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authorAlan Cox <alan@lxorguk.ukuu.org.uk>2009-06-11 12:25:25 +0100
committerLinus Torvalds <torvalds@linux-foundation.org>2009-06-11 08:50:56 -0700
commit1ec739be75a6cb961a46ba0b1982d0edb7f27558 (patch)
treeb9e75b3171d1a5b715465b82c9cb2b711e6d5550 /include
parentfcc8ac1825d3d0fb81f73bc1a80ebc863168bb56 (diff)
tty: Implement a drain delay in the tty port
We need this for devices that cannot flush and wait, but which do not order data and modem events. Without it we will hang up before all the data clears the hardware. Needed for the USB changes. Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include')
-rw-r--r--include/linux/tty.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/include/linux/tty.h b/include/linux/tty.h
index 98694364c96f..bed5a3d40307 100644
--- a/include/linux/tty.h
+++ b/include/linux/tty.h
@@ -201,6 +201,9 @@ struct tty_port {
unsigned char *xmit_buf; /* Optional buffer */
int close_delay; /* Close port delay */
int closing_wait; /* Delay for output */
+ int drain_delay; /* Set to zero if no pure time
+ based drain is needed else
+ set to size of fifo */
};
/*