From 217e0250cccb9e54d457991446cd3fab413085e1 Mon Sep 17 00:00:00 2001 From: Volodymyr Babchuk Date: Wed, 29 Nov 2017 14:48:37 +0200 Subject: tee: use reference counting for tee_context We need to ensure that tee_context is present until last shared buffer will be freed. Signed-off-by: Volodymyr Babchuk Signed-off-by: Jens Wiklander --- include/linux/tee_drv.h | 7 +++++++ 1 file changed, 7 insertions(+) (limited to 'include/linux/tee_drv.h') diff --git a/include/linux/tee_drv.h b/include/linux/tee_drv.h index 0f86a480c204..157e8d06bf49 100644 --- a/include/linux/tee_drv.h +++ b/include/linux/tee_drv.h @@ -17,6 +17,7 @@ #include #include +#include #include #include @@ -42,11 +43,17 @@ struct tee_shm_pool; * @teedev: pointer to this drivers struct tee_device * @list_shm: List of shared memory object owned by this context * @data: driver specific context data, managed by the driver + * @refcount: reference counter for this structure + * @releasing: flag that indicates if context is being released right now. + * It is needed to break circular dependency on context during + * shared memory release. */ struct tee_context { struct tee_device *teedev; struct list_head list_shm; void *data; + struct kref refcount; + bool releasing; }; struct tee_param_memref { -- cgit v1.2.3