crypto: ccp - fix lock acquisition code

This patch simplifies an unneeded read-write lock.

Signed-off-by: Gary R Hook <gary.hook@amd.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

diff --git a/drivers/crypto/ccp/ccp-dev.c b/drivers/crypto/ccp/ccp-dev.c
index 336e5b7..4dbc187 100644 (file)
--- a/drivers/crypto/ccp/ccp-dev.c
+++ b/drivers/crypto/ccp/ccp-dev.c
@@ -53,7 +53,7 @@ static DEFINE_RWLOCK(ccp_unit_lock);
 static LIST_HEAD(ccp_units);
 
 /* Round-robin counter */
-static DEFINE_RWLOCK(ccp_rr_lock);
+static DEFINE_SPINLOCK(ccp_rr_lock);
 static struct ccp_device *ccp_rr;
 
 /* Ever-increasing value to produce unique unit numbers */
@@ -128,14 +128,14 @@ static struct ccp_device *ccp_get_device(void)
         */
        read_lock_irqsave(&ccp_unit_lock, flags);
        if (!list_empty(&ccp_units)) {
-               write_lock_irqsave(&ccp_rr_lock, flags);
+               spin_lock(&ccp_rr_lock);
                dp = ccp_rr;
                if (list_is_last(&ccp_rr->entry, &ccp_units))
                        ccp_rr = list_first_entry(&ccp_units, struct ccp_device,
                                                  entry);
                else
                        ccp_rr = list_next_entry(ccp_rr, entry);
-               write_unlock_irqrestore(&ccp_rr_lock, flags);
+               spin_unlock(&ccp_rr_lock);
        }
        read_unlock_irqrestore(&ccp_unit_lock, flags);