[Bugme-new] [Bug 41832] New: sata hotplug doesn't work on ports where link_power_management_policy=min_power

bugzilla-daemon at bugzilla.kernel.org bugzilla-daemon at bugzilla.kernel.org
Sun Aug 28 00:58:44 PDT 2011


https://bugzilla.kernel.org/show_bug.cgi?id=41832

           Summary: sata hotplug doesn't work on ports where
                    link_power_management_policy=min_power
           Product: IO/Storage
           Version: 2.5
    Kernel Version: 3.0.3
          Platform: All
        OS/Version: Linux
              Tree: Mainline
            Status: NEW
          Severity: normal
          Priority: P1
         Component: Serial ATA
        AssignedTo: jgarzik at pobox.com
        ReportedBy: tcl_de at gmx.net
        Regression: Yes


I recently upgraded to kernel 3.0.3 (from 2.6.38) and noticed that after the
upgrade sata hotplug doesn't work any more after I have set the port's
link_power_management_policy to min_power. After setting
link_power_management_policy back to max_performance hotplug still keeps not
working.
But sata hotplug works if I never set the policy to min_power.

I looked through recent libata commits and found out that I can make sata
hotplug work regardless of the link power management policy state again by
reverting
http://git.kernel.org/?p=linux/kernel/git/stable/linux-3.0.y.git;a=commit;h=8a745f1f39b7a20047a362b67ce9151c07d14440

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