linux/Documentation/serial, branch v4.9

Documentation: rs485: Do not define manually the ioctl

2016-08-18T17:08:33Z

It is not a very good practice to define the IOCTL manually instead of using the header file. Fix it on the documentation example. Signed-off-by: Ricardo Ribalda Delgado Signed-off-by: Jonathan Corbet

Merge tag 'tty-4.7-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty

2016-05-21T03:57:27Z

Pull tty and serial driver updates from Greg KH: "Here's the large TTY and Serial driver update for 4.7-rc1. A few new serial drivers are added here, and Peter has fixed a bunch of long-standing bugs in the tty layer and serial drivers as normal. Full details in the shortlog. All of these have been in linux-next for a while with no reported issues" * tag 'tty-4.7-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty: (88 commits) MAINTAINERS: 8250: remove website reference serial: core: Fix port mutex assert if lockdep disabled serial: 8250_dw: fix wrong logic in dw8250_check_lcr() tty: vt, finish looping on duplicate tty: vt, return error when con_startup fails QE-UART: add "fsl,t1040-ucc-uart" to of_device_id serial: mctrl_gpio: Drop support for out1-gpios and out2-gpios serial: 8250dw: Add device HID for future AMD UART controller Fix OpenSSH pty regression on close serial: mctrl_gpio: add IRQ locking serial: 8250: Integrate Fintek into 8250_base serial: mps2-uart: add support for early console serial: mps2-uart: add MPS2 UART driver dt-bindings: document the MPS2 UART bindings serial: sirf: Use generic uart-has-rtscts DT property serial: sirf: Introduce helper variable struct device_node *np serial: mxs-auart: Use generic uart-has-rtscts DT property serial: imx: Use generic uart-has-rtscts DT property doc: DT: Add Generic Serial Device Tree Bindings serial: 8250: of: Make tegra_serial_handle_break() static ...

serial: doc: Use port->state instead of info

2016-05-14T16:18:25Z

As of commit ebd2c8f6d2ec4012 ("serial: kill off uart_info"), the circular transmission buffer is part of struct uart_state instead of struct uart_info. Make it clear this structure is pointed to from struct uart_port. Change 'circ' to 'circ_buf' to match the structure name while we're at it. Signed-off-by: Geert Uytterhoeven Signed-off-by: Jonathan Corbet

serial: doc: Always refer to tty_port->mutex

2016-05-14T16:18:19Z

Stop referring to the mutex member of the tty_port struct as 'port->mutex', as 'port' is ambiguous, and usually refers to the uart_port struct in this document. Use 'tty_port->mutex' instead, following the single existing use. Signed-off-by: Geert Uytterhoeven Signed-off-by: Jonathan Corbet

Fix OpenSSH pty regression on close

2016-05-01T20:22:54Z

OpenSSH expects the (non-blocking) read() of pty master to return EAGAIN only if it has received all of the slave-side output after it has received SIGCHLD. This used to work on pre-3.12 kernels. This fix effectively forces non-blocking read() and poll() to block for parallel i/o to complete for all ttys. It also unwinds these changes: 1) f8747d4a466ab2cafe56112c51b3379f9fdb7a12 tty: Fix pty master read() after slave closes 2) 52bce7f8d4fc633c9a9d0646eef58ba6ae9a3b73 pty, n_tty: Simplify input processing on final close 3) 1a48632ffed61352a7810ce089dc5a8bcd505a60 pty: Fix input race when closing Inspired by analysis and patch from Marc Aurele La France Reported-by: Volth Reported-by: Marc Aurele La France BugLink: https://bugzilla.mindrot.org/show_bug.cgi?id=52 BugLink: https://bugzilla.mindrot.org/show_bug.cgi?id=2492 Signed-off-by: Brian Bloniarz Reviewed-by: Peter Hurley Cc: stable Signed-off-by: Greg Kroah-Hartman

serial: doc: .break_ctl() may sleep

2016-04-16T16:43:12Z

break_ctl() is not called from any sort of atomic context, so there is no problem with it sleeping. Reported-by: Peter Hurley Signed-off-by: Geert Uytterhoeven Signed-off-by: Jonathan Corbet

serial: doc: .(un)throttle() are serialized by the tty layer

2016-04-15T21:59:12Z

Document that .(un)throttle() are serialized with each other, and with termios modification by the tty layer. Reported-by: Peter Hurley Signed-off-by: Geert Uytterhoeven Signed-off-by: Jonathan Corbet

serial: doc: .(un)throttle() depends on hardware assisted flow control

2016-04-15T21:59:06Z

Document that .throttle() and .unthrottle() are relevant only if hardware assisted flow control is enabled. Signed-off-by: Geert Uytterhoeven Signed-off-by: Jonathan Corbet

serial: doc: Re-add paragraph documenting uart_console_write()

2016-04-15T21:59:01Z

Commit 834392a7d92677ff ("serial: doc: Un-document non-existing uart_write_console()") removed a paragraph about a helper function that seemed to never exist. Peter Hurley pointed out that the function does exist, but is called differently. Re-add the paragraph, with the function name corrected. Fixes: 834392a7d92677ff ("serial: doc: Un-document non-existing uart_write_console()") Signed-off-by: Geert Uytterhoeven Signed-off-by: Jonathan Corbet

serial: doc: Correct return type of mctrl_gpio_to_gpiod()

2016-03-31T06:58:39Z

Signed-off-by: Geert Uytterhoeven Signed-off-by: Jonathan Corbet