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| author | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-11-30 08:33:06 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-11-30 08:33:06 +0100 |
| commit | 3473065927a877e0a15c4d4b64f245ccaba24e3f (patch) | |
| tree | 5d4ebdd84c192e8b2ca6c8f6be32e07f240c836c /drivers/accessibility/speakup | |
| parent | f80c21509984190b7fd462ed2c9ac5a294a99dc5 (diff) | |
| parent | b65054597872ce3aefbc6a666385eabdf9e288da (diff) | |
Merge 5.10-rc6 into char-misc-next
We need the fixes in here as well.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/accessibility/speakup')
| -rw-r--r-- | drivers/accessibility/speakup/spk_ttyio.c | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/drivers/accessibility/speakup/spk_ttyio.c b/drivers/accessibility/speakup/spk_ttyio.c index ecc39983e946..669392f31d4e 100644 --- a/drivers/accessibility/speakup/spk_ttyio.c +++ b/drivers/accessibility/speakup/spk_ttyio.c @@ -49,15 +49,25 @@ static int spk_ttyio_ldisc_open(struct tty_struct *tty) if (!tty->ops->write) return -EOPNOTSUPP; + + mutex_lock(&speakup_tty_mutex); + if (speakup_tty) { + mutex_unlock(&speakup_tty_mutex); + return -EBUSY; + } speakup_tty = tty; ldisc_data = kmalloc(sizeof(*ldisc_data), GFP_KERNEL); - if (!ldisc_data) + if (!ldisc_data) { + speakup_tty = NULL; + mutex_unlock(&speakup_tty_mutex); return -ENOMEM; + } init_completion(&ldisc_data->completion); ldisc_data->buf_free = true; speakup_tty->disc_data = ldisc_data; + mutex_unlock(&speakup_tty_mutex); return 0; } |