: PCI-MSI-X enabled: IRQ 44
[    3.881000] mpt2sas0: iomem(0x00000000f3dfc000), mapped(0xffffc900100f0000), size(16384)
[    3.881000] mpt2sas0: ioport(0x000000000000ce00), size(256)
[    3.953000] mpt2sas0: sending diag reset !!
[    5.033000] mpt2sas0: diag reset: SUCCESS
[    5.073000] mpt2sas0: Allocated physical memory: size(3971 kB)
[    5.073000] mpt2sas0: Current Controller Queue Depth(1739), Max Controller Queue Depth(2000)
[    5.073000] mpt2sas0: Scatter Gather Elements per IO(128)
[    5.132000] mpt2sas0: LSISAS2008: FWVersion(09.00.00.00), ChipRevision(0x03), BiosVersion(07.17.00.00)
[    5.132000] mpt2sas0: Protocol=(Initiator,Target), Capabilities=(Raid,TLR,EEDP,Snapshot Buffer,Diag Trace Buffer,Task Set Full,NCQ)
[    5.132000] mpt2sas0: sending port enable !!
[    6.703000] mpt2sas0: host_add: handle(0x0001), sas_addr(0x500605b0035b5e30), phys(8)
[   12.575000] mpt2sas0: port enable: SUCCESS
[   12.579000] scsi 6:0:0:0: SATA: handle(0x000a), sas_addr(0x4433221102000000), phy(2), device_name(0x4ee25001e1075a3b)
[   12.583000] scsi 6:0:1:0: SATA: handle(0x0009), sas_addr(0x4433221103000000), phy(3), device_name(0xc5005000295b10aa)
[   12.586000] scsi 6:0:2:0: SATA: handle(0x000b), sas_addr(0x4433221101000000), phy(1), device_name(0xc50050001ca510a2)
[   12.587000] scsi 6:0:3:0: SATA: handle(0x000c), sas_addr(0x4433221100000000), phy(0), device_name(0x0751500a2ac80305)

The drive is an SSD device in Unconfigured state on port 4 of the LSI 9211-8i HBA.

Symptoms:

1. Without the LSI 9211-8i card in, pm-suspend suspends the machine to S3 and powering on the system resumes fine.
2. With the card in and the drive on it, pm-suspend seems to suspend but when I try to resume, it just does a regular power on.
3. With the Windows XP on dual boot setup on the same drive in another partition, I suspend to S3 and it resumes fine, with and without the card.

This combination points to mpt2sas driver being the culprit.

Let me know what additional information you need.
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