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([183.91.15.56]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-2d0aa4bda53sm25370095ad.63.2026.08.05.23.28.27 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 05 Aug 2026 23:28:29 -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 2/2] watchdog: stm32_iwdg: Propagate -EPROBE_DEFER from IRQ lookup Date: Thu, 6 Aug 2026 13:28:12 +0700 Message-ID: <20260806062812.26523-2-phucduc.bui@gmail.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260806062812.26523-1-phucduc.bui@gmail.com> References: <20260806062812.26523-1-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-20260805_232831_059125_9237EFA4 X-CRM114-Status: GOOD ( 13.87 ) 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() does not returns 0. It returns a positive IRQ number on success or a negative error code on failure. Return -EPROBE_DEFER from platform_get_irq_optional() so the driver is re-probed when the interrupt resource becomes available instead of continuing probe without an IRQ. Signed-off-by: bui duc phuc --- drivers/watchdog/stm32_iwdg.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/watchdog/stm32_iwdg.c b/drivers/watchdog/stm32_iwdg.c index b356a272ff9a..102f51084957 100644 --- a/drivers/watchdog/stm32_iwdg.c +++ b/drivers/watchdog/stm32_iwdg.c @@ -287,7 +287,9 @@ static int stm32_iwdg_irq_init(struct platform_device *pdev, return 0; irq = platform_get_irq_optional(pdev, 0); - if (irq <= 0) + if (irq == -EPROBE_DEFER) + return irq; + if (irq < 0) return 0; if (of_property_read_bool(np, "wakeup-source")) { -- 2.43.0