NFC: pn533: Optimise issued cmd context tracking

Use struct pn533_cmd instead of pn533_send_async_complete_arg
to track the context of the issued cmd.

This way pn533_send_async_complete_arg struct is no needed
anymore. Just move issuer complete callback to pn533_cmd struct.

Signed-off-by: Waldemar Rymarkiewicz <waldemar.rymarkiewicz@tieto.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>

diff --git a/drivers/nfc/pn533.c b/drivers/nfc/pn533.c
index 48902e58cacb9d256fcfd6b4d6f5619a337f9531..2f39209507d4c46c132cc827db2d01eda3438e06 100644 (file)
--- a/drivers/nfc/pn533.c
+++ b/drivers/nfc/pn533.c
@@ -363,7 +363,8 @@ struct pn533_cmd {
        struct sk_buff *req;
        struct sk_buff *resp;
        int resp_len;
-       void *arg;
+       pn533_send_async_complete_t  complete_cb;
+       void *complete_cb_context;
 };
 
 struct pn533_std_frame {
@@ -691,39 +692,32 @@ static void pn533_build_cmd_frame(struct pn533 *dev, u8 cmd_code,
        ops->tx_frame_finish(skb->data);
 }
 
-struct pn533_send_async_complete_arg {
-       pn533_send_async_complete_t  complete_cb;
-       void *complete_cb_context;
-       struct sk_buff *resp;
-       struct sk_buff *req;
-};
-
-static int pn533_send_async_complete(struct pn533 *dev, void *_arg, int status)
+static int pn533_send_async_complete(struct pn533 *dev, void *arg, int status)
 {
-       struct pn533_send_async_complete_arg *arg = _arg;
+       struct pn533_cmd *cmd = arg;
 
-       struct sk_buff *req = arg->req;
-       struct sk_buff *resp = arg->resp;
+       struct sk_buff *req = cmd->req;
+       struct sk_buff *resp = cmd->resp;
 
        int rc;
 
        dev_kfree_skb(req);
 
        if (status < 0) {
-               arg->complete_cb(dev, arg->complete_cb_context,
-                                ERR_PTR(status));
+               rc = cmd->complete_cb(dev, cmd->complete_cb_context,
+                                     ERR_PTR(status));
                dev_kfree_skb(resp);
-               kfree(arg);
-               return status;
+               kfree(cmd);
+               return rc;
        }
 
        skb_put(resp, dev->ops->rx_frame_size(resp->data));
        skb_pull(resp, dev->ops->rx_header_len);
        skb_trim(resp, resp->len - dev->ops->rx_tail_len);
 
-       rc = arg->complete_cb(dev, arg->complete_cb_context, resp);
+       rc = cmd->complete_cb(dev, cmd->complete_cb_context, resp);
 
-       kfree(arg);
+       kfree(cmd);
        return rc;
 }
 
@@ -734,19 +728,20 @@ static int __pn533_send_async(struct pn533 *dev, u8 cmd_code,
                              void *complete_cb_context)
 {
        struct pn533_cmd *cmd;
-       struct pn533_send_async_complete_arg *arg;
        int rc = 0;
 
        nfc_dev_dbg(&dev->interface->dev, "Sending command 0x%x", cmd_code);
 
-       arg = kzalloc(sizeof(*arg), GFP_KERNEL);
-       if (!arg)
+       cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
+       if (!cmd)
                return -ENOMEM;
 
-       arg->complete_cb = complete_cb;
-       arg->complete_cb_context = complete_cb_context;
-       arg->resp = resp;
-       arg->req = req;
+       cmd->cmd_code = cmd_code;
+       cmd->req = req;
+       cmd->resp = resp;
+       cmd->resp_len = resp_len;
+       cmd->complete_cb = complete_cb;
+       cmd->complete_cb_context = complete_cb_context;
 
        pn533_build_cmd_frame(dev, cmd_code, req);
 
@@ -754,7 +749,7 @@ static int __pn533_send_async(struct pn533 *dev, u8 cmd_code,
 
        if (!dev->cmd_pending) {
                rc = __pn533_send_frame_async(dev, req, resp, resp_len,
-                                             pn533_send_async_complete, arg);
+                                             pn533_send_async_complete, cmd);
                if (rc)
                        goto error;
 
@@ -765,25 +760,13 @@ static int __pn533_send_async(struct pn533 *dev, u8 cmd_code,
        nfc_dev_dbg(&dev->interface->dev, "%s Queueing command 0x%x", __func__,
                    cmd_code);
 
-       cmd = kzalloc(sizeof(struct pn533_cmd), GFP_KERNEL);
-       if (!cmd) {
-               rc = -ENOMEM;
-               goto error;
-       }
-
        INIT_LIST_HEAD(&cmd->queue);
-       cmd->cmd_code = cmd_code;
-       cmd->req = req;
-       cmd->resp = resp;
-       cmd->resp_len = resp_len;
-       cmd->arg = arg;
-
        list_add_tail(&cmd->queue, &dev->cmd_queue);
 
        goto unlock;
 
 error:
-       kfree(arg);
+       kfree(cmd);
 unlock:
        mutex_unlock(&dev->cmd_lock);
        return rc;
@@ -848,8 +831,8 @@ static int pn533_send_cmd_direct_async(struct pn533 *dev, u8 cmd_code,
                                       pn533_send_async_complete_t complete_cb,
                                       void *complete_cb_context)
 {
-       struct pn533_send_async_complete_arg *arg;
        struct sk_buff *resp;
+       struct pn533_cmd *cmd;
        int rc;
        int resp_len = dev->ops->rx_header_len +
                       dev->ops->max_payload_len +
@@ -859,24 +842,26 @@ static int pn533_send_cmd_direct_async(struct pn533 *dev, u8 cmd_code,
        if (!resp)
                return -ENOMEM;
 
-       arg = kzalloc(sizeof(*arg), GFP_KERNEL);
-       if (!arg) {
+       cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
+       if (!cmd) {
                dev_kfree_skb(resp);
                return -ENOMEM;
        }
 
-       arg->complete_cb = complete_cb;
-       arg->complete_cb_context = complete_cb_context;
-       arg->resp = resp;
-       arg->req = req;
+       cmd->cmd_code = cmd_code;
+       cmd->req = req;
+       cmd->resp = resp;
+       cmd->resp_len = resp_len;
+       cmd->complete_cb = complete_cb;
+       cmd->complete_cb_context = complete_cb_context;
 
        pn533_build_cmd_frame(dev, cmd_code, req);
 
        rc = __pn533_send_frame_async(dev, req, resp, resp_len,
-                                     pn533_send_async_complete, arg);
+                                     pn533_send_async_complete, cmd);
        if (rc < 0) {
                dev_kfree_skb(resp);
-               kfree(arg);
+               kfree(cmd);
        }
 
        return rc;
@@ -903,14 +888,12 @@ static void pn533_wq_cmd(struct work_struct *work)
        mutex_unlock(&dev->cmd_lock);
 
        rc = __pn533_send_frame_async(dev, cmd->req, cmd->resp, cmd->resp_len,
-                                     pn533_send_async_complete, cmd->arg);
+                                     pn533_send_async_complete, cmd);
        if (rc < 0) {
                dev_kfree_skb(cmd->req);
                dev_kfree_skb(cmd->resp);
-               kfree(cmd->arg);
+               kfree(cmd);
        }
-
-       kfree(cmd);
 }
 
 struct pn533_sync_cmd_response {