diff options
| -rw-r--r-- | drivers/staging/comedi/comedi_fops.c | 11 |
1 files changed, 8 insertions, 3 deletions
diff --git a/drivers/staging/comedi/comedi_fops.c b/drivers/staging/comedi/comedi_fops.c index 4dd42890c641..2a2b5a06ed0e 100644 --- a/drivers/staging/comedi/comedi_fops.c +++ b/drivers/staging/comedi/comedi_fops.c @@ -2331,9 +2331,12 @@ static ssize_t comedi_write(struct file *file, const char __user *buf, } async = s->async; - - if (!s->busy || !nbytes) + if (!nbytes) + goto out; + if (!s->busy) { + retval = -EINVAL; goto out; + } if (s->busy != file) { retval = -EACCES; goto out; @@ -2373,8 +2376,10 @@ static ssize_t comedi_write(struct file *file, const char __user *buf, retval = -ERESTARTSYS; break; } - if (!s->busy) + if (!s->busy) { + retval = -EINVAL; break; + } if (s->busy != file) { retval = -EACCES; break; |