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Commit 18717b06 authored by Geert Uytterhoeven's avatar Geert Uytterhoeven Committed by Jonathan Corbet
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serial: doc: .(un)throttle() are serialized by the tty layer 



Document that .(un)throttle() are serialized with each other, and with
termios modification by the tty layer.

Reported-by: default avatarPeter Hurley <peter@hurleysoftware.com>
Signed-off-by: default avatarGeert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: default avatarJonathan Corbet <corbet@lwn.net>
parent a3bedc3b

Documentation/serial/driver

+4 −2
Original line number Diff line number Diff line
@@ -137,7 +137,8 @@ hardware. 
	should be sent to the serial port.

	This will be called only if hardware assisted flow control is enabled.



	Locking: none.

	Locking: serialized with .unthrottle() and termios modification by the

		 tty layer.



  unthrottle(port)

	Notify the serial driver that characters can now be sent to the serial
@@ -145,7 +146,8 @@ hardware. 
	disciplines.

	This will be called only if hardware assisted flow control is enabled.



	Locking: none.

	Locking: serialized with .throttle() and termios modification by the

		 tty layer.



  send_xchar(port,ch)

	Transmit a high priority character, even if the port is stopped.