[v3,2/2] libcamera: v4l2_videodevice: Use scope_exit
diff mbox series

Message ID 20250730102733.21314-3-laurent.pinchart@ideasonboard.com
State New
Headers show
Series
  • libcamera: Introduce and use scope_exit
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Commit Message

Laurent Pinchart July 30, 2025, 10:27 a.m. UTC 
The V4L2VideoDevice::queueBuffer() function performs the same cleanup
action in many error paths. Use scope_exit to simplify it.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
---
 src/libcamera/v4l2_videodevice.cpp | 11 +++--------
 1 file changed, 3 insertions(+), 8 deletions(-)

Patch
diff mbox series 

diff --git a/src/libcamera/v4l2_videodevice.cpp b/src/libcamera/v4l2_videodevice.cpp
index 71cc7e895d8c..d206244fa9a6 100644
--- a/src/libcamera/v4l2_videodevice.cpp
+++ b/src/libcamera/v4l2_videodevice.cpp
@@ -1668,6 +1668,8 @@  int V4L2VideoDevice::queueBuffer(FrameBuffer *buffer)
 	if (ret < 0)
 		return ret;
 
+	auto guard = utils::scope_exit{ [&]() { cache_->put(buf.index); } };
+
 	buf.index = ret;
 	buf.type = bufferType_;
 	buf.memory = memoryType_;
@@ -1683,15 +1685,11 @@  int V4L2VideoDevice::queueBuffer(FrameBuffer *buffer)
 	 */
 	if (planes.size() < numV4l2Planes) {
 		LOG(V4L2, Error) << "Frame buffer has too few planes";
-		cache_->put(buf.index);
-
 		return -EINVAL;
 	}
 
 	if (planes.size() != numV4l2Planes && !buffer->_d()->isContiguous()) {
 		LOG(V4L2, Error) << "Device format requires contiguous buffer";
-		cache_->put(buf.index);
-
 		return -EINVAL;
 	}
 
@@ -1734,8 +1732,6 @@  int V4L2VideoDevice::queueBuffer(FrameBuffer *buffer)
 				if (i != planes.size() - 1 && bytesused != length) {
 					LOG(V4L2, Error)
 						<< "Holes in multi-planar buffer not supported";
-					cache_->put(buf.index);
-
 					return -EINVAL;
 				}
 			}
@@ -1785,8 +1781,6 @@  int V4L2VideoDevice::queueBuffer(FrameBuffer *buffer)
 		LOG(V4L2, Error)
 			<< "Failed to queue buffer " << buf.index << ": "
 			<< strerror(-ret);
-		cache_->put(buf.index);
-
 		return ret;
 	}
 
@@ -1798,6 +1792,7 @@  int V4L2VideoDevice::queueBuffer(FrameBuffer *buffer)
 
 	queuedBuffers_[buf.index] = buffer;
 
+	guard.release();
 	return 0;
 }