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 8ECD91F153F; Sun, 26 Jan 2025 14:54:17 +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=1737903257; cv=none; b=l12pCU6X2RzY+iT8W6lZQuyGyjz3cZuyft5owJeNjRe0LOrdMiE2VfYg9QOrqa47kgNaR4xclRKcoN3ADLc5drchdpA8NB4WLKZXPmwmvgBdzIs4ssJ76ItxxHehZvTRfnrq1izMZ0nyyUhMMu0+FkLM6E+4Fbhb7X45dTcBDhA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1737903257; c=relaxed/simple; bh=g913gO6xT4GXclS18ziqOPs81ttbwmSm1HwBTY5c6gI=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=C9Fu5SibnoYOA0KnVFr0eVynJklfyR3tlZ9iMlyRr59YbjuiRdb/7q7yoEFHqURjSHwWOc1nQBXwLvLQiLNnsC2JjLoufTFjQdEt8d0X/9AQIPd9PqgrXT6TFpp1OzSRZ2O1/KD5iiG24cT19NNKbEwIIEnb9qPIT87ZtM9+qcY= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=QTi2ERuv; 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="QTi2ERuv" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 2D6E8C4CED3; Sun, 26 Jan 2025 14:54:16 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1737903257; bh=g913gO6xT4GXclS18ziqOPs81ttbwmSm1HwBTY5c6gI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=QTi2ERuv3bZEvvhm+Vuyk6ypI0vYmSsYlNeG10Ex1KleResfOsMw/Qb00vuzfcK7p VRafLFhgMTrEqPWnQKbEB2eghPAkTXf5GmYmq9JaLjFgHx29RUt6LiYgDEiJnRUHkK 8dcYAO8NgRYK5rn+EhaEtBah/gXkB765wzAqWq1VZjXcXuhTaDC89ulVN8pIqrrl8E ybFVwzTkfkwE4MjacTkXReVKkuhMQD68a7XuOH2zoJygBoAs+J2kDrCXzclz+Ibf6L /AAo7llQJVbR9wkiyiFNLuopnfQn7Wrhy5YhH3cUHcK2Isfy4qe9jzRCg4TaBNwcwP HEdS6NLL7zdUw== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Dmitry Baryshkov , Maxime Ripard , Raphael Gallais-Pou , Sasha Levin , alain.volmat@foss.st.com, maarten.lankhorst@linux.intel.com, tzimmermann@suse.de, airlied@gmail.com, simona@ffwll.ch, dri-devel@lists.freedesktop.org Subject: [PATCH AUTOSEL 6.13 21/34] drm/sti: hdmi: use eld_mutex to protect access to connector->eld Date: Sun, 26 Jan 2025 09:52:57 -0500 Message-Id: <20250126145310.926311-21-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 e99c0b517bcd53cf61f998a3c4291333401cb391 ] 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: Raphael Gallais-Pou Link: https://patchwork.freedesktop.org/patch/msgid/20241206-drm-connector-eld-mutex-v2-9-c9bce1ee8bea@linaro.org Signed-off-by: Dmitry Baryshkov Signed-off-by: Sasha Levin --- drivers/gpu/drm/sti/sti_hdmi.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/gpu/drm/sti/sti_hdmi.c b/drivers/gpu/drm/sti/sti_hdmi.c index 21b46a6465f08..f8bbae6393ef8 100644 --- a/drivers/gpu/drm/sti/sti_hdmi.c +++ b/drivers/gpu/drm/sti/sti_hdmi.c @@ -1225,7 +1225,9 @@ static int hdmi_audio_get_eld(struct device *dev, void *data, uint8_t *buf, size struct drm_connector *connector = hdmi->drm_connector; DRM_DEBUG_DRIVER("\n"); + mutex_lock(&connector->eld_mutex); memcpy(buf, connector->eld, min(sizeof(connector->eld), len)); + mutex_unlock(&connector->eld_mutex); return 0; } -- 2.39.5