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Remove BUG_ON from n_tty_read()

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Change the BUG_ON to WARN_ON and return in case of tty->read_buf==NULL. We want to track a
couple of long standing reports of this but at the same time we can avoid killing the box.

Signed-off-by: Stanislav Kozina <skozina@redhat.com>
Signed-off-by: Alan Cox <alan@linux.intel.com>
Cc: Horses <stable@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Stanislav Kozina 2012-08-16 12:01:47 +01:00 committed by Greg Kroah-Hartman
parent 6683549e4b
commit e9490e93c1
1 changed files with 2 additions and 1 deletions
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3
drivers/tty/n_tty.c
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@ -1742,7 +1742,8 @@ static ssize_t n_tty_read(struct tty_struct *tty, struct file *file,
do_it_again:
BUG_ON(!tty->read_buf);
if (WARN_ON(!tty->read_buf))
return -EAGAIN;
c = job_control(tty, file);
if (c < 0)