media: camera-sensor.rst: fix c:function build warning

The :c:function: tag evaluation depends on Sphinx version 2 or 3.
Use a syntax that should work with both versions.

Link: https://lore.kernel.org/linux-media/e4214991b7d59c0d7aa4e6e48833dc1809c47d47.1616484262.git.mchehab+huawei@kernel.org
Fixes: c0e3bcb25390 ("media: camera-sensor.rst: fix a doc build warning")
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

diff --git a/Documentation/driver-api/media/camera-sensor.rst b/Documentation/driver-api/media/camera-sensor.rst
index cd5c989769a131124a1d4ef1994ded2f4efb5d1b..7160336aa475383dc7922d3c150285ff83113a4a 100644 (file)
--- a/Documentation/driver-api/media/camera-sensor.rst
+++ b/Documentation/driver-api/media/camera-sensor.rst
@@ -144,9 +144,7 @@ of the device. This is because the power state of the device is only changed
 after the power state transition has taken place. The ``s_ctrl`` callback can be
 used to obtain device's power state after the power state transition:
 
-.. c:function::
-
-       int pm_runtime_get_if_in_use(struct device *dev);
+.. c:function:: int pm_runtime_get_if_in_use(struct device *dev);
 
 The function returns a non-zero value if it succeeded getting the power count or
 runtime PM was disabled, in either of which cases the driver may proceed to