提交 6f08b72c 编写于 作者: K Kirill Smelkov 提交者: Linus Torvalds

[PATCH] serial moxa: fix wrong BUG

There is a wrong BUG in mxser_close.

The BUG is triggered when tty->driver_data == NULL, But in fact this is not
a bug, because tty->driver->close is called even when tty->driver->open
fails.

LDD3 tells us to do nothing in such cases.
Signed-off-by: NKirill Smelkov <kirr@mns.spb.ru>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
上级 64698b69
......@@ -917,6 +917,9 @@ static int mxser_open(struct tty_struct *tty, struct file *filp)
struct mxser_struct *info;
int retval, line;
/* initialize driver_data in case something fails */
tty->driver_data = NULL;
line = tty->index;
if (line == MXSER_PORTS)
return 0;
......@@ -979,7 +982,7 @@ static void mxser_close(struct tty_struct *tty, struct file *filp)
if (tty->index == MXSER_PORTS)
return;
if (!info)
BUG();
return;
spin_lock_irqsave(&info->slock, flags);
......
Markdown is supported
0% .
You are about to add 0 people to the discussion. Proceed with caution.
先完成此消息的编辑!
想要评论请 注册