linux-kernel - [PATCH v1 5/6] serial: 8250_platform: Remove unneeded ->iotype assignment

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Message-ID: <20250124161530.398361-6-andriy.shevchenko@linux.intel.com>
Date: Fri, 24 Jan 2025 18:10:50 +0200
From: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
	Guanbing Huang <albanhuang@...cent.com>,
	linux-kernel@...r.kernel.org,
	linux-serial@...r.kernel.org
Cc: Jiri Slaby <jirislaby@...nel.org>
Subject: [PATCH v1 5/6] serial: 8250_platform: Remove unneeded ->iotype assignment

If ->iobase is set the default will be UPIO_PORT for ->iotype after
the uart_read_and_validate_port_properties() call. Hence no need
to assign that explicitly. Otherwise it will be UPIO_MEM.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
---
 drivers/tty/serial/8250/8250_platform.c | 9 ---------
 1 file changed, 9 deletions(-)

diff --git a/drivers/tty/serial/8250/8250_platform.c b/drivers/tty/serial/8250/8250_platform.c
index 348b7fa2e94d..d8cbd8d87b0e 100644
--- a/drivers/tty/serial/8250/8250_platform.c
+++ b/drivers/tty/serial/8250/8250_platform.c
@@ -112,7 +112,6 @@ static int serial8250_probe_acpi(struct platform_device *pdev)
 	struct device *dev = &pdev->dev;
 	struct uart_8250_port uart = { };
 	struct resource *regs;
-	unsigned char iotype;
 	int ret, line;
 
 	regs = platform_get_mem_or_io(pdev, 0);
@@ -122,13 +121,11 @@ static int serial8250_probe_acpi(struct platform_device *pdev)
 	switch (resource_type(regs)) {
 	case IORESOURCE_IO:
 		uart.port.iobase = regs->start;
-		iotype = UPIO_PORT;
 		break;
 	case IORESOURCE_MEM:
 		uart.port.mapbase = regs->start;
 		uart.port.mapsize = resource_size(regs);
 		uart.port.flags = UPF_IOREMAP;
-		iotype = UPIO_MEM;
 		break;
 	default:
 		return -EINVAL;
@@ -147,12 +144,6 @@ static int serial8250_probe_acpi(struct platform_device *pdev)
 	if (ret)
 		return ret;
 
-	/*
-	 * The previous call may not set iotype correctly when reg-io-width
-	 * property is absent and it doesn't support IO port resource.
-	 */
-	uart.port.iotype = iotype;
-
 	line = serial8250_register_8250_port(&uart);
 	if (line < 0)
 		return line;
-- 
2.43.0.rc1.1336.g36b5255a03ac