linux-kernel - [PATCH 5.4 11/92] serial: 8250-mtk: Use platform_get_irq

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Message-Id: <20191211150224.318475806@linuxfoundation.org>
Date:   Wed, 11 Dec 2019 16:05:02 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Frank Wunderlich <frank-w@...lic-files.de>
Subject: [PATCH 5.4 11/92] serial: 8250-mtk: Use platform_get_irq_optional() for optional irq

From: Frank Wunderlich <frank-w@...lic-files.de>

commit eb9c1a41ea1234907615fe47d6e47db8352d744b upstream.

As platform_get_irq() now prints an error when the interrupt does not
exist, this warnings are printed on bananapi-r2:

[    4.935780] mt6577-uart 11004000.serial: IRQ index 1 not found
[    4.962589] 11002000.serial: ttyS1 at MMIO 0x11002000 (irq = 202, base_baud = 1625000) is a ST16650V2
[    4.972127] mt6577-uart 11002000.serial: IRQ index 1 not found
[    4.998927] 11003000.serial: ttyS2 at MMIO 0x11003000 (irq = 203, base_baud = 1625000) is a ST16650V2
[    5.008474] mt6577-uart 11003000.serial: IRQ index 1 not found

Fix this by calling platform_get_irq_optional() instead.

now it looks like this:

[    4.872751] Serial: 8250/16550 driver, 4 ports, IRQ sharing disabled

Fixes: 7723f4c5ecdb8d83 ("driver core: platform: Add an error message to platform_get_irq*()")
Signed-off-by: Frank Wunderlich <frank-w@...lic-files.de>
Cc: stable <stable@...r.kernel.org>
Link: https://lore.kernel.org/r/20191027062117.20389-1-frank-w@public-files.de
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/tty/serial/8250/8250_mtk.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/tty/serial/8250/8250_mtk.c
+++ b/drivers/tty/serial/8250/8250_mtk.c
@@ -544,7 +544,7 @@ static int mtk8250_probe(struct platform
 	pm_runtime_set_active(&pdev->dev);
 	pm_runtime_enable(&pdev->dev);
 
-	data->rx_wakeup_irq = platform_get_irq(pdev, 1);
+	data->rx_wakeup_irq = platform_get_irq_optional(pdev, 1);
 
 	return 0;
 }