Document spinlock usage to protect against concurrent
access to HW register which must occur a single
request at a time.
Signed-off-by: Gilad Ben-Yossef <gilad@xxxxxxxxxxxxx>
---
drivers/staging/ccree/ssi_request_mgr.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/staging/ccree/ssi_request_mgr.c b/drivers/staging/ccree/ssi_request_mgr.c
index 65c4d9f..1d9c038 100644
--- a/drivers/staging/ccree/ssi_request_mgr.c
+++ b/drivers/staging/ccree/ssi_request_mgr.c
@@ -43,6 +43,9 @@ struct ssi_request_mgr_handle {
u32 req_queue_tail;
u32 axi_completed;
u32 q_free_slots;
+ /* This lock protects access to HW register
+ * that must be single request at a time
+ */
spinlock_t hw_lock;
struct cc_hw_desc compl_desc;
u8 *dummy_comp_buff;
--
2.7.4
