From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from m16.mail.163.com (m16.mail.163.com [117.135.210.3]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 66FDE4854F4; Fri, 25 Sep 2026 14:10:24 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=117.135.210.3 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790345429; cv=none; b=VuyuAZHB93sLy/zsfDZHF3rF2owd2B54GhpK5dasdOpO+9Ot6zBCB0fwhSv20nI8MzMHTj9Rixafpk6nwSlinYiCy0yXFlGTD99DJ6I1+8+AEPDxlGTDJwbGqo1dNUhMgpUwjjvJ1pz0OzCKiGNi15JU55duXnDs2uvBrqpVzIs= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790345429; c=relaxed/simple; bh=IAek5QNNG48VEIRnYPgZiQ9h5BIXUIkQlgLx1MXYb9c=; h=From:To:Cc:Subject:Date:Message-Id:MIME-Version; b=FGYmnu5MxZr2/wksPQx2b9SADhKJwk3mZtbgE4l25q2xjayI2S1dvHjir00rl+Y3K3U49V5h9t9BLBk77+S2rbjUfNM4R7Ns+HiZFJuwYbRLwmRnlIKzADI83tXj6fR1A5O1pYgwybfk3jU0G5leh3O8+e/EM+gHwLjSeV04ffQ= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=163.com; spf=pass smtp.mailfrom=163.com; dkim=pass (1024-bit key) header.d=163.com header.i=@163.com header.b=a3Wzkj7N; arc=none smtp.client-ip=117.135.210.3 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=163.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=163.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=163.com header.i=@163.com header.b="a3Wzkj7N" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=163.com; s=s110527; h=From:To:Subject:Date:Message-Id:MIME-Version; bh=KX uDrmnU1MCQSKZ5fs/tsSrPstiX4bm0nvq6uTSPhu0=; b=a3Wzkj7NC7vd2oOmhE 9wd9GseZqlm+SpTBi2jZ97Qk8qwE3igJj62uSRX99fEi2t7kil3qTq4S76D8Mk1c PrRdDMQgFPCTCdmLNi6d7Qly1t+QM+SzbG4H4bF5GxusLsr299IEuAUeKgNLDtbp xZo1EYUJ5RtMXO9VhegPQ4Af4= Received: from pc.localdomain (unknown []) by gzsmtp2 (Coremail) with SMTP id PSgvCgBHeMKqgLZq8bfxBA--.29463S2; Fri, 25 Sep 2026 22:09:48 +0800 (CST) From: Jiale Yao To: Jonathan Cameron , David Lechner , =?UTF-8?q?Nuno=20S=C3=A1?= , Andy Shevchenko , =?UTF-8?q?Uwe=20Kleine-K=C3=B6nig=20=28The=20Capable=20Hub=29?= , Bjorn Helgaas , Matti Vaittinen , Danilo Krummrich , linux-iio@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Jiale Yao Subject: [PATCH] iio: accel: kxcjk-1013: reject duplicate event disable Date: Fri, 25 Sep 2026 22:09:43 +0800 Message-Id: <20260925140945.2254656-1-yaojiale02@163.com> 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: 8bit X-CM-TRANSID:PSgvCgBHeMKqgLZq8bfxBA--.29463S2 X-Coremail-Antispam: 1Uf129KBjvdXoW7JF1DKF4ftry7uF13GF15urg_yoWkCrg_uw 18Zr9rWF9xCr48Ww45urs3Xry8Ka4kXFn09Fs2yr4akrW7Jas3Kw4kArZ8AwsrWw47t3Wk JF48Xw1fXF13GjkaLaAFLSUrUUUUjb8apTn2vfkv8UJUUUU8Yxn0WfASr-VFAUDa7-sFnT 9fnUUvcSsGvfC2KfnxnUUI43ZEXa7sRM7KsUUUUUU== X-CM-SenderInfo: x1dryxhdohiji6rwjhhfrp/xtbC8AyTzWq2gKxYwQAA3L The IIO core does not filter duplicate writes to the event enable attribute. kxcjk1013_write_event_config() already ignores repeated enable requests, but a repeated disable request still calls kxcjk1013_set_power_state(data, false), dropping a runtime PM reference that was not acquired for this request. This can underflow the runtime PM usage count and trigger a "Runtime PM usage count underflow" warning. Return early when the requested state already matches ev_enable_state. Signed-off-by: Jiale Yao --- drivers/iio/accel/kxcjk-1013.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/iio/accel/kxcjk-1013.c b/drivers/iio/accel/kxcjk-1013.c index 166fb786425f..8994c9e8e048 100644 --- a/drivers/iio/accel/kxcjk-1013.c +++ b/drivers/iio/accel/kxcjk-1013.c @@ -1030,7 +1030,7 @@ static int kxcjk1013_write_event_config(struct iio_dev *indio_dev, struct kxcjk1013_data *data = iio_priv(indio_dev); int ret; - if (state && data->ev_enable_state) + if (state == data->ev_enable_state) return 0; mutex_lock(&data->mutex); -- 2.34.1