From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 D85011A76DE; Sun, 26 Jan 2025 14:54:04 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1737903244; cv=none; b=iX+KfTL9l2BFM7QKWw9X7y7P4mWaKkY+4Re2e3epvKv67+etDcsYYlAt0c18NmUPl3W5izHj26PuMNEzd/a529fDy6VWDQPPOeB8V1ONyZCPJkR631VafVDOV4u7dHkPbO1lbqJIa1oYG0wtkNrHMUoJjvXrPsxxo44MIkEUKvk= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1737903244; c=relaxed/simple; bh=sXPl/L98og/V3vDZJrbZHCZOChEie7JwWBgO4at0US8=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=lJ0zVShXc0WnEQp2TRRu0Lwv0T/uoJK0ThaznzcUDLlK55IW7PBYY8Xn2S2VlQPHBbbHbDWE2TO+cquQj5o8V2eYiMPa7xWnRTqs1ZdYeB63Xa2wztrW/KVJiJCuc60Fl/4q3DIdaNv/jF8UKj6jS8Gnc9PBaiPPYgkojSWeQ1A= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=PiLechLQ; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="PiLechLQ" Received: by smtp.kernel.org (Postfix) with ESMTPSA id C6D6BC4CED3; Sun, 26 Jan 2025 14:54:02 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1737903244; bh=sXPl/L98og/V3vDZJrbZHCZOChEie7JwWBgO4at0US8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=PiLechLQ5UEltdkrt/vD6n49dneo+ntvHFtVotYCrjJZlOt9aKSl8f+F3hmrLonE6 cYxPOFt0l1rj7uJ4xsHmEb524ea/6NVhwX1+1u3DeRXljSbfcWq68IU/+ScrQdhO9o PRToVVxJXr++S1QBLBgLBvoQZCfhsSz9qe5Ah/8foG8IYnTtss8C9fMsh2aUvjPM/u 0t84VKgfRqMy+LKY9rAKwF/KTNvnd7uMlla+fIfbh7toxkH2jDigBTrQoFIR5TekNQ U2Ps95iYrSdiosbnXjArDbzaifnEGYKijQ0qIssawXspdO7lHQs72GEGHKu+xMWS0d ufZJ0mqZXgt0Q== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Dmitry Baryshkov , Maxime Ripard , Sasha Levin , ple@baylibre.com, neil.armstrong@linaro.org, andrzej.hajda@intel.com, rfoss@kernel.org, maarten.lankhorst@linux.intel.com, tzimmermann@suse.de, airlied@gmail.com, simona@ffwll.ch, dri-devel@lists.freedesktop.org Subject: [PATCH AUTOSEL 6.13 16/34] drm/bridge: ite-it66121: use eld_mutex to protect access to connector->eld Date: Sun, 26 Jan 2025 09:52:52 -0500 Message-Id: <20250126145310.926311-16-sashal@kernel.org> X-Mailer: git-send-email 2.39.5 In-Reply-To: <20250126145310.926311-1-sashal@kernel.org> References: <20250126145310.926311-1-sashal@kernel.org> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore X-stable-base: Linux 6.13 Content-Transfer-Encoding: 8bit From: Dmitry Baryshkov [ Upstream commit 39ead6e02ea7d19b421e9d42299d4293fed3064e ] Reading access to connector->eld can happen at the same time the drm_edid_to_eld() updates the data. Take the newly added eld_mutex in order to protect connector->eld from concurrent access. Reviewed-by: Maxime Ripard Link: https://patchwork.freedesktop.org/patch/msgid/20241206-drm-connector-eld-mutex-v2-3-c9bce1ee8bea@linaro.org Signed-off-by: Dmitry Baryshkov Signed-off-by: Sasha Levin --- drivers/gpu/drm/bridge/ite-it66121.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/gpu/drm/bridge/ite-it66121.c b/drivers/gpu/drm/bridge/ite-it66121.c index 35ae3f0e8f51f..940083e5d2ddb 100644 --- a/drivers/gpu/drm/bridge/ite-it66121.c +++ b/drivers/gpu/drm/bridge/ite-it66121.c @@ -1450,8 +1450,10 @@ static int it66121_audio_get_eld(struct device *dev, void *data, dev_dbg(dev, "No connector present, passing empty EDID data"); memset(buf, 0, len); } else { + mutex_lock(&ctx->connector->eld_mutex); memcpy(buf, ctx->connector->eld, min(sizeof(ctx->connector->eld), len)); + mutex_unlock(&ctx->connector->eld_mutex); } mutex_unlock(&ctx->lock); -- 2.39.5