Re: USB_SUSPEND needs SUSPEND?

Rafael J. Wysocki
2007-10-28T13:19:25Z

On Sunday, 28 October 2007 02:00, Oliver Martin wrote:
> 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).

Some CCs added.

> --- /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
>
>