]> git.karo-electronics.de Git - karo-tx-linux.git/commit
isdn/gigaset: reset tty->receive_room when attaching ser_gigaset
authorTilman Schmidt <tilman@imap.cc>
Mon, 13 Jul 2015 22:37:13 +0000 (00:37 +0200)
committerDavid S. Miller <davem@davemloft.net>
Thu, 16 Jul 2015 00:24:45 +0000 (17:24 -0700)
commitfd98e9419d8d622a4de91f76b306af6aa627aa9c
treee9047d514d1ba80a6aad4027860dd1c4d4e3f42a
parent052cbda41fdc243a8d40cce7ab3a6327b4b2887e
isdn/gigaset: reset tty->receive_room when attaching ser_gigaset

Commit 79901317ce80 ("n_tty: Don't flush buffer when closing ldisc"),
first merged in kernel release 3.10, caused the following regression
in the Gigaset M101 driver:

Before that commit, when closing the N_TTY line discipline in
preparation to switching to N_GIGASET_M101, receive_room would be
reset to a non-zero value by the call to n_tty_flush_buffer() in
n_tty's close method. With the removal of that call, receive_room
might be left at zero, blocking data reception on the serial line.

The present patch fixes that regression by setting receive_room
to an appropriate value in the ldisc open method.

Fixes: 79901317ce80 ("n_tty: Don't flush buffer when closing ldisc")
Signed-off-by: Tilman Schmidt <tilman@imap.cc>
Signed-off-by: David S. Miller <davem@davemloft.net>
drivers/isdn/gigaset/ser-gigaset.c