If we fail to queue the buffer then it can never be dequeued. This can
lead to a forever loop in stop_streaming() when we wait for everything
to finish.
Fixes: 70ec64ccdaac ("staging: bcm2835-camera: Ensure all buffers are returned
on disable")
Signed-off-by: Dan Carpenter <[email protected]>
---
>From static analysis. Not tested. Please review carefully etc.
drivers/staging/vc04_services/vchiq-mmal/mmal-vchiq.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/staging/vc04_services/vchiq-mmal/mmal-vchiq.c
b/drivers/staging/vc04_services/vchiq-mmal/mmal-vchiq.c
index dc767730db43..65dd2a55b3da 100644
--- a/drivers/staging/vc04_services/vchiq-mmal/mmal-vchiq.c
+++ b/drivers/staging/vc04_services/vchiq-mmal/mmal-vchiq.c
@@ -441,6 +441,8 @@ buffer_from_host(struct vchiq_mmal_instance *instance,
ret = vchiq_queue_kernel_message(instance->service_handle, &m,
sizeof(struct mmal_msg_header) +
sizeof(m.u.buffer_from_host));
+ if (ret)
+ atomic_dec(&port->buffers_with_vpu);
vchiq_release_service(instance->service_handle);
--
2.27.0
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