mei: use consistent naming for TX control flow credits

With the introduction of the receive control flow credits prefixed with
rx_ we add tx_ prefix to the variables and function used for tracking
the transmit control flow credits.

Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

3 files changed, 43 insertions, 45 deletions

diff --git a/drivers/misc/mei/client.c b/drivers/misc/mei/client.c
index ded11de90a26..89425a8795a8 100644
--- a/drivers/misc/mei/client.c
+++ b/drivers/misc/mei/client.c
@@ -734,8 +734,8 @@ void mei_cl_set_disconnected(struct mei_cl *cl)
         mei_io_list_flush(&dev->ctrl_rd_list, cl);
         mei_io_list_flush(&dev->ctrl_wr_list, cl);
         mei_cl_wake_all(cl);
-        cl->mei_flow_ctrl_creds = 0;
         cl->rx_flow_ctrl_creds = 0;
+        cl->tx_flow_ctrl_creds = 0;
         cl->timer_count = 0;
 
         if (!cl->me_cl)
@@ -745,7 +745,7 @@ void mei_cl_set_disconnected(struct mei_cl *cl)
                 cl->me_cl->connect_count--;
 
         if (cl->me_cl->connect_count == 0)
-                cl->me_cl->mei_flow_ctrl_creds = 0;
+                cl->me_cl->tx_flow_ctrl_creds = 0;
 
         mei_me_cl_put(cl->me_cl);
         cl->me_cl = NULL;
@@ -1140,43 +1140,42 @@ err:
         return ERR_PTR(ret);
 }
 
-
-
 /**
- * mei_cl_flow_ctrl_creds - checks flow_control credits for cl.
+ * mei_cl_tx_flow_ctrl_creds - checks flow_control credits for cl.
  *
  * @cl: host client
  *
- * Return: 1 if mei_flow_ctrl_creds >0, 0 - otherwise.
+ * Return: 1 if tx_flow_ctrl_creds >0, 0 - otherwise.
  */
-static int mei_cl_flow_ctrl_creds(struct mei_cl *cl)
+static int mei_cl_tx_flow_ctrl_creds(struct mei_cl *cl)
 {
         if (WARN_ON(!cl || !cl->me_cl))
                 return -EINVAL;
 
-        if (cl->mei_flow_ctrl_creds > 0)
+        if (cl->tx_flow_ctrl_creds > 0)
                 return 1;
 
         if (mei_cl_is_fixed_address(cl))
                 return 1;
 
         if (mei_cl_is_single_recv_buf(cl)) {
-                if (cl->me_cl->mei_flow_ctrl_creds > 0)
+                if (cl->me_cl->tx_flow_ctrl_creds > 0)
                         return 1;
         }
         return 0;
 }
 
 /**
- * mei_cl_flow_ctrl_reduce - reduces flow_control.
+ * mei_cl_tx_flow_ctrl_creds_reduce - reduces transmit flow control credits
+ *   for a client
  *
- * @cl: private data of the file object
+ * @cl: host client
  *
  * Return:
  *      0 on success
  *      -EINVAL when ctrl credits are <= 0
  */
-static int mei_cl_flow_ctrl_reduce(struct mei_cl *cl)
+static int mei_cl_tx_flow_ctrl_creds_reduce(struct mei_cl *cl)
 {
         if (WARN_ON(!cl || !cl->me_cl))
                 return -EINVAL;
@@ -1185,13 +1184,13 @@ static int mei_cl_flow_ctrl_reduce(struct mei_cl *cl)
                 return 0;
 
         if (mei_cl_is_single_recv_buf(cl)) {
-                if (WARN_ON(cl->me_cl->mei_flow_ctrl_creds <= 0))
+                if (WARN_ON(cl->me_cl->tx_flow_ctrl_creds <= 0))
                         return -EINVAL;
-                cl->me_cl->mei_flow_ctrl_creds--;
+                cl->me_cl->tx_flow_ctrl_creds--;
         } else {
-                if (WARN_ON(cl->mei_flow_ctrl_creds <= 0))
+                if (WARN_ON(cl->tx_flow_ctrl_creds <= 0))
                         return -EINVAL;
-                cl->mei_flow_ctrl_creds--;
+                cl->tx_flow_ctrl_creds--;
         }
         return 0;
 }
@@ -1511,7 +1510,7 @@ int mei_cl_irq_write(struct mei_cl *cl, struct mei_cl_cb *cb,
 
         first_chunk = cb->buf_idx == 0;
 
-        rets = first_chunk ? mei_cl_flow_ctrl_creds(cl) : 1;
+        rets = first_chunk ? mei_cl_tx_flow_ctrl_creds(cl) : 1;
         if (rets < 0)
                 return rets;
 
@@ -1559,7 +1558,7 @@ int mei_cl_irq_write(struct mei_cl *cl, struct mei_cl_cb *cb,
         cb->completed = mei_hdr.msg_complete == 1;
 
         if (first_chunk) {
-                if (mei_cl_flow_ctrl_reduce(cl))
+                if (mei_cl_tx_flow_ctrl_creds_reduce(cl))
                         return -EIO;
         }
 
@@ -1617,7 +1616,7 @@ int mei_cl_write(struct mei_cl *cl, struct mei_cl_cb *cb, bool blocking)
         mei_hdr.msg_complete = 0;
         mei_hdr.internal = cb->internal;
 
-        rets = mei_cl_flow_ctrl_creds(cl);
+        rets = mei_cl_tx_flow_ctrl_creds(cl);
         if (rets < 0)
                 goto err;
 
@@ -1645,7 +1644,7 @@ int mei_cl_write(struct mei_cl *cl, struct mei_cl_cb *cb, bool blocking)
         if (rets)
                 goto err;
 
-        rets = mei_cl_flow_ctrl_reduce(cl);
+        rets = mei_cl_tx_flow_ctrl_creds_reduce(cl);
         if (rets)
                 goto err;
 
diff --git a/drivers/misc/mei/hbm.c b/drivers/misc/mei/hbm.c
index b1697a329af1..c8e8a8d22019 100644
--- a/drivers/misc/mei/hbm.c
+++ b/drivers/misc/mei/hbm.c
@@ -340,7 +340,7 @@ static int mei_hbm_me_cl_add(struct mei_device *dev,
 
         me_cl->props = res->client_properties;
         me_cl->client_id = res->me_addr;
-        me_cl->mei_flow_ctrl_creds = 0;
+        me_cl->tx_flow_ctrl_creds = 0;
 
         mei_me_cl_add(dev, me_cl);
 
@@ -637,23 +637,22 @@ int mei_hbm_cl_flow_control_req(struct mei_device *dev, struct mei_cl *cl)
 }
 
 /**
- * mei_hbm_add_single_flow_creds - adds single buffer credentials.
+ * mei_hbm_add_single_tx_flow_ctrl_creds - adds single buffer credentials.
  *
  * @dev: the device structure
- * @flow: flow control.
+ * @fctrl: flow control response bus message
  *
  * Return: 0 on success, < 0 otherwise
  */
-static int mei_hbm_add_single_flow_creds(struct mei_device *dev,
-                                  struct hbm_flow_control *flow)
+static int mei_hbm_add_single_tx_flow_ctrl_creds(struct mei_device *dev,
+                                                 struct hbm_flow_control *fctrl)
 {
         struct mei_me_client *me_cl;
         int rets;
 
-        me_cl = mei_me_cl_by_id(dev, flow->me_addr);
+        me_cl = mei_me_cl_by_id(dev, fctrl->me_addr);
         if (!me_cl) {
-                dev_err(dev->dev, "no such me client %d\n",
-                        flow->me_addr);
+                dev_err(dev->dev, "no such me client %d\n", fctrl->me_addr);
                 return -ENOENT;
         }
 
@@ -662,9 +661,9 @@ static int mei_hbm_add_single_flow_creds(struct mei_device *dev,
                 goto out;
         }
 
-        me_cl->mei_flow_ctrl_creds++;
+        me_cl->tx_flow_ctrl_creds++;
         dev_dbg(dev->dev, "recv flow ctrl msg ME %d (single) creds = %d.\n",
-            flow->me_addr, me_cl->mei_flow_ctrl_creds);
+                fctrl->me_addr, me_cl->tx_flow_ctrl_creds);
 
         rets = 0;
 out:
@@ -676,24 +675,24 @@ out:
  * mei_hbm_cl_flow_control_res - flow control response from me
  *
  * @dev: the device structure
- * @flow_control: flow control response bus message
+ * @fctrl: flow control response bus message
  */
-static void mei_hbm_cl_flow_control_res(struct mei_device *dev,
-                                        struct hbm_flow_control *flow_control)
+static void mei_hbm_cl_tx_flow_ctrl_creds_res(struct mei_device *dev,
+                                               struct hbm_flow_control *fctrl)
 {
         struct mei_cl *cl;
 
-        if (!flow_control->host_addr) {
+        if (!fctrl->host_addr) {
                 /* single receive buffer */
-                mei_hbm_add_single_flow_creds(dev, flow_control);
+                mei_hbm_add_single_tx_flow_ctrl_creds(dev, fctrl);
                 return;
         }
 
-        cl = mei_hbm_cl_find_by_cmd(dev, flow_control);
+        cl = mei_hbm_cl_find_by_cmd(dev, fctrl);
         if (cl) {
-                cl->mei_flow_ctrl_creds++;
+                cl->tx_flow_ctrl_creds++;
                 cl_dbg(dev, cl, "flow control creds = %d.\n",
-                                cl->mei_flow_ctrl_creds);
+                                cl->tx_flow_ctrl_creds);
         }
 }
 
@@ -1023,7 +1022,7 @@ int mei_hbm_dispatch(struct mei_device *dev, struct mei_msg_hdr *hdr)
 
         struct mei_hbm_cl_cmd *cl_cmd;
         struct hbm_client_connect_request *disconnect_req;
-        struct hbm_flow_control *flow_control;
+        struct hbm_flow_control *fctrl;
 
         /* read the message to our buffer */
         BUG_ON(hdr->length >= sizeof(dev->rd_msg_buf));
@@ -1103,8 +1102,8 @@ int mei_hbm_dispatch(struct mei_device *dev, struct mei_msg_hdr *hdr)
         case MEI_FLOW_CONTROL_CMD:
                 dev_dbg(dev->dev, "hbm: client flow control response: message received.\n");
 
-                flow_control = (struct hbm_flow_control *) mei_msg;
-                mei_hbm_cl_flow_control_res(dev, flow_control);
+                fctrl = (struct hbm_flow_control *)mei_msg;
+                mei_hbm_cl_tx_flow_ctrl_creds_res(dev, fctrl);
                 break;
 
         case MEI_PG_ISOLATION_ENTRY_RES_CMD:
diff --git a/drivers/misc/mei/mei_dev.h b/drivers/misc/mei/mei_dev.h
index 8bdb28054423..7c8fa8d70e11 100644
--- a/drivers/misc/mei/mei_dev.h
+++ b/drivers/misc/mei/mei_dev.h
@@ -144,7 +144,7 @@ struct mei_fw_status {
  * @refcnt: struct reference count
  * @props: client properties
  * @client_id: me client id
- * @mei_flow_ctrl_creds: flow control credits
+ * @tx_flow_ctrl_creds: flow control credits
  * @connect_count: number connections to this client
  * @bus_added: added to bus
  */
@@ -153,7 +153,7 @@ struct mei_me_client {
         struct kref refcnt;
         struct mei_client_properties props;
         u8 client_id;
-        u8 mei_flow_ctrl_creds;
+        u8 tx_flow_ctrl_creds;
         u8 connect_count;
         u8 bus_added;
 };
@@ -202,7 +202,7 @@ struct mei_cl_cb {
  * @me_cl: fw client connected
  * @fp: file associated with client
  * @host_client_id: host id
- * @mei_flow_ctrl_creds: transmit flow credentials
+ * @tx_flow_ctrl_creds: transmit flow credentials
  * @rx_flow_ctrl_creds: receive flow credentials
  * @timer_count:  watchdog timer for operation completion
  * @notify_en: notification - enabled/disabled
@@ -226,7 +226,7 @@ struct mei_cl {
         struct mei_me_client *me_cl;
         const struct file *fp;
         u8 host_client_id;
-        u8 mei_flow_ctrl_creds;
+        u8 tx_flow_ctrl_creds;
         u8 rx_flow_ctrl_creds;
         u8 timer_count;
         u8 notify_en;