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 047AF1FCFD9; Sun, 26 Jan 2025 14:56:24 +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=1737903384; cv=none; b=FELCam4GXzSMxtZKm/zMAz7DAWcIeyoZABU/aUvozc4Ul2+NhN1Z1VmSWisFZxEg3mjcyNcityfoYIgagBQvozCrOrLTULjcnspkK1dAgSbDQuvaIFlzsjfAALflGnePVEiwV+SutS417tyJJr4vfbTopHnMiRJ9nNBjqsnms1w= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1737903384; c=relaxed/simple; bh=8F4QJ1WVnzs5ANYh3Hp5Fu5kYNIAs2i1oIvPnzWUJLY=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=AYMVpTBD56pi0Ru44DA9hE5tDTpYHaNfNoQTq3kMPMmBgw8Ui6fVxKLD5Bao+KJ52q9BWcdR0Ouo0QgNnVWOjP5gG24Jj8Uveqtv7qy8NX4UL+H60CCuuNh/mKhKNzO4RvQh/Afb3yHhJG7GlXaT7itIxyRCk9AZs9FSBGApDBk= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=U/FM24as; 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="U/FM24as" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 64928C4CED3; Sun, 26 Jan 2025 14:56:22 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1737903383; bh=8F4QJ1WVnzs5ANYh3Hp5Fu5kYNIAs2i1oIvPnzWUJLY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=U/FM24asPCFsonWGIQIMqvDehy2YYl6EzOsYRYwbHsA/6fzBoNUu7wDQLQbuVom9j sdQ9kLkIAwzLM5hC6gorgitR/XB3F6X7tBVwqnttPx7Mf4GTva9Zzu+8t1UC1CalZ7 2OaL4QKAwuVWVtPiBdGz50cmE7uxCt1PB1JHdFfIPff6oMyJDOSVYC71+3iBZY1V6O uvJ6WhYoIZ4RYwJtyxSTbZ+3BEx68/c4616F6kCweM73XrkgYpu6S8X2mZD/CqVWwP dcIIwBBQR+8ZvRtAHLdE+ILFZX9Zr3cBrBLgbc1nTzRhWcLbH5J16UwIIbBsaoyI7U 5ZJVwoSZVqOXg== 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 6.6 05/17] drm/bridge: ite-it66121: use eld_mutex to protect access to connector->eld Date: Sun, 26 Jan 2025 09:56:00 -0500 Message-Id: <20250126145612.937679-5-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 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 8f5846b76d594..2381cd1cba879 100644 --- a/drivers/gpu/drm/bridge/ite-it66121.c +++ b/drivers/gpu/drm/bridge/ite-it66121.c @@ -1452,8 +1452,10 @@ 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