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| author | Geert Uytterhoeven <geert+renesas@glider.be> | 2016-04-14 11:08:10 +0200 |
|---|---|---|
| committer | Jonathan Corbet <corbet@lwn.net> | 2016-04-15 23:59:12 +0200 |
| commit | 18717b06ee4897c2cc5e92783386c4b304b9fce9 (patch) | |
| tree | a01b932aae17683aea65600c72eb7422730af5c2 /Documentation/serial/driver | |
| parent | serial: doc: .(un)throttle() depends on hardware assisted flow control (diff) | |
| download | linux-18717b06ee4897c2cc5e92783386c4b304b9fce9.tar.xz linux-18717b06ee4897c2cc5e92783386c4b304b9fce9.zip | |
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: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Diffstat (limited to 'Documentation/serial/driver')
| -rw-r--r-- | Documentation/serial/driver | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/Documentation/serial/driver b/Documentation/serial/driver index 03b703cf9318..7fb80682e394 100644 --- a/Documentation/serial/driver +++ b/Documentation/serial/driver @@ -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. |