rpmsg_virtio: fix the rpmsg_get_tx/rx_buffer() api

user tx/rx buffer size = orignal tx/rx buffer_size - sizeof(rpmsg_hdr) And use buffer size in config to calculate the user buffer size instead the buffer size from virtqueue, because there may be no buffer in virtqueeu. Signed-off-by: yintao <[email protected]> Signed-off-by: Bowen Wang <[email protected]>
OpenAMP · Nov 4, 2024 · dd3eff5 · dd3eff5
1 parent 71887e7
commit dd3eff5
Showing 1 changed file with 2 additions and 4 deletions.
diff --git a/lib/rpmsg/rpmsg_virtio.c b/lib/rpmsg/rpmsg_virtio.c
@@ -727,8 +727,7 @@ int rpmsg_virtio_get_tx_buffer_size(struct rpmsg_device *rdev)
 		 * If other core is host then buffers are provided by it,
 		 * so get the buffer size from the virtqueue.
 		 */
-		size = (int)virtqueue_get_desc_size(rvdev->svq) -
-		       sizeof(struct rpmsg_hdr);
+		size = rvdev->config.r2h_buf_size - sizeof(struct rpmsg_hdr);
 	}
 
 	if (size <= 0)
@@ -763,8 +762,7 @@ int rpmsg_virtio_get_rx_buffer_size(struct rpmsg_device *rdev)
 		 * If other core is host then buffers are provided by it,
 		 * so get the buffer size from the virtqueue.
 		 */
-		size = (int)virtqueue_get_desc_size(rvdev->rvq) -
-		       sizeof(struct rpmsg_hdr);
+		size = rvdev->config.h2r_buf_size - sizeof(struct rpmsg_hdr);
 	}
 
 	if (size <= 0)