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 <gi...@benyossef.com> --- 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