diff options
Diffstat (limited to 'drivers/hwtracing/coresight/coresight.c')
| -rw-r--r-- | drivers/hwtracing/coresight/coresight.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/drivers/hwtracing/coresight/coresight.c b/drivers/hwtracing/coresight/coresight.c index 2ed48545df26..6b44928c1076 100644 --- a/drivers/hwtracing/coresight/coresight.c +++ b/drivers/hwtracing/coresight/coresight.c @@ -24,6 +24,7 @@ #include <linux/coresight.h> #include <linux/of_platform.h> #include <linux/delay.h> +#include <linux/pm_runtime.h> #include "coresight-priv.h" @@ -376,7 +377,8 @@ out: /* * A path from this element to a sink has been found. The elements * leading to the sink are already enqueued, all that is left to do - * is add a node for this element. + * is tell the PM runtime core we need this element and add a node + * for it. */ node = kzalloc(sizeof(struct coresight_node), GFP_KERNEL); if (!node) @@ -384,6 +386,7 @@ out: node->csdev = csdev; list_add(&node->link, path); + pm_runtime_get_sync(csdev->dev.parent); return 0; } @@ -415,9 +418,13 @@ struct list_head *coresight_build_path(struct coresight_device *csdev) */ void coresight_release_path(struct list_head *path) { + struct coresight_device *csdev; struct coresight_node *nd, *next; list_for_each_entry_safe(nd, next, path, link) { + csdev = nd->csdev; + + pm_runtime_put_sync(csdev->dev.parent); list_del(&nd->link); kfree(nd); } |