linux-kernel - USB_SUSPEND needs SUSPEND?

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Message-ID: <4723D100.5050209@student.tuwien.ac.at>
Date:	Sun, 28 Oct 2007 02:00:00 +0200
From:	Oliver Martin <oliver.martin@...dent.tuwien.ac.at>
To:	linux-kernel@...r.kernel.org
CC:	Oliver Martin <oliver.martin@...dent.tuwien.ac.at>
Subject: USB_SUSPEND needs SUSPEND?

Hello,

it seems that there is some dependency missing for CONFIG_USB_SUSPEND.
When I compile a kernel without CONFIG_SUSPEND, USB suspend doesn't work
(or at least doesn't expose its interface to userspace).
/sys/bus/usb/devices/.../power doesn't exist, but it is there when I
enable CONFIG_SUSPEND. So should CONFIG_USB_SUSPEND depend on
CONFIG_SUSPEND (or something selected by CONFIG_SUSPEND)?

diff between the two configs follows, full config and dmesg for both
kernels is available at http://stud4.tuwien.ac.at/~e0626486/usb_suspend/
(though the dmesg diff doesn't seem to be all that interesting).

--- /boot/config-2.6.23.1-nosuspend
+++ /boot/config-2.6.23.1-suspend
@@ -1,7 +1,7 @@
 #
 # Automatically generated make config: don't edit
 # Linux kernel version: 2.6.23.1
-# Sat Oct 27 23:59:11 2007
+# Sat Oct 27 22:45:27 2007
 #
 CONFIG_X86_32=y
 CONFIG_GENERIC_TIME=y
@@ -30,7 +30,7 @@
 CONFIG_EXPERIMENTAL=y
 CONFIG_BROKEN_ON_SMP=y
 CONFIG_INIT_ENV_ARG_LIMIT=32
-CONFIG_LOCALVERSION="-nosuspend"
+CONFIG_LOCALVERSION="-suspend"
 # CONFIG_LOCALVERSION_AUTO is not set
 CONFIG_SWAP=y
 CONFIG_SYSVIPC=y
@@ -229,11 +229,13 @@
 CONFIG_PM=y
 CONFIG_PM_LEGACY=y
 # CONFIG_PM_DEBUG is not set
+CONFIG_PM_SLEEP=y
 CONFIG_SUSPEND_UP_POSSIBLE=y
-# CONFIG_SUSPEND is not set
+CONFIG_SUSPEND=y
 CONFIG_HIBERNATION_UP_POSSIBLE=y
 # CONFIG_HIBERNATION is not set
 CONFIG_ACPI=y
+CONFIG_ACPI_SLEEP=y
 CONFIG_ACPI_PROCFS=y
 CONFIG_ACPI_PROC_EVENT=y
 CONFIG_ACPI_AC=m
@@ -255,6 +257,7 @@
 CONFIG_X86_PM_TIMER=y
 CONFIG_ACPI_CONTAINER=m
 CONFIG_ACPI_SBS=m
+# CONFIG_APM is not set

 #
 # CPU Frequency scaling

-- 
Oliver
-
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