diff options
| author | Lars-Peter Clausen <lars@metafoo.de> | 2013-10-04 15:06:00 +0400 |
|---|---|---|
| committer | Jonathan Cameron <jic23@kernel.org> | 2013-10-12 15:04:17 +0400 |
| commit | f18e7a068a0a31250cdb251810f8f6224931c3f5 (patch) | |
| tree | 9692a94465954c615370dec9cd82baeb4387a211 /drivers/iio/industrialio-event.c | |
| parent | 9e69c935fad9fd5f0550c51e3bd251cd30033136 (diff) | |
| download | linux-f18e7a068a0a31250cdb251810f8f6224931c3f5.tar.xz | |
iio: Return -ENODEV for file operations if the device has been unregistered
If the IIO device has been unregistered return -ENODEV for any further file
operations like read() and ioctl(). This avoids userspace being able to grab new
references to the device.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Diffstat (limited to 'drivers/iio/industrialio-event.c')
| -rw-r--r-- | drivers/iio/industrialio-event.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/iio/industrialio-event.c b/drivers/iio/industrialio-event.c index 36f0c8e0eb3d..837d450457dd 100644 --- a/drivers/iio/industrialio-event.c +++ b/drivers/iio/industrialio-event.c @@ -76,6 +76,9 @@ static unsigned int iio_event_poll(struct file *filep, struct iio_event_interface *ev_int = indio_dev->event_interface; unsigned int events = 0; + if (!indio_dev->info) + return -ENODEV; + poll_wait(filep, &ev_int->wait, wait); spin_lock_irq(&ev_int->wait.lock); @@ -96,6 +99,9 @@ static ssize_t iio_event_chrdev_read(struct file *filep, unsigned int copied; int ret; + if (!indio_dev->info) + return -ENODEV; + if (count < sizeof(struct iio_event_data)) return -EINVAL; |