linux.git/drivers/usb/core/usb.h, branch v6.0

usbcore: Check both id_table and match() when both available

2020-10-28T12:24:58+00:00

From: Bastien Nocera 

When a USB device driver has both an id_table and a match() function, make
sure to check both to find a match, first matching the id_table, then
checking the match() function.

This makes it possible to have module autoloading done through the
id_table when devices are plugged in, before checking for further
device eligibility in the match() function.

Cc:  # 5.8
Cc: Greg Kroah-Hartman 
Cc: Alan Stern 
Co-developed-by: M. Vefa Bicakci 
Tested-by: Bastien Nocera 
Signed-off-by: Bastien Nocera 
Signed-off-by: M. Vefa Bicakci 
Tested-by: Pan (Pany) YUAN 
Link: https://lore.kernel.org/r/20201022135521.375211-2-m.v.b@runbox.com
Signed-off-by: Greg Kroah-Hartman

USB: core: remove polling for /sys/kernel/debug/usb/devices

2020-10-02T13:32:46+00:00

The latest reference to usbfs_conn_disc_event() removed in
commit fb28d58b72aa ("USB: remove CONFIG_USB_DEVICEFS")
in 2012 and now a user poll() waits infinitely for content changes.

Signed-off-by: Sergey Korolev 
Link: https://lore.kernel.org/r/20200809161233.13135-1-s.korolev@ndmsystems.com
Signed-off-by: Greg Kroah-Hartman

USB: rename USB quirk to USB_QUIRK_ENDPOINT_IGNORE

2020-06-19T06:58:37+00:00

The USB core has a quirk flag to ignore specific endpoints, so rename it
to be more obvious what this quirk does.

Cc: Johan Hovold 
Cc: Alan Stern 
Cc: Richard Dodd 
Cc: Hans de Goede 
Cc: Jonathan Cox 
Cc: Bastien Nocera 
Cc: "Thiébaud Weksteen" 
Cc: Nishad Kamdar 
Link: https://lore.kernel.org/r/20200618094300.1887727-2-gregkh@linuxfoundation.org
Signed-off-by: Greg Kroah-Hartman

USB: core: Use the correct style for SPDX License Identifier

2020-04-16T12:32:45+00:00

This patch corrects the SPDX License Identifier style in
header files related to USB Core.
For C header files Documentation/process/license-rules.rst
mandates C-like comments (opposed to C source files where
C++ style should be used).

Changes made by using a script provided by Joe Perches here:
https://lkml.org/lkml/2019/2/7/46.

Suggested-by: Joe Perches 
Signed-off-by: Nishad Kamdar 
Link: https://lore.kernel.org/r/20200328091844.GA3648@nishad
Signed-off-by: Greg Kroah-Hartman

Merge 5.6-rc3 into usb-next

2020-02-24T07:48:49+00:00

We need the USB fixes in here as well.

Signed-off-by: Greg Kroah-Hartman

USB: Implement usb_device_match_id()

2020-02-12T19:01:55+00:00

Match a usb_device with a table of IDs.

Signed-off-by: Bastien Nocera 
Acked-by: Alan Stern 
Link: https://lore.kernel.org/r/20191016093933.693-4-hadess@hadess.net
Signed-off-by: Greg Kroah-Hartman

USB: Export generic USB device driver functions

2020-02-12T19:01:54+00:00

This will make it possible to implement device drivers which extend the
generic driver without needing to reimplement it.

Signed-off-by: Bastien Nocera 
Acked-by: Alan Stern 
Link: https://lore.kernel.org/r/20191016093933.693-2-hadess@hadess.net
Signed-off-by: Greg Kroah-Hartman

USB: core: add endpoint-blacklist quirk

2020-02-10T19:14:22+00:00

Add a new device quirk that can be used to blacklist endpoints.

Since commit 3e4f8e21c4f2 ("USB: core: fix check for duplicate
endpoints") USB core ignores any duplicate endpoints found during
descriptor parsing.

In order to handle devices where the first interfaces with duplicate
endpoints are the ones that should have their endpoints ignored, we need
to add a blacklist.

Tested-by: edes 
Cc: stable 
Signed-off-by: Johan Hovold 
Link: https://lore.kernel.org/r/20200203153830.26394-2-johan@kernel.org
Signed-off-by: Greg Kroah-Hartman

Merge 5.3-rc4 into usb-next

2019-08-12T05:42:51+00:00

We need the USB fixes in here as well.

Signed-off-by: Greg Kroah-Hartman

usbfs: Add ioctls for runtime power management

2019-08-09T05:55:45+00:00

It has been requested that usbfs should implement runtime power
management, instead of forcing the device to remain at full power as
long as the device file is open. This patch introduces that new
feature.

It does so by adding three new usbfs ioctls:

USBDEVFS_FORBID_SUSPEND: Prevents the device from going into
runtime suspend (and causes a resume if the device is already
suspended).

USBDEVFS_ALLOW_SUSPEND: Allows the device to go into runtime
suspend. Some time may elapse before the device actually is
suspended, depending on things like the autosuspend delay.

USBDEVFS_WAIT_FOR_RESUME: Blocks until the call is interrupted
by a signal or at least one runtime resume has occurred since
the most recent ALLOW_SUSPEND ioctl call (which may mean
immediately, even if the device is currently suspended). In
the latter case, the device is prevented from suspending again
just as if FORBID_SUSPEND was called before the ioctl returns.

For backward compatibility, when the device file is first opened
runtime suspends are forbidden. The userspace program can then allow
suspends whenever it wants, and either resume the device directly (by
forbidding suspends again) or wait for a resume from some other source
(such as a remote wakeup). URBs submitted to a suspended device will
fail or will complete with an appropriate error code.

This combination of ioctls is sufficient for user programs to have
nearly the same degree of control over a device's runtime power
behavior as kernel drivers do.

Still lacking is documentation for the new ioctls. I intend to add it
later, after the existing documentation for the usbfs userspace API is
straightened out into a reasonable form.

Suggested-by: Mayuresh Kulkarni
Signed-off-by: Alan Stern

Link: https://lore.kernel.org/r/Pine.LNX.4.44L0.1908071013220.1514-100000@iolanthe.rowland.org
Signed-off-by: Greg Kroah-Hartman