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authorStanislaw Gruszka <sgruszka@redhat.com>2014-02-26 10:30:30 (GMT)
committerDavid Vrabel <david.vrabel@citrix.com>2014-03-18 14:40:20 (GMT)
commitcd979883b9ede90643e019f33cb317933eb867b4 (patch)
treee98a9654826b2396f7b01b65300c0a68946b9e33 /README
parent1429d46df4c538d28460d0b493997006a62a1093 (diff)
downloadlinux-cd979883b9ede90643e019f33cb317933eb867b4.tar.xz
xen/acpi-processor: fix enabling interrupts on syscore_resume
syscore->resume() callback is expected to do not enable interrupts, it generates warning like below otherwise: [ 9386.365390] WARNING: CPU: 0 PID: 6733 at drivers/base/syscore.c:104 syscore_resume+0x9a/0xe0() [ 9386.365403] Interrupts enabled after xen_acpi_processor_resume+0x0/0x34 [xen_acpi_processor] ... [ 9386.365429] Call Trace: [ 9386.365434] [<ffffffff81667a8b>] dump_stack+0x45/0x56 [ 9386.365437] [<ffffffff8106921d>] warn_slowpath_common+0x7d/0xa0 [ 9386.365439] [<ffffffff8106928c>] warn_slowpath_fmt+0x4c/0x50 [ 9386.365442] [<ffffffffa0261bb0>] ? xen_upload_processor_pm_data+0x300/0x300 [xen_acpi_processor] [ 9386.365443] [<ffffffff814055fa>] syscore_resume+0x9a/0xe0 [ 9386.365445] [<ffffffff810aef42>] suspend_devices_and_enter+0x402/0x470 [ 9386.365447] [<ffffffff810af128>] pm_suspend+0x178/0x260 On xen_acpi_processor_resume() we call various procedures, which are non atomic and can enable interrupts. To prevent the issue introduce separate resume notify called after we enable interrupts on resume and before we call other drivers resume callbacks. Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
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