From da4e52ac3e0af04ab75ed979f44db35557028f50 Mon Sep 17 00:00:00 2001 From: Gilad Ben-Yossef Date: Mon, 13 Nov 2017 14:45:38 +0000 Subject: [PATCH] staging: ccree: document spinlock usage 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 Signed-off-by: Greg Kroah-Hartman --- 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 65c4d9f3f262..1d9c0381059b 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; -- 2.45.2