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Sun, 23 Aug 2026 10:59:11 -0700 (PDT) From: Javier Carrasco Date: Sun, 23 Aug 2026 19:59:03 +0200 Subject: [PATCH v2 3/4] hwmon: chipcap2: enable IRQ processing when regulator is already enabled Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20260823-chipcap2_locks-v2-3-6a26c8e9e2fc@gmail.com> References: <20260823-chipcap2_locks-v2-0-6a26c8e9e2fc@gmail.com> In-Reply-To: <20260823-chipcap2_locks-v2-0-6a26c8e9e2fc@gmail.com> To: Guenter Roeck Cc: linux-hwmon@vger.kernel.org, linux-kernel@vger.kernel.org, Javier Carrasco , stable@vger.kernel.org X-Mailer: b4 0.13.0 X-Developer-Signature: v=1; a=ed25519-sha256; t=1787507945; l=1283; i=javier.carrasco.cruz@gmail.com; s=20260111; h=from:subject:message-id; bh=jbfRCvEVo3PuhpBjVfzgqvGIah0vGZmzLa1w2pHljmU=; b=kwvqnY0uG0GB80exLrAofUbi7prlQZmWnSwEK59YHfIqnudHlnvBDtNFttK/K2rgEvp1vUqjj 8Vfg7za3iyuCxZ4rwuKc4797TshpHKEyMmCTfORZwH1Jg7EMC/yJzQq X-Developer-Key: i=javier.carrasco.cruz@gmail.com; a=ed25519; pk=Lge8w8xidNSf/INy7JAIbAW+Hezkp3nsBh2OjKL7lLU= cc2_enable() returns early when the regulator is already enabled. This can happen if a previous regulator_disable() failed or if the regulator was configured as always-on. In this case, process_irqs remains false, causing the ready interrupt to be ignored. Subsequent operations waiting for the ready completion then time out. Set process_irqs before returning when the regulator is already enabled, so that the driver continues to process ready interrupts. Fixes: 3af350929e75 ("hwmon: Add support for Amphenol ChipCap 2") Cc: stable@vger.kernel.org Signed-off-by: Javier Carrasco --- drivers/hwmon/chipcap2.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/hwmon/chipcap2.c b/drivers/hwmon/chipcap2.c index 15630d1dd90a..57d22d65612c 100644 --- a/drivers/hwmon/chipcap2.c +++ b/drivers/hwmon/chipcap2.c @@ -119,8 +119,10 @@ static int cc2_enable(struct cc2_data *data) int ret; /* exclusive regulator, check in case a disable failed */ - if (regulator_is_enabled(data->regulator)) + if (regulator_is_enabled(data->regulator)) { + data->process_irqs = true; return 0; + } /* clear any pending completion */ try_wait_for_completion(&data->complete); -- 2.43.0