On Saturday, November 12, 2011, Rafael J. Wysocki wrote:
If that's "acpi_idle", the appended patch should help (it works for
me at least).
I currently have limited email connectivity but I happened to bisect the
same bug and your patch fixes it for me. I am certainly on acpi_idle
with my thinkpad w500.
Sorry for breaking the email threading and dropping people from Cc.
From: Rafael J. Wysocki <firstname.lastname@example.org>
Subject: ACPI / cpuidle: Remove acpi_idle_suspend (to fix suspend regression)
After commit e978aa7d7d57d04eb5f88a7507c4fb98577def77 (cpuidle: Move
dev->last_residency update to driver enter routine; remove
dev->last_state) setting acpi_idle_suspend to 1 by
acpi_processor_suspend() causes the ACPI cpuidle routines to return
error codes continuously, which in turn causes cpuidle to lock up
(hard). However, acpi_idle_suspend doesn't appear to be useful for
any purpose (it's racy and doesn't really provide any real
protection), so it can be removed, which makes the problem go away.
Signed-off-by: Rafael J. Wysocki <email@example.com>
Tested-by: Arnd Bergmann <firstname.lastname@example.org>
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