netdev - [PATCH V5 net-next 1/2] net: wwan: t7xx: use union to group port type specific data

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Date:   Sun, 23 Oct 2022 03:01:30 +0530
From:   m.chetan.kumar@...ux.intel.com
To:     netdev@...r.kernel.org
Cc:     kuba@...nel.org, davem@...emloft.net, johannes@...solutions.net,
        ryazanov.s.a@...il.com, loic.poulain@...aro.org,
        krishna.c.sudi@...el.com, m.chetan.kumar@...ux.intel.com,
        linuxwwan@...el.com, linuxwwan_5g@...el.com
Subject: [PATCH V5 net-next 1/2] net: wwan: t7xx: use union to group port type specific data

From: M Chetan Kumar <m.chetan.kumar@...ux.intel.com>

Use union inside t7xx_port to group port type specific data members.

Signed-off-by: M Chetan Kumar <m.chetan.kumar@...ux.intel.com>
Reviewed-by: Sergey Ryazanov <ryazanov.s.a@...il.com>
--
v5:
 * Date correction.
---
 drivers/net/wwan/t7xx/t7xx_port.h      |  6 +++++-
 drivers/net/wwan/t7xx/t7xx_port_wwan.c | 16 ++++++++--------
 2 files changed, 13 insertions(+), 9 deletions(-)

diff --git a/drivers/net/wwan/t7xx/t7xx_port.h b/drivers/net/wwan/t7xx/t7xx_port.h
index dc4133eb433a..fbc6d724b7c2 100644
--- a/drivers/net/wwan/t7xx/t7xx_port.h
+++ b/drivers/net/wwan/t7xx/t7xx_port.h
@@ -99,7 +99,6 @@ struct t7xx_port_conf {
 struct t7xx_port {
 	/* Members not initialized in definition */
 	const struct t7xx_port_conf	*port_conf;
-	struct wwan_port		*wwan_port;
 	struct t7xx_pci_dev		*t7xx_dev;
 	struct device			*dev;
 	u16				seq_nums[2];	/* TX/RX sequence numbers */
@@ -122,6 +121,11 @@ struct t7xx_port {
 	int				rx_length_th;
 	bool				chan_enable;
 	struct task_struct		*thread;
+	union {
+		struct {
+			struct wwan_port		*wwan_port;
+		} wwan;
+	};
 };

 struct sk_buff *t7xx_port_alloc_skb(int payload);
diff --git a/drivers/net/wwan/t7xx/t7xx_port_wwan.c b/drivers/net/wwan/t7xx/t7xx_port_wwan.c
index 33931bfd78fd..24bd21942403 100644
--- a/drivers/net/wwan/t7xx/t7xx_port_wwan.c
+++ b/drivers/net/wwan/t7xx/t7xx_port_wwan.c
@@ -109,12 +109,12 @@ static int t7xx_port_wwan_init(struct t7xx_port *port)

 static void t7xx_port_wwan_uninit(struct t7xx_port *port)
 {
-	if (!port->wwan_port)
+	if (!port->wwan.wwan_port)
 		return;

 	port->rx_length_th = 0;
-	wwan_remove_port(port->wwan_port);
-	port->wwan_port = NULL;
+	wwan_remove_port(port->wwan.wwan_port);
+	port->wwan.wwan_port = NULL;
 }

 static int t7xx_port_wwan_recv_skb(struct t7xx_port *port, struct sk_buff *skb)
@@ -129,7 +129,7 @@ static int t7xx_port_wwan_recv_skb(struct t7xx_port *port, struct sk_buff *skb)
 		return 0;
 	}

-	wwan_port_rx(port->wwan_port, skb);
+	wwan_port_rx(port->wwan.wwan_port, skb);
 	return 0;
 }

@@ -158,10 +158,10 @@ static void t7xx_port_wwan_md_state_notify(struct t7xx_port *port, unsigned int
 	if (state != MD_STATE_READY)
 		return;

-	if (!port->wwan_port) {
-		port->wwan_port = wwan_create_port(port->dev, port_conf->port_type,
-						   &wwan_ops, port);
-		if (IS_ERR(port->wwan_port))
+	if (!port->wwan.wwan_port) {
+		port->wwan.wwan_port = wwan_create_port(port->dev, port_conf->port_type,
+							&wwan_ops, port);
+		if (IS_ERR(port->wwan.wwan_port))
 			dev_err(port->dev, "Unable to create WWWAN port %s", port_conf->name);
 	}
 }
--
2.34.1