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authorArnd Bergmann <arnd@arndb.de>2010-06-01 22:53:10 +0200
committerGreg Kroah-Hartman <gregkh@suse.de>2010-08-10 13:47:44 -0700
commite142a31da34b42458e10026b554e66127739cf23 (patch)
tree1f65a42cd559116223e1fa1db7631cd449c73968 /drivers/char/synclinkmp.c
parentb07471fa51358ce64cc25e1501544502362e4404 (diff)
downloadop-kernel-dev-e142a31da34b42458e10026b554e66127739cf23.zip
op-kernel-dev-e142a31da34b42458e10026b554e66127739cf23.tar.gz
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/synclinkmp.c')
-rw-r--r--drivers/char/synclinkmp.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/char/synclinkmp.c b/drivers/char/synclinkmp.c
index ac447c7..e56caf7 100644
--- a/drivers/char/synclinkmp.c
+++ b/drivers/char/synclinkmp.c
@@ -3365,7 +3365,9 @@ static int block_til_ready(struct tty_struct *tty, struct file *filp,
printk("%s(%d):%s block_til_ready() count=%d\n",
__FILE__,__LINE__, tty->driver->name, port->count );
+ tty_unlock();
schedule();
+ tty_lock();
}
set_current_state(TASK_RUNNING);
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