From nobody Fri Sep 25 04:08:51 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 323A83D47A3; Wed, 16 Sep 2026 18:22:43 +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=1789582976; cv=none; b=b4kZv+pzMDMAH2jQyY0r3gf93FYhEE5KWSGJ3HxneIf2rv6w0igpZrLSwrQcAJCqt5vbW97/YVhHNAZctzBMZpU3XrEwAfwrqkHcM96spcwTvoxU9lQTympvxfsReYslwBvbeHzsgYUDV9DlhaGiuS1I/ChRchdbdFTW82GwRW0= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789582976; c=relaxed/simple; bh=mQ0YExcIJuI7ufxK/DWMkUw2Z2lUzNPyt9cMabdlIcM=; h=From:To:Cc:Subject:Date:Message-Id:MIME-Version; b=PyOanL9+tZcPgBBXh0A6EvTYDLl6pHNC5kl4+JEMoJ67l9beIhhiAIkjrqaQpQndBDMS1btWh232noauovmxqbA/bUGtiDnP5ZfvRv64CtH9OqtL6VSCeC1wijwdXj/YcyHSMk1PoB44f2BmM/7DF2nHX5vocG0IqMLxLNfWW+Y= 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 zQCowABHsTtj3qpqAG1vCA--.23703S2; Thu, 17 Sep 2026 02:22:27 +0800 (CST) From: Wentao Liang To: airlied@gmail.com Cc: alexandre.torgue@foss.st.com, benjamin.gaignard@linaro.org, dri-devel@lists.freedesktop.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-stm32@st-md-mailman.stormreply.com, maarten.lankhorst@linux.intel.com, mcoquelin.stm32@gmail.com, mripard@kernel.org, philippe.cornu@foss.st.com, raphael.gallais-pou@foss.st.com, simona@ffwll.ch, tzimmermann@suse.de, yannick.fertre@foss.st.com, yannick.fertre@st.com, Wentao Liang , stable@vger.kernel.org Subject: [PATCH] drm/stm: Fix runtime PM leak in ltdc_crtc_mode_set_nofb() Date: Wed, 16 Sep 2026 18:21:59 +0000 Message-Id: <20260916182159.2091530-1-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: zQCowABHsTtj3qpqAG1vCA--.23703S2 X-Coremail-Antispam: 1UD129KBjvdXoWruF1xXFyUCF45WF13Gr1kAFb_yoWfArc_GF 45ZF97XrWqk3WDZw17Aw43ZryFva4UZrn7Xw10y343trZrXF1UZ348Xr90vr47Xa17XF9x Ja1vgFyrJrZ7ujkaLaAFLSUrUUUUjb8apTn2vfkv8UJUUUU8Yxn0WfASr-VFAUDa7-sFnT 9fnUUIcSsGvfJTRUUUb-xFF20E14v26ryj6rWUM7CY07I20VC2zVCF04k26cxKx2IYs7xG 6rWj6s0DM7CIcVAFz4kK6r1j6r18M28lY4IEw2IIxxk0rwA2F7IY1VAKz4vEj48ve4kI8w A2z4x0Y4vE2Ix0cI8IcVAFwI0_Gr0_Xr1l84ACjcxK6xIIjxv20xvEc7CjxVAFwI0_Gr1j 6F4UJwA2z4x0Y4vEx4A2jsIE14v26r4UJVWxJr1l84ACjcxK6I8E87Iv6xkF7I0E14v26F 4UJVW0owAS0I0E0xvYzxvE52x082IY62kv0487Mc02F40EFcxC0VAKzVAqx4xG6I80ewAv 7VC0I7IYx2IY67AKxVWUAVWUtwAv7VC2z280aVAFwI0_Cr0_Gr1UMcvjeVCFs4IE7xkEbV WUJVW8JwACjcxG0xvY0x0EwIxGrwACjI8F5VA0II8E6IAqYI8I648v4I1lFIxGxcIEc7Cj xVA2Y2ka0xkIwI1lc7CjxVAaw2AFwI0_GFv_Wryl42xK82IYc2Ij64vIr41l4I8I3I0E4I kC6x0Yz7v_Jr0_Gr1lx2IqxVAqx4xG67AKxVWUJVWUGwC20s026x8GjcxK67AKxVWUGVWU WwC2zVAF1VAY17CE14v26r4a6rW5MIIYrxkI7VAKI48JMIIF0xvE2Ix0cI8IcVAFwI0_JF I_Gr1lIxAIcVC0I7IYx2IY6xkF7I0E14v26r4UJVWxJr1lIxAIcVCF04k26cxKx2IYs7xG 6r1j6r1xMIIF0xvEx4A2jsIE14v26F4j6r4UJwCI42IY6I8E87Iv6xkF7I0E14v26F4UJV W0obIYCTnIWIevJa73UjIFyTuYvjfUU-eoUUUUU X-CM-SenderInfo: pyxotu46lvutnvoduhdfq/1tbiBgAMA2qqok+DJQAAsC Content-Type: text/plain; charset="utf-8" pm_runtime_get_sync() increments the usage counter even when it fails, so the early return on a failed resume leaves the counter elevated forever. Drop it again with pm_runtime_put_noidle() on that path. Fixes: 35ab6cfbf211 ("drm/stm: support runtime power management") Cc: stable@vger.kernel.org Signed-off-by: Wentao Liang --- drivers/gpu/drm/stm/ltdc.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/gpu/drm/stm/ltdc.c b/drivers/gpu/drm/stm/ltdc.c index f7e847cfa38f..a95ca3c3df76 100644 --- a/drivers/gpu/drm/stm/ltdc.c +++ b/drivers/gpu/drm/stm/ltdc.c @@ -945,6 +945,7 @@ static void ltdc_crtc_mode_set_nofb(struct drm_crtc *cr= tc) ret =3D pm_runtime_get_sync(ddev->dev); if (ret) { drm_err(crtc->dev, "Failed to set mode, cannot get sync\n"); + pm_runtime_put_noidle(ddev->dev); return; } } --=20 2.34.1