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staging: dgnc: return -ENOMEM when kzalloc failed

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The kzalloc can be failed when memory is not enough
to allocate. When kzalloc failed, it need to return
error code with ENOMEM

Signed-off-by: Daeseok Youn <daeseok.youn@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Daeseok Youn 2016-04-05 18:29:43 +09:00 committed by Greg Kroah-Hartman
parent 6b3752d8ce
commit 16f10a825d
1 changed files with 8 additions and 0 deletions
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8
drivers/staging/dgnc/dgnc_tty.c
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@ -1106,6 +1106,14 @@ static int dgnc_tty_open(struct tty_struct *tty, struct file *file)
if (!ch->ch_wqueue) if (!ch->ch_wqueue)
ch->ch_wqueue = kzalloc(WQUEUESIZE, GFP_KERNEL); ch->ch_wqueue = kzalloc(WQUEUESIZE, GFP_KERNEL);
if (!ch->ch_rqueue || !ch->ch_equeue || !ch->ch_wqueue) {
kfree(ch->ch_rqueue);
kfree(ch->ch_equeue);
kfree(ch->ch_wqueue);
return -ENOMEM;
}
spin_lock_irqsave(&ch->ch_lock, flags); spin_lock_irqsave(&ch->ch_lock, flags);
ch->ch_flags &= ~(CH_OPENING); ch->ch_flags &= ~(CH_OPENING);