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    Subject[PATCH 10/24] staging: ccree: document spinlock usage
    Date
    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@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
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