This patch implements a dummy slave that has no functionality. Helps managing slaves in the OMAP 3 camera driver; no need to check for NULL pointers.
Signed-off-by: Sakari Ailus <[email protected]> Signed-off-by: Sergio Aguirre <[email protected]> --- drivers/media/video/v4l2-int-device.c | 19 +++++++++++++++++++ include/media/v4l2-int-device.h | 2 ++ 2 files changed, 21 insertions(+), 0 deletions(-) diff --git a/drivers/media/video/v4l2-int-device.c b/drivers/media/video/v4l2-int-device.c index a935bae..cba1c9c 100644 --- a/drivers/media/video/v4l2-int-device.c +++ b/drivers/media/video/v4l2-int-device.c @@ -32,6 +32,25 @@ static DEFINE_MUTEX(mutex); static LIST_HEAD(int_list); +static struct v4l2_int_slave dummy_slave = { + /* Dummy pointer to avoid underflow in find_ioctl. */ + .ioctls = (void *)0x80000000, + .num_ioctls = 0, +}; + +static struct v4l2_int_device dummy = { + .type = v4l2_int_type_slave, + .u = { + .slave = &dummy_slave, + }, +}; + +struct v4l2_int_device *v4l2_int_device_dummy() +{ + return &dummy; +} +EXPORT_SYMBOL_GPL(v4l2_int_device_dummy); + void v4l2_int_device_try_attach_all(void) { struct v4l2_int_device *m, *s; diff --git a/include/media/v4l2-int-device.h b/include/media/v4l2-int-device.h index 9c2df41..85a1834 100644 --- a/include/media/v4l2-int-device.h +++ b/include/media/v4l2-int-device.h @@ -84,6 +84,8 @@ struct v4l2_int_device { void *priv; }; +struct v4l2_int_device *v4l2_int_device_dummy(void); + void v4l2_int_device_try_attach_all(void); int v4l2_int_device_register(struct v4l2_int_device *d); -- 1.5.6.5 -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
