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>
diff --git a/drivers/char/specialix.c b/drivers/char/specialix.c
index 7be456f..9f8495b 100644
--- a/drivers/char/specialix.c
+++ b/drivers/char/specialix.c
@@ -1365,7 +1365,9 @@
retval = -ERESTARTSYS;
break;
}
+ tty_unlock();
schedule();
+ tty_lock();
}
set_current_state(TASK_RUNNING);
