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| author | Alan Stern <stern@rowland.harvard.edu> | 2007-03-13 16:39:15 -0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2007-04-27 13:28:35 -0700 |
| commit | eaafbc3a8adab16babe2c20e54ad3ba40d1fbbc9 (patch) | |
| tree | fea84341faf742efe8beeaff03ec94b687b7b26f /Documentation | |
| parent | 6b157c9bf3bace6eeb4a973da63923ef24995cce (diff) | |
| download | linux-eaafbc3a8adab16babe2c20e54ad3ba40d1fbbc9.tar.gz linux-eaafbc3a8adab16babe2c20e54ad3ba40d1fbbc9.tar.bz2 linux-eaafbc3a8adab16babe2c20e54ad3ba40d1fbbc9.zip | |
USB: Allow autosuspend delay to equal 0
This patch (as867) adds an entry for the new power/autosuspend
attribute in Documentation/ABI/testing, and it changes the behavior of
the delay value. Now a delay of 0 means to autosuspend as soon as
possible, and negative values will prevent autosuspend.
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/ABI/testing/sysfs-bus-usb | 15 | ||||
| -rw-r--r-- | Documentation/kernel-parameters.txt | 2 |
2 files changed, 16 insertions, 1 deletions
diff --git a/Documentation/ABI/testing/sysfs-bus-usb b/Documentation/ABI/testing/sysfs-bus-usb new file mode 100644 index 000000000000..00a84326325f --- /dev/null +++ b/Documentation/ABI/testing/sysfs-bus-usb @@ -0,0 +1,15 @@ +What: /sys/bus/usb/devices/.../power/autosuspend +Date: March 2007 +KernelVersion: 2.6.21 +Contact: Alan Stern <stern@rowland.harvard.edu> +Description: + Each USB device directory will contain a file named + power/autosuspend. This file holds the time (in seconds) + the device must be idle before it will be autosuspended. + 0 means the device will be autosuspended as soon as + possible. Negative values will prevent the device from + being autosuspended at all, and writing a negative value + will resume the device if it is already suspended. + + The autosuspend delay for newly-created devices is set to + the value of the usbcore.autosuspend module parameter. diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt index 12533a958c51..2017942e0966 100644 --- a/Documentation/kernel-parameters.txt +++ b/Documentation/kernel-parameters.txt @@ -1792,7 +1792,7 @@ and is between 256 and 4096 characters. It is defined in the file for newly-detected USB devices (default 2). This is the time required before an idle device will be autosuspended. Devices for which the delay is set - to 0 won't be autosuspended at all. + to a negative value won't be autosuspended at all. usbhid.mousepoll= [USBHID] The interval which mice are to be polled at. |