linux-toradex.git/drivers/tty/serdev, branch v4.15-rc2

tty: serdev: Remove redundant license text

2017-11-08T12:08:12+00:00

Now that the SPDX tag is in all tty files, that identifies the license
in a specific and legally-defined manner.  So the extra GPL text wording
can be removed as it is no longer needed at all.

This is done on a quest to remove the 700+ different ways that files in
the kernel describe the GPL license text.  And there's unneeded stuff
like the address (sometimes incorrect) for the FSF which is never
needed.

No copyright headers or other non-license-description text was removed.

Cc: Rob Herring 
Cc: Jiri Slaby 
Signed-off-by: Greg Kroah-Hartman

tty: add SPDX identifiers to all remaining files in drivers/tty/

2017-11-08T12:08:12+00:00

It's good to have SPDX identifiers in all files to make it easier to
audit the kernel tree for correct licenses.

Update the drivers/tty files files with the correct SPDX license
identifier based on the license text in the file itself.  The SPDX
identifier is a legally binding shorthand, which can be used instead of
the full boiler plate text.

This work is based on a script and data from Thomas Gleixner, Philippe
Ombredanne, and Kate Stewart.

Cc: Jiri Slaby 
Cc: Benjamin Herrenschmidt 
Cc: Paul Mackerras 
Cc: Michael Ellerman 
Cc: Chris Metcalf 
Cc: Jiri Kosina 
Cc: David Sterba 
Cc: James Hogan 
Cc: Rob Herring 
Cc: Eric Anholt 
Cc: Stefan Wahren 
Cc: Florian Fainelli 
Cc: Ray Jui 
Cc: Scott Branden 
Cc: bcm-kernel-feedback-list@broadcom.com
Cc: "James E.J. Bottomley" 
Cc: Helge Deller 
Cc: Joachim Eastwood 
Cc: Matthias Brugger 
Cc: Masahiro Yamada 
Cc: Tobias Klauser 
Cc: Russell King 
Cc: Vineet Gupta 
Cc: Richard Genoud 
Cc: Alexander Shiyan 
Cc: Baruch Siach 
Cc: "Maciej W. Rozycki" 
Cc: "Uwe Kleine-König" 
Cc: Pat Gefre 
Cc: "Guilherme G. Piccoli" 
Cc: Jason Wessel 
Cc: Vladimir Zapolskiy 
Cc: Sylvain Lemieux 
Cc: Carlo Caione 
Cc: Kevin Hilman 
Cc: Liviu Dudau 
Cc: Sudeep Holla 
Cc: Lorenzo Pieralisi 
Cc: Andy Gross 
Cc: David Brown 
Cc: "Andreas Färber" 
Cc: Kevin Cernekee 
Cc: Laxman Dewangan 
Cc: Thierry Reding 
Cc: Jonathan Hunter 
Cc: Barry Song 
Cc: Patrice Chotard 
Cc: Maxime Coquelin 
Cc: Alexandre Torgue 
Cc: "David S. Miller" 
Cc: Peter Korsgaard 
Cc: Timur Tabi 
Cc: Tony Prisk 
Cc: Michal Simek 
Cc: "Sören Brinkmann" 
Cc: Thomas Gleixner 
Cc: Kate Stewart 
Cc: Philippe Ombredanne 
Cc: Jiri Slaby 
Signed-off-by: Greg Kroah-Hartman

serdev: fix controller-allocation error handling

2017-10-23T09:25:48+00:00

Reorder controller initialisation so that in the unlikely event that id
allocation fails, we don't end up releasing id 0 in the destructor.

Signed-off-by: Johan Hovold 
Signed-off-by: Greg Kroah-Hartman

serdev: fix registration of second slave

2017-10-23T09:25:33+00:00

Serdev currently only supports a single slave device, but the required
sanity checks to prevent further registration attempts were missing.

If a serial-port node has two child nodes with compatible properties,
the OF code would try to register two slave devices using the same id
and name. Driver core will not allow this (and there will be loud
complaints), but the controller's slave pointer would already have been
set to address of the soon to be deallocated second struct
serdev_device. As the first slave device remains registered, this can
lead to later use-after-free issues when the slave callbacks are
accessed.

Note that while the serdev registration helpers are exported, they are
typically only called by serdev core. Any other (out-of-tree) callers
must serialise registration and deregistration themselves.

Fixes: cd6484e1830b ("serdev: Introduce new bus for serial attached devices")
Cc: stable 	# 4.11
Cc: Rob Herring 
Signed-off-by: Johan Hovold 
Signed-off-by: Greg Kroah-Hartman

serdev: ttyport: add missing open() error handling

2017-10-23T09:24:24+00:00

Add missing error handling for tty-driver open() which may fail (e.g. if
resource allocation fails or if a port is being disconnected).

Note that close() must be called also in case of failed open() and that
the operation sanity check is amended to catch buggy drivers.

Signed-off-by: Johan Hovold 
Acked-by: Rob Herring 
Signed-off-by: Greg Kroah-Hartman

serdev: ttyport: enforce tty-driver open() requirement

2017-10-23T09:24:24+00:00

The tty-driver open routine is mandatory, but the serdev
tty-port-controller implementation did not treat it as such and would
instead fall back to calling tty_port_open() directly.

Signed-off-by: Johan Hovold 
Acked-by: Rob Herring 
Signed-off-by: Greg Kroah-Hartman

serdev: Add ACPI support

2017-10-20T12:24:44+00:00

This patch allows SerDev module to manage serial devices declared as
attached to an UART in ACPI table.

acpi_serdev_add_device() callback will only take into account entries
without enumerated flag set. This flags is set for all entries during
ACPI scan, except for SPI and I2C serial devices, and for UART with
2nd patch in the series.

Check if a serdev device as been allocated during acpi_walk_namespace()
to prevent serdev controller registration instead of the tty-class device.

Signed-off-by: Frédéric Danis 
Reviewed-by: Rob Herring 
Reviewed-by: Sebastian Reichel 
Reviewed-by: Johan Hovold 
Acked-by: Rafael J. Wysocki 
Signed-off-by: Greg Kroah-Hartman

serdev: enable TTY port controller support by default

2017-10-20T12:20:06+00:00

Amend the Serial device bus Kconfig entries to clarify that you most
likely also want to enable TTY port controller support, and make
SERIAL_DEV_CTRL_TTYPORT default to Y (when bus support is enabled).

Note that the TTY port controller is currently the only in-kernel
serdev controller implementation.

Signed-off-by: Johan Hovold 
Reviewed-by: Sebastian Reichel 
Signed-off-by: Greg Kroah-Hartman

tty: Convert to using %pOF instead of full_name

2017-07-30T14:35:28+00:00

Now that we have a custom printf format specifier, convert users of
full_name to use %pOF instead. This is preparation to remove storing
of the full path string for each node.

Signed-off-by: Rob Herring 
Acked-by: David S. Miller 
Cc: Jiri Slaby 
Cc: Benjamin Herrenschmidt 
Cc: Paul Mackerras 
Cc: Michael Ellerman 
Cc: "David S. Miller" 
Cc: linuxppc-dev@lists.ozlabs.org
Cc: linux-serial@vger.kernel.org
Cc: sparclinux@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman

Merge tag 'driver-core-4.13-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core

2017-07-04T03:27:48+00:00

Pull driver core updates from Greg KH:
 "Here is the big driver core update for 4.13-rc1.

  The large majority of this is a lot of cleanup of old fields in the
  driver core structures and their remaining usages in random drivers.
  All of those fixes have been reviewed by the various subsystem
  maintainers. There's also some small firmware updates in here, a new
  kobject uevent api interface that makes userspace interaction easier,
  and a few other minor things.

  All of these have been in linux-next for a long while with no reported
  issues"

* tag 'driver-core-4.13-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core: (56 commits)
  arm: mach-rpc: ecard: fix build error
  zram: convert remaining CLASS_ATTR() to CLASS_ATTR_RO()
  driver-core: remove struct bus_type.dev_attrs
  powerpc: vio_cmo: use dev_groups and not dev_attrs for bus_type
  powerpc: vio: use dev_groups and not dev_attrs for bus_type
  USB: usbip: convert to use DRIVER_ATTR_RW
  s390: drivers: convert to use DRIVER_ATTR_RO/WO
  platform: thinkpad_acpi: convert to use DRIVER_ATTR_RO/RW
  pcmcia: ds: convert to use DRIVER_ATTR_RO
  wireless: ipw2x00: convert to use DRIVER_ATTR_RW
  net: ehea: convert to use DRIVER_ATTR_RO
  net: caif: convert to use DRIVER_ATTR_RO
  TTY: hvc: convert to use DRIVER_ATTR_RW
  PCI: pci-driver: convert to use DRIVER_ATTR_WO
  IB: nes: convert to use DRIVER_ATTR_RW
  HID: hid-core: convert to use DRIVER_ATTR_RO and drv_groups
  arm: ecard: fix dev_groups patch typo
  tty: serdev: use dev_groups and not dev_attrs for bus_type
  sparc: vio: use dev_groups and not dev_attrs for bus_type
  hid: intel-ish-hid: use dev_groups and not dev_attrs for bus_type
  ...