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| author | Stanislaw Gruszka <sgruszka@redhat.com> | 2014-02-26 14:30:30 +0400 |
|---|---|---|
| committer | David Vrabel <david.vrabel@citrix.com> | 2014-03-18 18:40:20 +0400 |
| commit | cd979883b9ede90643e019f33cb317933eb867b4 (patch) | |
| tree | e98a9654826b2396f7b01b65300c0a68946b9e33 /include | |
| parent | 1429d46df4c538d28460d0b493997006a62a1093 (diff) | |
| download | linux-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>
Diffstat (limited to 'include')
| -rw-r--r-- | include/xen/xen-ops.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/include/xen/xen-ops.h b/include/xen/xen-ops.h index fb2ea8f26552..2cf47175b12b 100644 --- a/include/xen/xen-ops.h +++ b/include/xen/xen-ops.h @@ -2,6 +2,7 @@ #define INCLUDE_XEN_OPS_H #include <linux/percpu.h> +#include <linux/notifier.h> #include <asm/xen/interface.h> DECLARE_PER_CPU(struct vcpu_info *, xen_vcpu); @@ -16,6 +17,9 @@ void xen_mm_unpin_all(void); void xen_timer_resume(void); void xen_arch_resume(void); +void xen_resume_notifier_register(struct notifier_block *nb); +void xen_resume_notifier_unregister(struct notifier_block *nb); + int xen_setup_shutdown_event(void); extern unsigned long *xen_contiguous_bitmap; |