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authorGary R Hook <gary.hook@amd.com>2016-03-16 09:02:26 -0500
committerHerbert Xu <herbert@gondor.apana.org.au>2016-03-17 19:09:02 +0800
commit03a6f29000fdc13adc2bb2e22efd07a51d334154 (patch)
tree6bcfe5e38d88a74da2086b40eaea3dad0fd24af3 /drivers/crypto/ccp
parentd1558f4e95cb14b0fff5c0b839c15a21f7e8aed0 (diff)
downloadop-kernel-dev-03a6f29000fdc13adc2bb2e22efd07a51d334154.zip
op-kernel-dev-03a6f29000fdc13adc2bb2e22efd07a51d334154.tar.gz
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>
Diffstat (limited to 'drivers/crypto/ccp')
-rw-r--r--drivers/crypto/ccp/ccp-dev.c6
1 files changed, 3 insertions, 3 deletions
diff --git a/drivers/crypto/ccp/ccp-dev.c b/drivers/crypto/ccp/ccp-dev.c
index 336e5b7..4dbc187 100644
--- 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);
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