linux.git/drivers/usb/core/usb.c, branch v3.7

USB: Disable LPM while the device is unconfigured.

2012-07-11T11:06:46+00:00

The USB 3.0 Set/Clear Feature U1/U2 Enable cannot be sent to a device in
the Default or Addressed state.  It can only be sent to a configured
device.  Change the USB core to initialize the LPM disable count to 1
(disabled), which reflects this limitation.

Change usb_set_configuration() to ensure that if the device is
unconfigured on entry, usb_lpm_disable() is not called.  This avoids
sending the Clear Feature U1/U2 when the device is in the Addressed
state.  When usb_set_configuration() exits with a successfully installed
configuration, usb_lpm_enable() will be called.

Once the new configuration is installed, make sure
usb_set_configuration() only calls usb_enable_lpm() if the device moved
to the Configured state.  If we have unconfigured the device by sending
it a Set Configuration for config 0, don't enable LPM.

This commit should be backported to kernels as old as 3.5, that contain
the commit 8306095fd2c1100e8244c09bf560f97aca5a311d "USB: Disable USB
3.0 LPM in critical sections."

Signed-off-by: Sarah Sharp 
Cc: stable@vger.kernel.org

usb: fix breakage on systems without ACPI

2012-05-16T12:29:19+00:00

Commit da0af6e ("usb: Bind devices to ACPI devices when possible") really
tries to force-bind devices even when impossible, unlike what it says in
the subject.

CONFIG_ACPI is not an indication that ACPI tables are actually present, nor
is an indication that any USB relevant information is present in them. There
is no reason to fail the creation of a USB bus if it can't bind it to
ACPI device during initialization.

On systems with CONFIG_ACPI set but without ACPI tables it would cause a
boot panic.

Signed-off-by: Sasha Levin 
Signed-off-by: Greg Kroah-Hartman

usb: Bind devices to ACPI devices when possible

2012-05-12T00:06:13+00:00

Built-in USB devices will typically have a representation in the system
ACPI tables. Add support for binding the two together so the USB code can
make use of the associated methods.

Signed-off-by: Matthew Garrett 
Signed-off-by: Lan Tianyu 
Signed-off-by: Greg Kroah-Hartman

USB: remove CONFIG_USB_DEVICEFS

2012-04-30T02:20:03+00:00

This option has been deprecated for many years now, and no userspace
tools use it anymore, so it should be safe to finally remove it.

Reported-by: Kay Sievers 
Signed-off-by: Greg Kroah-Hartman

USB: cleanup the handling of the PM complete call

2012-01-24T22:23:49+00:00

This eliminates the last instance of a function's behavior
controlled by a parameter as Linus hates such things.

Signed-off-by: Oliver Neukum 
Acked-by: Alan Stern 
Signed-off-by: Greg Kroah-Hartman

module_param: make bool parameters really bool (drivers & misc)

2012-01-12T23:02:20+00:00

module_param(bool) used to counter-intuitively take an int.  In
fddd5201 (mid-2009) we allowed bool or int/unsigned int using a messy
trick.

It's time to remove the int/unsigned int option.  For this version
it'll simply give a warning, but it'll break next kernel version.

Acked-by: Mauro Carvalho Chehab 
Signed-off-by: Rusty Russell

switch device_get_devnode() and ->devnode() to umode_t *

2012-01-04T03:54:55+00:00

both callers of device_get_devnode() are only interested in lower 16bits
and nobody tries to return anything wider than 16bit anyway.

Signed-off-by: Al Viro

usbcore: get BOS descriptor set

2011-09-26T22:51:08+00:00

This commit gets BOS(Binary Device Object Store) descriptor set for Super
Speed devices and High Speed devices which support BOS descriptor.

BOS descriptor is used to report additional USB device-level capabilities
that are not reported via the Device descriptor. By getting BOS descriptor
set, driver can check device's device-level capability such as LPM
capability.

Signed-off-by: Andiry Xu 
Signed-off-by: Sarah Sharp 
Signed-off-by: Greg Kroah-Hartman

usb: core: Change usb_create_sysfs_intf_files()' return type to void

2011-04-30T00:24:38+00:00

The usb_create_sysfs_intf_files() function always returned zero even
if it failed to create sysfs fails.  Since this is a desired behaviour
there is no need to return return code at all.  This commit changes
function's return type (form int) to void.

Signed-off-by: Michal Nazarewicz 
Cc: Sergey Senozhatsky 
Signed-off-by: Greg Kroah-Hartman

USB: Move runtime PM callbacks to usb_device_pm_ops

2011-03-18T18:55:36+00:00

USB defines usb_device_type pointing to usb_device_pm_ops that
provides system-wide PM callbacks only and usb_bus_type pointing to
usb_bus_pm_ops that provides runtime PM callbacks only.  However,
the USB runtime PM callbacks may be defined in usb_device_pm_ops
which makes it possible to drop usb_bus_pm_ops and will allow us
to consolidate the handling of subsystems by the PM core code.

Signed-off-by: Rafael J. Wysocki 
Acked-by: Greg Kroah-Hartman