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Fri, 25 Sep 2026 11:30:53 -0700 (PDT) Received: from ryzen.lan ([2601:644:8000:7a86::e34]) by smtp.gmail.com with ESMTPSA id 46e09a7af769-818e8beb374sm3181560a34.10.2026.09.25.11.30.51 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 25 Sep 2026 11:30:52 -0700 (PDT) From: Rosen Penev To: linux-serial@vger.kernel.org Cc: Vineet Gupta , Greg Kroah-Hartman , Jiri Slaby , linux-snps-arc@lists.infradead.org (open list:SYNOPSYS ARC ARCHITECTURE), linux-kernel@vger.kernel.org (open list:TTY LAYER AND SERIAL DRIVERS) Subject: [PATCH] serial: arc_uart: Use platform IRQ helper Date: Fri, 25 Sep 2026 11:30:50 -0700 Message-ID: <20260925183050.56839-1-rosenp@gmail.com> X-Mailer: git-send-email 2.55.0 Precedence: bulk X-Mailing-List: linux-serial@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Avoid calling irq_dispose_mapping() by letting the platform_device machinery handle it. Also enable possibility of handling -EPROBE_DEFER and other errors. Handle as early as possible to avoid doing unnecessary work. Signed-off-by: Rosen Penev --- drivers/tty/serial/arc_uart.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) diff --git a/drivers/tty/serial/arc_uart.c b/drivers/tty/serial/arc_uart.c index 3988e5958896..b46b057a181b 100644 --- a/drivers/tty/serial/arc_uart.c +++ b/drivers/tty/serial/arc_uart.c @@ -30,7 +30,6 @@ #include #include #include -#include #include /************************************* @@ -571,12 +570,17 @@ static int arc_serial_probe(struct platform_device *pdev) struct arc_uart_port *uart; struct uart_port *port; int dev_id; + int irq; u32 val; /* no device tree device */ if (!np) return -ENODEV; + irq = platform_get_irq(pdev, 0); + if (irq < 0) + return irq; + dev_id = of_alias_get_id(np, "serial"); if (dev_id < 0) dev_id = 0; @@ -607,7 +611,7 @@ static int arc_serial_probe(struct platform_device *pdev) return PTR_ERR(port->membase); } - port->irq = irq_of_parse_and_map(np, 0); + port->irq = irq; port->dev = &pdev->dev; port->iotype = UPIO_MEM; -- 2.55.0