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 1CDEA1EEA30; Sun, 26 Jan 2025 14:54:14 +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=1737903254; cv=none; b=CKmBKIuyO4DdIr/QQWxmIfap5Ucz2Cng6PxzrC5vFW6rLjE567xKzIWMwBjcj+FVUWsAKJZBGhP7/DiuSmkOUPTUAqXCEm1yTjewdN4TVLiTsuLqKSVZCmWqYgqUfXekHsLHSXzWZLy3FyyPcLmLeOghwMRfynD8glmqZ+3m01U= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1737903254; c=relaxed/simple; bh=4mlVLYchybKNez3qJJsuH3/DFr4KppQ7p3VC8ZQJ0rs=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=oOIOQxfg+OjWwmL1STQPoyiAArS7e8h/3wtEb7h9X/gVagAgS9YFnnA8N7ZrwFRC+UJbdo/jkvYnWbTAPD0rNLzG8IepI6iqz0Br+DdC6GUadc2HiArxnGRyI80jYhHsg3BfAslGBVR24ux2ysRlfiR8LLkvnMLdiErZxOyl0Ks= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=A314vuzr; 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="A314vuzr" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 6B334C4CEE2; Sun, 26 Jan 2025 14:54:12 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1737903254; bh=4mlVLYchybKNez3qJJsuH3/DFr4KppQ7p3VC8ZQJ0rs=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=A314vuzrLi9kC8d2vZdNGc+1YPL9GpDsZdiYhplYiW58ifXMf+b7yIS2hq+vSSN1K Da0mNDkUlD8HYLd2iD0GxeW7PBu7hbs7Pz6IuXaUGZcjbvfA6kr5bIn3pnVnQ04Dbv AhuSZ9LOiutMwVO33q2P40zHX0xrU2BnIFOjeWo3/BMwcmQ2A0OWpsmcAGwfx9grjc NR8bWvaDGAr9kCkNXRbBO8OfvXaltvoWzzwIaHW87OhzWVdecIGNyoOkY+gHd4sEY9 25K39JqCU1N5ymWM8A2Xfpg4feYpoEBykqZB3C+y6+92Hobr1HUJM2vF7CdrEn9zr7 5fH6JRE0nWg2Q== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Dmitry Baryshkov , Maxime Ripard , Abhinav Kumar , Sasha Levin , robdclark@gmail.com, airlied@gmail.com, simona@ffwll.ch, swboyd@chromium.org, quic_bjorande@quicinc.com, quic_parellan@quicinc.com, linux-arm-msm@vger.kernel.org, dri-devel@lists.freedesktop.org, freedreno@lists.freedesktop.org Subject: [PATCH AUTOSEL 6.13 19/34] drm/msm/dp: use eld_mutex to protect access to connector->eld Date: Sun, 26 Jan 2025 09:52:55 -0500 Message-Id: <20250126145310.926311-19-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-arm-msm@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 9aad030dc64f6994dc5de7bb81ceca55dbc555c3 ] 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 Acked-by: Abhinav Kumar Reviewed-by: Abhinav Kumar Link: https://patchwork.freedesktop.org/patch/msgid/20241206-drm-connector-eld-mutex-v2-7-c9bce1ee8bea@linaro.org Signed-off-by: Dmitry Baryshkov Signed-off-by: Sasha Levin --- drivers/gpu/drm/msm/dp/dp_audio.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/gpu/drm/msm/dp/dp_audio.c b/drivers/gpu/drm/msm/dp/dp_audio.c index 74e01a5dd4195..0fd5e0abaf078 100644 --- a/drivers/gpu/drm/msm/dp/dp_audio.c +++ b/drivers/gpu/drm/msm/dp/dp_audio.c @@ -414,8 +414,10 @@ static int msm_dp_audio_get_eld(struct device *dev, return -ENODEV; } + mutex_lock(&msm_dp_display->connector->eld_mutex); memcpy(buf, msm_dp_display->connector->eld, min(sizeof(msm_dp_display->connector->eld), len)); + mutex_unlock(&msm_dp_display->connector->eld_mutex); return 0; } -- 2.39.5