[PATCH 1/7] crypto: qat - remove spin_lock in qat_ablkcipher_setkey

[Giovanni Cabiddu]

From: Xin Zeng <xin.z...@intel.com>

Remove unnecessary spin lock in qat_ablkcipher_setkey.

Reviewed-by: Conor Mcloughlin <conor.mclough...@intel.com>
Tested-by: Sergey Portnoy <sergey.port...@intel.com>
Signed-off-by: Xin Zeng <xin.z...@intel.com>
Signed-off-by: Giovanni Cabiddu <giovanni.cabi...@intel.com>
---
 drivers/crypto/qat/qat_common/qat_algs.c | 16 +++-------------
 1 file changed, 3 insertions(+), 13 deletions(-)

diff --git a/drivers/crypto/qat/qat_common/qat_algs.c 
b/drivers/crypto/qat/qat_common/qat_algs.c
index c8d401646902..413e05e8891e 100644
--- a/drivers/crypto/qat/qat_common/qat_algs.c
+++ b/drivers/crypto/qat/qat_common/qat_algs.c
@@ -131,7 +131,6 @@ struct qat_alg_ablkcipher_ctx {
        struct icp_qat_fw_la_bulk_req dec_fw_req;
        struct qat_crypto_instance *inst;
        struct crypto_tfm *tfm;
-       spinlock_t lock;        /* protects qat_alg_ablkcipher_ctx struct */
 };
 
 static int qat_get_inter_state_size(enum icp_qat_hw_auth_algo qat_hash_alg)
@@ -912,7 +911,6 @@ static int qat_alg_ablkcipher_setkey(struct 
crypto_ablkcipher *tfm,
        struct qat_alg_ablkcipher_ctx *ctx = crypto_ablkcipher_ctx(tfm);
        struct device *dev;
 
-       spin_lock(&ctx->lock);
        if (ctx->enc_cd) {
                /* rekeying */
                dev = &GET_DEV(ctx->inst->accel_dev);
@@ -925,29 +923,22 @@ static int qat_alg_ablkcipher_setkey(struct 
crypto_ablkcipher *tfm,
                int node = get_current_node();
                struct qat_crypto_instance *inst =
                                qat_crypto_get_instance_node(node);
-               if (!inst) {
-                       spin_unlock(&ctx->lock);
+               if (!inst)
                        return -EINVAL;
-               }
 
                dev = &GET_DEV(inst->accel_dev);
                ctx->inst = inst;
                ctx->enc_cd = dma_alloc_coherent(dev, sizeof(*ctx->enc_cd),
                                                 &ctx->enc_cd_paddr,
                                                 GFP_ATOMIC);
-               if (!ctx->enc_cd) {
-                       spin_unlock(&ctx->lock);
+               if (!ctx->enc_cd)
                        return -ENOMEM;
-               }
                ctx->dec_cd = dma_alloc_coherent(dev, sizeof(*ctx->dec_cd),
                                                 &ctx->dec_cd_paddr,
                                                 GFP_ATOMIC);
-               if (!ctx->dec_cd) {
-                       spin_unlock(&ctx->lock);
+               if (!ctx->dec_cd)
                        goto out_free_enc;
-               }
        }
-       spin_unlock(&ctx->lock);
        if (qat_alg_ablkcipher_init_sessions(ctx, key, keylen, mode))
                goto out_free_all;
 
@@ -1119,7 +1110,6 @@ static int qat_alg_ablkcipher_init(struct crypto_tfm *tfm)
 {
        struct qat_alg_ablkcipher_ctx *ctx = crypto_tfm_ctx(tfm);
 
-       spin_lock_init(&ctx->lock);
        tfm->crt_ablkcipher.reqsize = sizeof(struct qat_crypto_request);
        ctx->tfm = tfm;
        return 0;
-- 
2.20.1