diff options
| author | Lars-Peter Clausen <lars@metafoo.de> | 2011-12-19 15:23:45 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2011-12-22 13:38:08 -0800 |
| commit | bb01443e2cdad4ff5b98e00252e93110d00f4392 (patch) | |
| tree | fb57bb214b5721edeb64f050bd4ceeb0892d1eef /lib/mpi/mpi-mpow.c | |
| parent | e38c79e0825b673d97cecfb36bae9e859e724f1b (diff) | |
staging:iio: Make sure a device is only opened once at a time
Our buffer implementation does not support multiple concurrent readers. So we
have to ensure that a device is only opened once at a time. So do the same thing
we do for the event fd and introduce a per device busy flag. The flag gets set
when opening the device and gets cleared when closing the device. If a open is
attempted while the busy flag is set we return -EBUSY.
Acked-by: Jonathan Cameron <jic23@kernel.org>
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'lib/mpi/mpi-mpow.c')
0 files changed, 0 insertions, 0 deletions