patch "serial: samsung: Removes the IRQ not found warning" added to tty-linus

This is a note to let you know that I've just added the patch titled

serial: samsung: Removes the IRQ not found warning

to my tty git tree which can be found at
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty.git
in the tty-linus branch.

The patch will show up in the next release of the linux-next tree (usually sometime within the next 24 hours during the week.)

The patch will hopefully also be merged in Linus's tree for the next -rc kernel release.

If you have any questions about this process, please let me know.

From 8c6c378b0cbe0c9f1390986b5f8ffb5f6ff7593b Mon Sep 17 00:00:00 2001
From: Tamseel Shams <[email protected]>
Date: Mon, 10 Aug 2020 08:30:21 +0530
Subject: serial: samsung: Removes the IRQ not found warning

In few older Samsung SoCs like s3c2410, s3c2412 and s3c2440, UART IP is having 2 interrupt lines. However, in other SoCs like s3c6400, s5pv210, exynos5433, and exynos4210 UART is having only 1 interrupt line. Due to this, "platform_get_irq(platdev, 1)" call in the driver gives the following false-positive error:
"IRQ index 1 not found" on newer SoC's.

This patch adds the condition to check for Tx interrupt only for the those SoC's which have 2 interrupt lines.

---
 drivers/tty/serial/samsung_tty.c | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

index 8ed3482d2e1e..8ae3e03fbd8c 100644
@@ -1905,9 +1905,11 @@ static int s3c24xx_serial_init_port(struct s3c24xx_uart_port *ourport,
 		ourport->tx_irq = ret + 1;
 	}
 
-	ret = platform_get_irq(platdev, 1);
-	if (ret > 0)
-		ourport->tx_irq = ret;
+	if (!s3c24xx_serial_has_interrupt_mask(port)) {
+		ret = platform_get_irq(platdev, 1);
+		if (ret > 0)
+			ourport->tx_irq = ret;
+	}
 	/*
 	 * DMA is currently supported only on DT platforms, if DMA properties
 	 * are specified.

2.28.0