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 1468C1D5AAD; Sun, 26 Jan 2025 14:56:22 +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=1737903382; cv=none; b=uk4kHcgphQcMZmKisr5RIq6h0illXSRn/YRv3dYj5frV6nqCdSYIAz8b+QWERB+gxKMgsvBJ8Rh6ZBub7G3rRv+9OTG05IqAUqzwgKy3lr2q0ZJ53qnszFN9MMFkXv+JsoOSetINoZ0izeEqBaBeWMf3O0uuNfO4qYaHIZkg5Zo= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1737903382; c=relaxed/simple; bh=x9qDZHqbuiQ7Ayq0nDGahD9H28T7XReiDJACRkz8x78=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=hSMaxvFq3DnUrByzZJvAEfgW0uHPL9UtU3BiI7CkeXFXB/dS6b9pxJTzEhFIDZnUapcrhZIIoNW58bkFjuyM3hGee0lE2jQ1pgGfap8kPIYTAj09KA5C7gpp6mHLGZt8oI8khBoZz18UwQZT3rm6NzyEHdsONWBSPyi44VG84XI= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=HMxaxU8a; 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="HMxaxU8a" Received: by smtp.kernel.org (Postfix) with ESMTPSA id AF634C4CEE4; Sun, 26 Jan 2025 14:56:19 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1737903382; bh=x9qDZHqbuiQ7Ayq0nDGahD9H28T7XReiDJACRkz8x78=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=HMxaxU8abC2wtBPPR/ff/Y9hGrEpCcSGFAq+NhZ+3ROOYT8SvwnwsINUHBgpUCYiK 8NJdqyddhhaDgpQBmrEwQEbSrVLuxAOx8RtdypK5PVWaPqh5ja25Ga1TsJIL4EPUyn +1bK1mbfoiT4p62CcJ55/Mkqc75J2ln5jHXIw+2lLSUzN5Uo8xe77ICRdi99baXgic b5ygoU2iQzEU6N6ukP5QdnvbxowtsuqRkb64fb7vRFkiL8SzsGkvTrH/2dW46NDqoy t7WZ7Yw8kCzPRkOVr/nmgm5HE4nE3/AvurglnZqvF6tEnMhSuEYpMO43zMl7+3zp+L dpGPylg44kH4w== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Dmitry Baryshkov , Maxime Ripard , Sasha Levin , andrzej.hajda@intel.com, neil.armstrong@linaro.org, rfoss@kernel.org, maarten.lankhorst@linux.intel.com, tzimmermann@suse.de, airlied@gmail.com, simona@ffwll.ch, dianders@chromium.org, laurent.pinchart@ideasonboard.com, jani.nikula@intel.com, nfraprado@collabora.com, u.kleine-koenig@baylibre.com, sui.jingfeng@linux.dev, xji@analogixsemi.com, yuanhsinte@chromium.org, robh@kernel.org, dri-devel@lists.freedesktop.org Subject: [PATCH AUTOSEL 6.6 04/17] drm/bridge: anx7625: use eld_mutex to protect access to connector->eld Date: Sun, 26 Jan 2025 09:55:59 -0500 Message-Id: <20250126145612.937679-4-sashal@kernel.org> X-Mailer: git-send-email 2.39.5 In-Reply-To: <20250126145612.937679-1-sashal@kernel.org> References: <20250126145612.937679-1-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 6.6.74 Content-Transfer-Encoding: 8bit From: Dmitry Baryshkov [ Upstream commit e72bf423a60afd744d13e40ab2194044a3af5217 ] 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-v2-2-c9bce1ee8bea@linaro.org Signed-off-by: Dmitry Baryshkov Signed-off-by: Sasha Levin --- drivers/gpu/drm/bridge/analogix/anx7625.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/gpu/drm/bridge/analogix/anx7625.c b/drivers/gpu/drm/bridge/analogix/anx7625.c index 412c6575e87b7..ddf944651c55a 100644 --- a/drivers/gpu/drm/bridge/analogix/anx7625.c +++ b/drivers/gpu/drm/bridge/analogix/anx7625.c @@ -2014,8 +2014,10 @@ static int anx7625_audio_get_eld(struct device *dev, void *data, memset(buf, 0, len); } else { dev_dbg(dev, "audio copy eld\n"); + mutex_lock(&ctx->connector->eld_mutex); memcpy(buf, ctx->connector->eld, min(sizeof(ctx->connector->eld), len)); + mutex_unlock(&ctx->connector->eld_mutex); } return 0; -- 2.39.5