From: Tilman Schmidt Date: Thu, 5 Nov 2009 00:04:52 +0000 (-0800) Subject: tty: docs: serial/tty, add to ldisc methods X-Git-Tag: v2.6.33-rc1~310^2~36 X-Git-Url: https://asedeno.scripts.mit.edu/gitweb/?a=commitdiff_plain;h=7e11a0fb3b7ab83871b7a56c7a67c603283ec4b9;p=linux.git tty: docs: serial/tty, add to ldisc methods A small addition to the ldisc method descriptions. Signed-off-by: Tilman Schmidt Signed-off-by: Randy Dunlap Acked-by: Alan Cox Signed-off-by: Greg Kroah-Hartman --- diff --git a/Documentation/serial/tty.txt b/Documentation/serial/tty.txt index 8e65c4498c52..5e5349a4fcd2 100644 --- a/Documentation/serial/tty.txt +++ b/Documentation/serial/tty.txt @@ -42,7 +42,8 @@ TTY side interfaces: open() - Called when the line discipline is attached to the terminal. No other call into the line discipline for this tty will occur until it - completes successfully. Can sleep. + completes successfully. Returning an error will + prevent the ldisc from being attached. Can sleep. close() - This is called on a terminal when the line discipline is being unplugged. At the point of @@ -52,7 +53,7 @@ close() - This is called on a terminal when the line hangup() - Called when the tty line is hung up. The line discipline should cease I/O to the tty. No further calls into the ldisc code will occur. - Can sleep. + The return value is ignored. Can sleep. write() - A process is writing data through the line discipline. Multiple write calls are serialized @@ -83,6 +84,10 @@ ioctl() - Called when an ioctl is handed to the tty layer that might be for the ldisc. Multiple ioctl calls may occur in parallel. May sleep. +compat_ioctl() - Called when a 32 bit ioctl is handed to the tty layer + that might be for the ldisc. Multiple ioctl calls + may occur in parallel. May sleep. + Driver Side Interfaces: receive_buf() - Hand buffers of bytes from the driver to the ldisc