From nobody Fri Sep 25 04:41:10 2026 Received: from cstnet.cn (smtp25.cstnet.cn [159.226.251.25]) (using TLSv1.2 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id B151F3859DC; Wed, 16 Sep 2026 16:39:26 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=159.226.251.25 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789576770; cv=none; b=MHzMlBVHZc5Z4pbUl6pdEmGp5+xPhLBQB63wrfX4/rVThCLtTalQ2s5uFvy2eHHz0aSSTODpXm9ndXKrTIDiFOZMVoVe3MWUrf8/lSp6OH26DzIs5cl96pU7fGqU67WmvI0X1upzh8Mck4PeiSxBbWGGlK3uxjU9gqsBofWsOtw= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789576770; c=relaxed/simple; bh=B61Ra12zeoK9XG2kSJuOAnLgLOmAa0B5tmcXfFgbSko=; h=From:To:Cc:Subject:Date:Message-Id:MIME-Version; b=hMs7/7aDWq4+IgWZ3+wLVC1koSL43W8CSD2T8oSuLe9vqY89tDhpdHZ0oWg9c8/nSJPfFVVZe85XjWSGAjye+WwLZwlKT/BFjWjUY0uY2Nu8QEhG/n3+GMO8wpfcdDN17OTl+843bbbpUa+f/t4aLDVW9VBkSF+Du3YvEiColvY= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=iscas.ac.cn; spf=pass smtp.mailfrom=iscas.ac.cn; arc=none smtp.client-ip=159.226.251.25 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=iscas.ac.cn Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=iscas.ac.cn Received: from dfae2b116770.home.arpa (unknown [36.110.52.2]) by APP-05 (Coremail) with SMTP id zQCowAA3pD44xqpq0M5tCA--.21474S2; Thu, 17 Sep 2026 00:39:20 +0800 (CST) From: Wentao Liang To: andy@kernel.org Cc: dlechner@baylibre.com, jic23@kernel.org, linux-iio@vger.kernel.org, linux-kernel@vger.kernel.org, nuno.sa@analog.com, rajat.khandelwal@linux.intel.com, Wentao Liang , stable@vger.kernel.org Subject: [PATCH] iio: pressure: mpl115: Fix runtime PM leak in mpl115_read_raw() Date: Wed, 16 Sep 2026 16:38:52 +0000 Message-Id: <20260916163852.2084375-1-vulab@iscas.ac.cn> X-Mailer: git-send-email 2.34.1 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-CM-TRANSID: zQCowAA3pD44xqpq0M5tCA--.21474S2 X-Coremail-Antispam: 1UD129KBjvJXoW7Ar43Wr43Ww4kGryUKF47twb_yoW8Xry7pr W7ZFWYyry8Jr4xJw40yF1DuFy5WayfKrW7JrZ7Wa18Zw45Z3W5tFyUJr1rtF10kF95Zrs8 X34DtF45CF1SyFJanT9S1TB71UUUUU7qnTZGkaVYY2UrUUUUjbIjqfuFe4nvWSU5nxnvy2 9KBjDU0xBIdaVrnRJUUUv014x267AKxVW8JVW5JwAFc2x0x2IEx4CE42xK8VAvwI8IcIk0 rVWrJVCq3wAFIxvE14AKwVWUJVWUGwA2ocxC64kIII0Yj41l84x0c7CEw4AK67xGY2AK02 1l84ACjcxK6xIIjxv20xvE14v26ryj6F1UM28EF7xvwVC0I7IYx2IY6xkF7I0E14v26F4j 6r4UJwA2z4x0Y4vEx4A2jsIE14v26F4j6r4UJwA2z4x0Y4vEx4A2jsIEc7CjxVAFwI0_Gr 1j6F4UJwAS0I0E0xvYzxvE52x082IY62kv0487Mc02F40EFcxC0VAKzVAqx4xG6I80ewAv 7VC0I7IYx2IY67AKxVWUAVWUtwAv7VC2z280aVAFwI0_Gr0_Cr1lOx8S6xCaFVCjc4AY6r 1j6r4UM4x0Y48IcxkI7VAKI48JM4x0x7Aq67IIx4CEVc8vx2IErcIFxwCY1x0262kKe7AK xVWUtVW8ZwCF04k20xvY0x0EwIxGrwCFx2IqxVCFs4IE7xkEbVWUJVW8JwC20s026c02F4 0E14v26r1j6r18MI8I3I0E7480Y4vE14v26r106r1rMI8E67AF67kF1VAFwI0_Jw0_GFyl IxkGc2Ij64vIr41lIxAIcVC0I7IYx2IY67AKxVWUCVW8JwCI42IY6xIIjxv20xvEc7CjxV AFwI0_Cr0_Gr1UMIIF0xvE42xK8VAvwI8IcIk0rVWUJVWUCwCI42IY6I8E87Iv67AKxVW8 JVWxJwCI42IY6I8E87Iv6xkF7I0E14v26r4UJVWxJrUvcSsGvfC2KfnxnUUI43ZEXa7VUb o5l5UUUUU== X-CM-SenderInfo: pyxotu46lvutnvoduhdfq/1tbiBwgMA2qqpVhOQQAAsy Content-Type: text/plain; charset="utf-8" pm_runtime_get_sync() increments the usage counter even on failure, so every successful call must be paired with a put. Both sensor read failures returned early and skipped the paired pm_runtime_put_autosuspend(), permanently preventing runtime suspend. Fixes: 0c3a333524a3 ("iio: pressure: mpl115: Implementing low power mode by= shutdown gpio") Cc: stable@vger.kernel.org Signed-off-by: Wentao Liang --- drivers/iio/pressure/mpl115.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) diff --git a/drivers/iio/pressure/mpl115.c b/drivers/iio/pressure/mpl115.c index 830a5065c008..3266b79bdab8 100644 --- a/drivers/iio/pressure/mpl115.c +++ b/drivers/iio/pressure/mpl115.c @@ -106,8 +106,10 @@ static int mpl115_read_raw(struct iio_dev *indio_dev, case IIO_CHAN_INFO_PROCESSED: pm_runtime_get_sync(data->dev); ret =3D mpl115_comp_pressure(data, val, val2); - if (ret < 0) + if (ret < 0) { + pm_runtime_put_autosuspend(data->dev); return ret; + } pm_runtime_put_autosuspend(data->dev); =20 return IIO_VAL_INT_PLUS_MICRO; @@ -115,8 +117,10 @@ static int mpl115_read_raw(struct iio_dev *indio_dev, pm_runtime_get_sync(data->dev); /* temperature -5.35 C / LSB, 472 LSB is 25 C */ ret =3D mpl115_read_temp(data); - if (ret < 0) + if (ret < 0) { + pm_runtime_put_autosuspend(data->dev); return ret; + } pm_runtime_put_autosuspend(data->dev); *val =3D ret >> 6; =20 --=20 2.34.1