Refactor function rproc_trigger_auto_boot() to properly deal
with scenarios where the remoteproc core needs to attach with a
remote processor that has already been booted by an external
entity.
Signed-off-by: Mathieu Poirier <mathieu.poirier@xxxxxxxxxx>
---
drivers/remoteproc/remoteproc_core.c | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/drivers/remoteproc/remoteproc_core.c b/drivers/remoteproc/remoteproc_core.c
index 48ddc29814be..d32ac8f0c872 100644
--- a/drivers/remoteproc/remoteproc_core.c
+++ b/drivers/remoteproc/remoteproc_core.c
@@ -1586,6 +1586,15 @@ static int rproc_trigger_auto_boot(struct rproc *rproc)
{
int ret;
+ /*
+ * Since the remote processor is in a detached state, it has already
+ * been booted by another entity. As such there is no point in waiting
+ * for a firmware image to be loaded, we can simply initiate the process
+ * of attaching to it immediately.
+ */
+ if (rproc->state == RPROC_DETACHED)
+ return rproc_boot(rproc);
+
/*
* We're initiating an asynchronous firmware loading, so we can
* be built-in kernel code, without hanging the boot process.
--
2.20.1
