linux-kernel - [BUG?] Interrupts enabled after xen_acpi_processor_resume+0x0/0x34 [xen_acpi

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Message-ID: <20140128150848.GA1428@redhat.com>
Date:	Tue, 28 Jan 2014 16:08:49 +0100
From:	Stanislaw Gruszka <sgruszka@...hat.com>
To:	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>
Cc:	Ben Guthro <benjamin.guthro@...rix.com>,
	linux-kernel@...r.kernel.org, "Rafael J. Wysocki" <rjw@...k.pl>
Subject: [BUG?] Interrupts enabled after xen_acpi_processor_resume+0x0/0x34
 [xen_acpi_processor]

Hi,

We have this bug report on our bugzilla:
https://bugzilla.redhat.com/show_bug.cgi?id=1058268

In short:
WARNING: CPU: 0 PID: 6733 at drivers/base/syscore.c:104 syscore_resume+0x9a/0xe0()
Interrupts enabled after xen_acpi_processor_resume+0x0/0x34 [xen_acpi_processor]

Perhaps I'm wrong, but I think sysops->resume() callback should be
atomic i.e. can not use mutexes or kmalloc(,GFP_KERNEL), what is not
true regarding xen_acpi_processor_resume(). That callback was introduced
by commit 3fac10145b766a2244422788f62dc35978613fd8. Fixing that will
not be easy IMHO, but maybe you have some ideas ? :-)

Stanislaw
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