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([183.91.15.56]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-84f5a552859sm715908b3a.42.2026.08.07.02.10.15 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 07 Aug 2026 02:10:21 -0700 (PDT) From: phucduc.bui@gmail.com To: Jiri Slaby , Greg Kroah-Hartman , Frank Li , AngeloGioacchino Del Regno , Sascha Hauer , Fabio Estevam , Yenchia Chen , Daniel Golle , Zhiyong Tao , Sherry Sun , Robin Gong , Viken Dadhaniya , Praveen Talari Cc: Matthias Brugger , Pengutronix Kernel Team , Zong Jiang , Konrad Dybcio , Aniket Randive , Kathiravan Thirumoorthy , Anup Kulkarni , Krzysztof Kozlowski , linux-kernel@vger.kernel.org, linux-serial@vger.kernel.org, linux-mediatek@lists.infradead.org, imx@lists.linux.dev, linux-arm-msm@vger.kernel.org, linux-arm-kernel@lists.infradead.org, bui duc phuc Subject: [PATCH 3/3] serial: 8250_mtk: Propagate errors from optional IRQ lookup Date: Fri, 7 Aug 2026 16:09:45 +0700 Message-ID: <20260807090945.41690-3-phucduc.bui@gmail.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260807090945.41690-1-phucduc.bui@gmail.com> References: <20260807090945.41690-1-phucduc.bui@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260807_021022_791334_84ACABF9 X-CRM114-Status: GOOD ( 12.55 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org From: bui duc phuc platform_get_irq_optional() returns a positive IRQ number on success or a negative error code on failure. For an optional IRQ, -ENXIO indicates that no IRQ is available, while other errors should be propagated. Propagate errors such as -EPROBE_DEFER and -EINVAL instead of continuing probe without the IRQ. Signed-off-by: bui duc phuc --- drivers/tty/serial/8250/8250_mtk.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/tty/serial/8250/8250_mtk.c b/drivers/tty/serial/8250/8250_mtk.c index e6a56cf54ae0..d0d2aecf9005 100644 --- a/drivers/tty/serial/8250/8250_mtk.c +++ b/drivers/tty/serial/8250/8250_mtk.c @@ -587,6 +587,8 @@ static int mtk8250_probe(struct platform_device *pdev) return data->line; data->rx_wakeup_irq = platform_get_irq_optional(pdev, 1); + if (data->rx_wakeup_irq < 0 && data->rx_wakeup_irq != -ENXIO) + return data->rx_wakeup_irq; pm_runtime_set_active(&pdev->dev); pm_runtime_enable(&pdev->dev); -- 2.43.0