Received-SPF: pass (google.com: best guess record for domain of linux-crypto-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67;
From:   Zaibo Xu <xuzaibo@huawei.com>
To:     <herbert@gondor.apana.org.au>, <davem@davemloft.net>
CC:     <linux-crypto@vger.kernel.org>, <linuxarm@huawei.com>,
        <jonathan.cameron@huawei.com>, <wangzhou1@hisilicon.com>,
        <tanghui20@huawei.com>, <yekai13@huawei.com>,
        <liulongfang@huawei.com>, <qianweili@huawei.com>,
        <zhangwei375@huawei.com>, <fanghao11@huawei.com>,
        <forest.zhouchang@huawei.com>
Subject: [PATCH v2 1/9] crypto: hisilicon - Update debugfs usage of SEC V2
Date:   Sat, 11 Jan 2020 10:41:48 +0800
Message-ID: <1578710516-40535-2-git-send-email-xuzaibo@huawei.com>
In-Reply-To: <1578710516-40535-1-git-send-email-xuzaibo@huawei.com>
References: <1578710516-40535-1-git-send-email-xuzaibo@huawei.com>
MIME-Version: 1.0
Content-Type: text/plain
Sender: linux-crypto-owner@vger.kernel.org
Precedence: bulk

Applied some advices of Marco Elver on atomic usage of Debugfs,
which is carried out by basing on Arnd Bergmann's fixing patch.

Reported-by: Arnd Bergmann <arnd@arndb.de>
Reported-by: Marco Elver <elver@google.com>
Signed-off-by: Zaibo Xu <xuzaibo@huawei.com>
---
 drivers/crypto/hisilicon/sec2/sec.h        |  2 +-
 drivers/crypto/hisilicon/sec2/sec_crypto.c |  8 ++++----
 drivers/crypto/hisilicon/sec2/sec_main.c   | 18 +++++++++---------
 3 files changed, 14 insertions(+), 14 deletions(-)

diff --git a/drivers/crypto/hisilicon/sec2/sec.h b/drivers/crypto/hisilicon/sec2/sec.h
index b846d73..841f4c5 100644
--- a/drivers/crypto/hisilicon/sec2/sec.h
+++ b/drivers/crypto/hisilicon/sec2/sec.h
@@ -40,7 +40,7 @@ struct sec_req {
 	int req_id;
 
 	/* Status of the SEC request */
-	atomic_t fake_busy;
+	bool fake_busy;
 };
 
 /**
diff --git a/drivers/crypto/hisilicon/sec2/sec_crypto.c b/drivers/crypto/hisilicon/sec2/sec_crypto.c
index 0a5391f..2475aaf 100644
--- a/drivers/crypto/hisilicon/sec2/sec_crypto.c
+++ b/drivers/crypto/hisilicon/sec2/sec_crypto.c
@@ -141,7 +141,7 @@ static int sec_bd_send(struct sec_ctx *ctx, struct sec_req *req)
 		return -ENOBUFS;
 
 	if (!ret) {
-		if (atomic_read(&req->fake_busy))
+		if (req->fake_busy)
 			ret = -EBUSY;
 		else
 			ret = -EINPROGRESS;
@@ -641,7 +641,7 @@ static void sec_skcipher_callback(struct sec_ctx *ctx, struct sec_req *req)
 	if (ctx->c_ctx.c_mode == SEC_CMODE_CBC && req->c_req.encrypt)
 		sec_update_iv(req);
 
-	if (atomic_cmpxchg(&req->fake_busy, 1, 0) != 1)
+	if (req->fake_busy)
 		sk_req->base.complete(&sk_req->base, -EINPROGRESS);
 
 	sk_req->base.complete(&sk_req->base, req->err_type);
@@ -672,9 +672,9 @@ static int sec_request_init(struct sec_ctx *ctx, struct sec_req *req)
 	}
 
 	if (ctx->fake_req_limit <= atomic_inc_return(&qp_ctx->pending_reqs))
-		atomic_set(&req->fake_busy, 1);
+		req->fake_busy = true;
 	else
-		atomic_set(&req->fake_busy, 0);
+		req->fake_busy = false;
 
 	ret = ctx->req_op->get_res(ctx, req);
 	if (ret) {
diff --git a/drivers/crypto/hisilicon/sec2/sec_main.c b/drivers/crypto/hisilicon/sec2/sec_main.c
index ab742df..d40e2da 100644
--- a/drivers/crypto/hisilicon/sec2/sec_main.c
+++ b/drivers/crypto/hisilicon/sec2/sec_main.c
@@ -608,13 +608,13 @@ static const struct file_operations sec_dbg_fops = {
 	.write = sec_debug_write,
 };
 
-static int debugfs_atomic64_t_get(void *data, u64 *val)
+static int sec_debugfs_atomic64_get(void *data, u64 *val)
 {
-        *val = atomic64_read((atomic64_t *)data);
-        return 0;
+	*val = atomic64_read((atomic64_t *)data);
+	return 0;
 }
-DEFINE_DEBUGFS_ATTRIBUTE(fops_atomic64_t_ro, debugfs_atomic64_t_get, NULL,
-                        "%lld\n");
+DEFINE_DEBUGFS_ATTRIBUTE(sec_atomic64_ops, sec_debugfs_atomic64_get,
+			 NULL, "%lld\n");
 
 static int sec_core_debug_init(struct sec_dev *sec)
 {
@@ -636,11 +636,11 @@ static int sec_core_debug_init(struct sec_dev *sec)
 
 	debugfs_create_regset32("regs", 0444, tmp_d, regset);
 
-	debugfs_create_file("send_cnt", 0444, tmp_d, &dfx->send_cnt,
-			    &fops_atomic64_t_ro);
+	debugfs_create_file("send_cnt", 0444, tmp_d,
+			    &dfx->send_cnt, &sec_atomic64_ops);
 
-	debugfs_create_file("recv_cnt", 0444, tmp_d, &dfx->recv_cnt,
-			    &fops_atomic64_t_ro);
+	debugfs_create_file("recv_cnt", 0444, tmp_d,
+			    &dfx->recv_cnt, &sec_atomic64_ops);
 
 	return 0;
 }
-- 
2.8.1