Commit 03a6f290 authored by Gary R Hook's avatar Gary R Hook Committed by Herbert Xu

crypto: ccp - fix lock acquisition code

This patch simplifies an unneeded read-write lock.
Signed-off-by: default avatarGary R Hook <gary.hook@amd.com>
Signed-off-by: default avatarHerbert Xu <herbert@gondor.apana.org.au>
parent d1558f4e
......@@ -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);
......
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