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| author |   Arnd Bergmann <arnd@arndb.de> | 2010-06-01 22:53:10 +0200 |
|---|---|---|
| committer |   Greg Kroah-Hartman <gregkh@suse.de> | 2010-08-10 13:47:44 -0700 |
| commit | e142a31da34b42458e10026b554e66127739cf23 (patch) | |
| tree | 1f65a42cd559116223e1fa1db7631cd449c73968 /drivers/char/tty_port.c | |
| parent | tty: implement BTM as mutex instead of BKL (diff) | |
| download | linux-dev-e142a31da34b42458e10026b554e66127739cf23.tar.xz linux-dev-e142a31da34b42458e10026b554e66127739cf23.zip | |
tty: release BTM while sleeping in block_til_ready
Most tty drivers may block while opening a device.
Since this possibly depends on another thread
closing it first and both threads may need the BTM,
we need to release it here.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/char/tty_port.c')
| -rw-r--r-- | drivers/char/tty_port.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/char/tty_port.c b/drivers/char/tty_port.c index 35eb30402f18..33d37d230f8f 100644 --- a/drivers/char/tty_port.c +++ b/drivers/char/tty_port.c @@ -294,7 +294,9 @@ int tty_port_block_til_ready(struct tty_port *port, retval = -ERESTARTSYS; break; } + tty_unlock(); schedule(); + tty_lock(); } finish_wait(&port->open_wait, &wait); |