linux-kernel - [PATCH 1/5] tee: amdtee: remove unused variable initialization

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Message-Id: <c0bcf36040cd57a1616692539a6c2743f476d25f.1578572591.git.Rijo-john.Thomas@amd.com>
Date:   Thu,  9 Jan 2020 18:23:18 +0530
From:   Rijo Thomas <Rijo-john.Thomas@....com>
To:     Jens Wiklander <jens.wiklander@...aro.org>,
        Herbert Xu <herbert@...dor.apana.org.au>,
        Gary R Hook <gary.hook@....com>, tee-dev@...ts.linaro.org,
        linux-kernel@...r.kernel.org, linux-crypto@...r.kernel.org
Cc:     Rijo Thomas <Rijo-john.Thomas@....com>,
        Nimesh Easow <Nimesh.Easow@....com>,
        Devaraj Rangasamy <Devaraj.Rangasamy@....com>,
        Dan Carpenter <dan.carpenter@...cle.com>
Subject: [PATCH 1/5] tee: amdtee: remove unused variable initialization

Remove unused variable initialization from driver code.

If enabled as a compiler option, compiler may throw warning for
unused assignments.

Reported-by: Dan Carpenter <dan.carpenter@...cle.com>
Fixes: 757cc3e9ff1d ("tee: add AMD-TEE driver")
Signed-off-by: Rijo Thomas <Rijo-john.Thomas@....com>
---
 drivers/tee/amdtee/call.c | 14 +++++++-------
 drivers/tee/amdtee/core.c | 14 +++++++-------
 2 files changed, 14 insertions(+), 14 deletions(-)

diff --git a/drivers/tee/amdtee/call.c b/drivers/tee/amdtee/call.c
index 87ccad256686..096dd4d92d39 100644
--- a/drivers/tee/amdtee/call.c
+++ b/drivers/tee/amdtee/call.c
@@ -124,8 +124,8 @@ static int amd_params_to_tee_params(struct tee_param *tee, u32 count,
 int handle_unload_ta(u32 ta_handle)
 {
 	struct tee_cmd_unload_ta cmd = {0};
-	int ret = 0;
 	u32 status;
+	int ret;
 
 	if (!ta_handle)
 		return -EINVAL;
@@ -145,8 +145,8 @@ int handle_unload_ta(u32 ta_handle)
 int handle_close_session(u32 ta_handle, u32 info)
 {
 	struct tee_cmd_close_session cmd = {0};
-	int ret = 0;
 	u32 status;
+	int ret;
 
 	if (ta_handle == 0)
 		return -EINVAL;
@@ -167,8 +167,8 @@ int handle_close_session(u32 ta_handle, u32 info)
 void handle_unmap_shmem(u32 buf_id)
 {
 	struct tee_cmd_unmap_shared_mem cmd = {0};
-	int ret = 0;
 	u32 status;
+	int ret;
 
 	cmd.buf_id = buf_id;
 
@@ -183,7 +183,7 @@ int handle_invoke_cmd(struct tee_ioctl_invoke_arg *arg, u32 sinfo,
 		      struct tee_param *p)
 {
 	struct tee_cmd_invoke_cmd cmd = {0};
-	int ret = 0;
+	int ret;
 
 	if (!arg || (!p && arg->num_params))
 		return -EINVAL;
@@ -229,7 +229,7 @@ int handle_map_shmem(u32 count, struct shmem_desc *start, u32 *buf_id)
 {
 	struct tee_cmd_map_shared_mem *cmd;
 	phys_addr_t paddr;
-	int ret = 0, i;
+	int ret, i;
 	u32 status;
 
 	if (!count || !start || !buf_id)
@@ -294,7 +294,7 @@ int handle_open_session(struct tee_ioctl_open_session_arg *arg, u32 *info,
 			struct tee_param *p)
 {
 	struct tee_cmd_open_session cmd = {0};
-	int ret = 0;
+	int ret;
 
 	if (!arg || !info || (!p && arg->num_params))
 		return -EINVAL;
@@ -342,7 +342,7 @@ int handle_load_ta(void *data, u32 size, struct tee_ioctl_open_session_arg *arg)
 {
 	struct tee_cmd_load_ta cmd = {0};
 	phys_addr_t blob;
-	int ret = 0;
+	int ret;
 
 	if (size == 0 || !data || !arg)
 		return -EINVAL;
diff --git a/drivers/tee/amdtee/core.c b/drivers/tee/amdtee/core.c
index 9d0cee1c837f..b3f8235579f7 100644
--- a/drivers/tee/amdtee/core.c
+++ b/drivers/tee/amdtee/core.c
@@ -50,7 +50,7 @@ static int amdtee_open(struct tee_context *ctx)
 
 static void release_session(struct amdtee_session *sess)
 {
-	int i = 0;
+	int i;
 
 	/* Close any open session */
 	for (i = 0; i < TEE_NUM_SESSIONS; ++i) {
@@ -173,7 +173,7 @@ static int copy_ta_binary(struct tee_context *ctx, void *ptr, void **ta,
 		u16 hi_ver;
 		u8 seq_n[8];
 	} *uuid = ptr;
-	int n = 0, rc = 0;
+	int n, rc = 0;
 
 	n = snprintf(fw_name, TA_PATH_MAX,
 		     "%s/%08x-%04x-%04x-%02x%02x%02x%02x%02x%02x%02x%02x.bin",
@@ -219,9 +219,9 @@ int amdtee_open_session(struct tee_context *ctx,
 	struct amdtee_context_data *ctxdata = ctx->data;
 	struct amdtee_session *sess = NULL;
 	u32 session_info;
-	void *ta = NULL;
 	size_t ta_size;
-	int rc = 0, i;
+	int rc, i;
+	void *ta;
 
 	if (arg->clnt_login != TEE_IOCTL_LOGIN_PUBLIC) {
 		pr_err("unsupported client login method\n");
@@ -368,8 +368,8 @@ int amdtee_map_shmem(struct tee_shm *shm)
 
 void amdtee_unmap_shmem(struct tee_shm *shm)
 {
+	struct amdtee_shm_data *shmnode;
 	u32 buf_id;
-	struct amdtee_shm_data *shmnode = NULL;
 
 	if (!shm)
 		return;
@@ -434,9 +434,9 @@ static const struct tee_desc amdtee_desc = {
 
 static int __init amdtee_driver_init(void)
 {
-	struct amdtee *amdtee = NULL;
 	struct tee_device *teedev;
-	struct tee_shm_pool *pool = ERR_PTR(-EINVAL);
+	struct tee_shm_pool *pool;
+	struct amdtee *amdtee;
 	int rc;
 
 	rc = psp_check_tee_status();
-- 
2.17.1