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    Subject[PATCH 2/4] PM: Do not destroy/create devices while suspended in msr.c (rev. 2)
    Date
    From: Rafael J. Wysocki <rjw@sisk.pl>

    The MSR driver should not attempt to destroy/create a device while
    suspended, unless this device corresponds to a nonboot CPU that
    failed to go online during a resume, in which case the PM core should
    be asked to remove it.

    Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
    ---
    arch/x86/kernel/msr.c | 6 +++---
    1 file changed, 3 insertions(+), 3 deletions(-)

    Index: linux-2.6/arch/x86/kernel/msr.c
    ===================================================================
    --- linux-2.6.orig/arch/x86/kernel/msr.c
    +++ linux-2.6/arch/x86/kernel/msr.c
    @@ -155,15 +155,15 @@ static int __cpuinit msr_class_cpu_callb

    switch (action) {
    case CPU_UP_PREPARE:
    - case CPU_UP_PREPARE_FROZEN:
    err = msr_device_create(cpu);
    break;
    case CPU_UP_CANCELED:
    - case CPU_UP_CANCELED_FROZEN:
    case CPU_DEAD:
    - case CPU_DEAD_FROZEN:
    msr_device_destroy(cpu);
    break;
    + case CPU_UP_CANCELED_FROZEN:
    + destroy_suspended_device(msr_class, MKDEV(MSR_MAJOR, cpu));
    + break;
    }
    return err ? NOTIFY_BAD : NOTIFY_OK;
    }


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