remoteproc: add actual recovery implementation

Add rproc_trigger_recovery() which takes care of the recovery itself,
by removing, and re-adding, all of the remoteproc's virtio devices.

This resets all virtio users of the remote processor, during which
the remote processor is powered off and on again.

Signed-off-by: Fernando Guzman Lugo <fernando.lugo@ti.com>
[ohad: introduce rproc_add_virtio_devices to avoid 1.copying code 2.anomaly]
[ohad: some white space, naming and commit log changes]
Signed-off-by: Ohad Ben-Cohen <ohad@wizery.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/include/linux/remoteproc.h b/include/linux/remoteproc.h
index a46ed2723803..0c1a2f95be76 100644
--- a/include/linux/remoteproc.h
+++ b/include/linux/remoteproc.h
@@ -398,6 +398,7 @@ enum rproc_crash_type {
  * @index: index of this rproc device
  * @crash_handler: workqueue for handling a crash
  * @crash_cnt: crash counter
+ * @crash_comp: completion used to sync crash handler and the rproc reload
  */
 struct rproc {
         struct klist_node node;
@@ -423,6 +424,7 @@ struct rproc {
         int index;
         struct work_struct crash_handler;
         unsigned crash_cnt;
+        struct completion crash_comp;
 };
 
 /* we currently support only two vrings per rvdev */