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([183.91.15.56]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-2d16c4a773esm5055305ad.65.2026.08.07.01.05.21 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 07 Aug 2026 01:05:24 -0700 (PDT) From: phucduc.bui@gmail.com To: Wim Van Sebroeck , Guenter Roeck , Maxime Coquelin , Alexandre Torgue , linux-watchdog@vger.kernel.org Cc: linux-kernel@vger.kernel.org, linux-stm32@st-md-mailman.stormreply.com, linux-arm-kernel@lists.infradead.org, bui duc phuc Subject: [PATCH v2 2/2] watchdog: stm32_iwdg: Propagate errors from optional IRQ lookup Date: Fri, 7 Aug 2026 15:04:47 +0700 Message-ID: <20260807080447.35479-2-phucduc.bui@gmail.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260807080447.35479-1-phucduc.bui@gmail.com> References: <20260807080447.35479-1-phucduc.bui@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 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 --- Link v1: https://lore.kernel.org/all/20260806062812.26523-2-phucduc.bui@gmail.com/ Changes in v2: - Update the commit message and error handling. - Propagate all errors from platform_get_irq_optional() except -ENXIO, instead of only handling -EPROBE_DEFER. drivers/watchdog/stm32_iwdg.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/drivers/watchdog/stm32_iwdg.c b/drivers/watchdog/stm32_iwdg.c index b356a272ff9a..a8d2db2d3cf8 100644 --- a/drivers/watchdog/stm32_iwdg.c +++ b/drivers/watchdog/stm32_iwdg.c @@ -287,8 +287,11 @@ static int stm32_iwdg_irq_init(struct platform_device *pdev, return 0; irq = platform_get_irq_optional(pdev, 0); - if (irq <= 0) + if (irq < 0) { + if (irq != -ENXIO) + return irq; return 0; + } if (of_property_read_bool(np, "wakeup-source")) { ret = devm_device_init_wakeup(dev); -- 2.43.0