[PATCH v2 09/15] serial: 8250_mxpcie: introduce per-port private data structure

[Crescent Hsieh <crescentcy.hsieh@moxa.com>]

Introduce a private per-port data structure for the mxpcie driver and
replace the shared flexible array of registered lines with an array of
per-port objects.

This prepares the driver for storing per-port state needed by subsequent
features.

No functional change intended.

Signed-off-by: Crescent Hsieh <crescentcy.hsieh@moxa.com>
---
 drivers/tty/serial/8250/8250_mxpcie.c | 16 ++++++++++------
 1 file changed, 10 insertions(+), 6 deletions(-)

diff --git a/drivers/tty/serial/8250/8250_mxpcie.c b/drivers/tty/serial/8250/8250_mxpcie.c
index 8d38f7d80282..63885348c14c 100644
--- a/drivers/tty/serial/8250/8250_mxpcie.c
+++ b/drivers/tty/serial/8250/8250_mxpcie.c
@@ -104,12 +104,16 @@
 #define MOXA_EVEN_RS_MASK	GENMASK(3, 0)
 #define MOXA_ODD_RS_MASK	GENMASK(7, 4)
 
+struct mxpcie8250_port {
+	int line;
+};
+
 struct mxpcie8250 {
 	unsigned int supp_rs;
 	unsigned int num_ports;
 	void __iomem *bar1_base; /* UART registers (MMIO) */
 	void __iomem *bar2_base; /* UIR / GPIO / CPLD (IO) */
-	int line[] __counted_by(num_ports);
+	struct mxpcie8250_port port[] __counted_by(num_ports);
 };
 
 enum {
@@ -445,7 +449,7 @@ static int mxpcie8250_probe(struct pci_dev *pdev, const struct pci_device_id *id
 
 	num_ports = mxpcie8250_get_nports(device);
 
-	priv = devm_kzalloc(dev, struct_size(priv, line, num_ports), GFP_KERNEL);
+	priv = devm_kzalloc(dev, struct_size(priv, port, num_ports), GFP_KERNEL);
 	if (!priv)
 		return -ENOMEM;
 
@@ -485,12 +489,12 @@ static int mxpcie8250_probe(struct pci_dev *pdev, const struct pci_device_id *id
 		dev_dbg(dev, "Setup PCI port: port %lx, irq %d, type %d\n",
 			up.port.iobase, up.port.irq, up.port.iotype);
 
-		priv->line[i] = serial8250_register_8250_port(&up);
-		if (priv->line[i] < 0) {
+		priv->port[i].line = serial8250_register_8250_port(&up);
+		if (priv->port[i].line < 0) {
 			dev_err(dev,
 				"Couldn't register serial port %lx, irq %d, type %d, error %d\n",
 				up.port.iobase, up.port.irq,
-				up.port.iotype, priv->line[i]);
+				up.port.iotype, priv->port[i].line);
 			break;
 		}
 	}
@@ -504,7 +508,7 @@ static void mxpcie8250_remove(struct pci_dev *pdev)
 	struct mxpcie8250 *priv = pci_get_drvdata(pdev);
 
 	for (unsigned int i = 0; i < priv->num_ports; i++)
-		serial8250_unregister_port(priv->line[i]);
+		serial8250_unregister_port(priv->port[i].line);
 }
 
 static const struct pci_device_id mxpcie8250_pci_ids[] = {
-- 
2.45.2