From nobody Fri Sep 25 04:41:50 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 0FCEB4B0E54; Wed, 16 Sep 2026 17:21:29 +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=1789579292; cv=none; b=TixSji+7sXTY1auRmiG9kM9gpqNZw/xqrUimDU2Fn1Xt5Lpc3eSQcL/iOEJQPikTle7b6QxQrT8b+XWSmeDMi7dB2X2xq/0Poq9cz0HIbVYIlrA0sE6BXjNe0QbSdkqP9wWbXbxEOBRZ/VczH77I7miAJRFWTwDEsKPjvNj6xEw= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789579292; c=relaxed/simple; bh=8lNUhLYneBnu7K/P0ITtAAhPfijQpEtXyXK4yyuVYhQ=; h=From:To:Cc:Subject:Date:Message-Id:MIME-Version; b=ZD1rxJKcvW3teYz9qpG+YVCqMQ7uGluhhMz69Dc4uJ8rhyhkDCNzcV471PakKb56lrfeEjnLWxOUC3XIsiI4cCWv4vtJBVqgXnQZ7kG4BdLnI+2jycjEAat3egZOlstQ8OOiPzI4UCOb1h+CJPOiCo2Jpm27x8s6Hv4ehKbkox4= 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 zQCowADH+EIR0KpqZoNuCA--.22990S2; Thu, 17 Sep 2026 01:21:21 +0800 (CST) From: Wentao Liang To: airlied@gmail.com Cc: dri-devel@lists.freedesktop.org, hansg@kernel.org, intel-gfx@lists.freedesktop.org, intel-xe@lists.freedesktop.org, jani.nikula@linux.intel.com, joonas.lahtinen@linux.intel.com, linux-kernel@vger.kernel.org, matthew.d.roper@intel.com, rodrigo.vivi@intel.com, simona@ffwll.ch, tursulin@ursulin.net, vivek.kasireddy@intel.com, Wentao Liang , stable@vger.kernel.org Subject: [PATCH] drm/i915/dsi: Fix i2c adapter reference leak in i2c_adapter_lookup() Date: Wed, 16 Sep 2026 17:20:53 +0000 Message-Id: <20260916172053.2087412-1-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: zQCowADH+EIR0KpqZoNuCA--.22990S2 X-Coremail-Antispam: 1UD129KBjvdXoWrZFW5AF1ruFW8Xry7ZFWxtFb_yoWkJrc_K3 WrZr12gr98Zan09F1UAw1furyS9FsFqw48u3WxtFWSyw1Syr4UX39rWrn8Xws0v3WYkw1D J3Wjgr1kZrsrWjkaLaAFLSUrUUUUjb8apTn2vfkv8UJUUUU8Yxn0WfASr-VFAUDa7-sFnT 9fnUUIcSsGvfJTRUUUb-8FF20E14v26r4j6ryUM7CY07I20VC2zVCF04k26cxKx2IYs7xG 6rWj6s0DM7CIcVAFz4kK6r1j6r18M28lY4IEw2IIxxk0rwA2F7IY1VAKz4vEj48ve4kI8w A2z4x0Y4vE2Ix0cI8IcVAFwI0_Xr0_Ar1l84ACjcxK6xIIjxv20xvEc7CjxVAFwI0_Gr1j 6F4UJwA2z4x0Y4vEx4A2jsIE14v26r4UJVWxJr1l84ACjcxK6I8E87Iv6xkF7I0E14v26r 4UJVWxJr1le2I262IYc4CY6c8Ij28IcVAaY2xG8wAqx4xG64xvF2IEw4CE5I8CrVC2j2Wl Yx0E2Ix0cI8IcVAFwI0_Jw0_WrylYx0Ex4A2jsIE14v26r4j6F4UMcvjeVCFs4IE7xkEbV WUJVW8JwACjcxG0xvY0x0EwIxGrwACjI8F5VA0II8E6IAqYI8I648v4I1lFIxGxcIEc7Cj xVA2Y2ka0xkIwI1lc7CjxVAaw2AFwI0_Jw0_GFyl42xK82IYc2Ij64vIr41l4I8I3I0E4I kC6x0Yz7v_Jr0_Gr1lx2IqxVAqx4xG67AKxVWUJVWUGwC20s026x8GjcxK67AKxVWUGVWU WwC2zVAF1VAY17CE14v26r1q6r43MIIYrxkI7VAKI48JMIIF0xvE2Ix0cI8IcVAFwI0_JF I_Gr1lIxAIcVC0I7IYx2IY6xkF7I0E14v26F4j6r4UJwCI42IY6xAIw20EY4v20xvaj40_ Jr0_JF4lIxAIcVC2z280aVAFwI0_Gr0_Cr1lIxAIcVC2z280aVCY1x0267AKxVW8Jr0_Cr 1UYxBIdaVFxhVjvjDU0xZFpf9x0JUDOz3UUUUU= X-CM-SenderInfo: pyxotu46lvutnvoduhdfq/1tbiBgUMA2qqok9p+gABsz Content-Type: text/plain; charset="utf-8" i2c_acpi_find_adapter_by_handle() returns the i2c adapter with its device reference incremented. The lookup callback only reads the bus number and never drops the reference. Put it back once done. Fixes: 8cbf89db2941 ("drm/i915/dsi: Parse the I2C element from the VBT MIPI= sequence block (v3)") Cc: stable@vger.kernel.org Signed-off-by: Wentao Liang --- drivers/gpu/drm/i915/display/intel_dsi_vbt.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/i915/display/intel_dsi_vbt.c b/drivers/gpu/drm= /i915/display/intel_dsi_vbt.c index fe12041e913c..2097c5d17cb7 100644 --- a/drivers/gpu/drm/i915/display/intel_dsi_vbt.c +++ b/drivers/gpu/drm/i915/display/intel_dsi_vbt.c @@ -460,8 +460,10 @@ static int i2c_adapter_lookup(struct acpi_resource *ar= es, void *data) return 1; =20 adapter =3D i2c_acpi_find_adapter_by_handle(adapter_handle); - if (adapter) + if (adapter) { intel_dsi->i2c_bus_num =3D adapter->nr; + put_device(&adapter->dev); + } =20 return 1; } --=20 2.34.1