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| author | Oliver Neukum <oliver@neukum.org> | 2010-01-16 01:33:03 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2010-03-02 23:53:23 +0100 |
| commit | ef955341f692475236f0fbe6853f49337dff77a5 (patch) | |
| tree | 782c8677ba375ada558578fefe5321c84c5b4dff /Documentation | |
| parent | USB: storage: Never reset devices that will morph to an old mode (diff) | |
| download | linux-ef955341f692475236f0fbe6853f49337dff77a5.tar.xz linux-ef955341f692475236f0fbe6853f49337dff77a5.zip | |
USB: Export QUIRK_RESET_MORPHS through sysfs
Some devices which use mode switching revert to their
primary mode as they are reset. They must not be reset for
error handling. As user spaces makes the switch it also
has to tell the kernel that a device is quirky.
Signed-off-by: Oliver Neukum <oliver@neukum.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/ABI/testing/sysfs-bus-usb | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/Documentation/ABI/testing/sysfs-bus-usb b/Documentation/ABI/testing/sysfs-bus-usb index a07c0f366f91..a986e9bbba3d 100644 --- a/Documentation/ABI/testing/sysfs-bus-usb +++ b/Documentation/ABI/testing/sysfs-bus-usb @@ -159,3 +159,14 @@ Description: device. This is useful to ensure auto probing won't match the driver to the device. For example: # echo "046d c315" > /sys/bus/usb/drivers/foo/remove_id + +What: /sys/bus/usb/device/.../avoid_reset +Date: December 2009 +Contact: Oliver Neukum <oliver@neukum.org> +Description: + Writing 1 to this file tells the kernel that this + device will morph into another mode when it is reset. + Drivers will not use reset for error handling for + such devices. +Users: + usb_modeswitch |