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 D4EDB1AAE1E; Sun, 26 Jan 2025 14:55:37 +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=1737903337; cv=none; b=VJILdJo5IZO2TZEPArwE1UN083VKxJb7tG8tTyt4zz6x6HGhcGPTpUFAR8eo3YLanAXw2RRd6ywt8M3hM7T5q98LWcBgCv4S7aMYXseiTY7rJZaBrTNsaix6qSR4Y7iNr3QE7HHcFmrcrfpDFkg8rL9bL71hzYVCcCZ2som27ho= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1737903337; c=relaxed/simple; bh=fyiEmA/jTVf27Oj64YW7GKYpRdBIwjXLXoZQuJA4XOk=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=bUjvFouUi4uln0r/RoR+uy02bw6ORmSq0xKqIeci+D6fcDO1mTc/TGFbrFtsuMMKjZFP9jFC5KR6vNI29YEVuwfHnbLOfm4SvIb6qunsPfGJLMDxYKIZU9efyWjeZQYZCqMwXEKWw30dIe2IpLnIzEKkrS0gNabzGLWWjyscM+w= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=d65Xl5BC; 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="d65Xl5BC" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 3EC02C4CED3; Sun, 26 Jan 2025 14:55:36 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1737903337; bh=fyiEmA/jTVf27Oj64YW7GKYpRdBIwjXLXoZQuJA4XOk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=d65Xl5BClaoN0OfHrCvp0yR+SaHMxXr5BzwgKLnilD2eXZNWOgaj5/xsfEnSquWIj uVFiLXochCNC/NgUKreUJPm4wIHXJgg71iX2aBRjATKaP6dJgtjsOJzAf57udt0xs5 Pfe8OB5xqpw8wWR2+ResKVZCGs1qpkawLhuxUGOkHOxiC3b104al2zVu443sRkWMy4 x8LEqgBXKEL3EvcE2+ezEG0Kyi+8li3ogyPaqcPVBZLehiFx9EaxxKJhrAOrutT/rd YTxcLSSadsEVLS/WAnS+IOcyg7miArrt5JCblNM93XmB66a1hR+Xf6NrxMbIAx/rPQ 7oQijtw8TiKdg== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Dmitry Baryshkov , Maxime Ripard , Sasha Levin , inki.dae@samsung.com, sw0312.kim@samsung.com, kyungmin.park@samsung.com, airlied@gmail.com, simona@ffwll.ch, krzk@kernel.org, dri-devel@lists.freedesktop.org, linux-arm-kernel@lists.infradead.org, linux-samsung-soc@vger.kernel.org Subject: [PATCH AUTOSEL 6.12 16/31] drm/exynos: hdmi: use eld_mutex to protect access to connector->eld Date: Sun, 26 Jan 2025 09:54:32 -0500 Message-Id: <20250126145448.930220-16-sashal@kernel.org> X-Mailer: git-send-email 2.39.5 In-Reply-To: <20250126145448.930220-1-sashal@kernel.org> References: <20250126145448.930220-1-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 6.12.11 Content-Transfer-Encoding: 8bit From: Dmitry Baryshkov [ Upstream commit 5e8436d334ed7f6785416447c50b42077c6503e0 ] 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-v2-5-c9bce1ee8bea@linaro.org Signed-off-by: Dmitry Baryshkov Signed-off-by: Sasha Levin --- drivers/gpu/drm/exynos/exynos_hdmi.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/gpu/drm/exynos/exynos_hdmi.c b/drivers/gpu/drm/exynos/exynos_hdmi.c index 1e26cd4f83479..52059cfff4f0b 100644 --- a/drivers/gpu/drm/exynos/exynos_hdmi.c +++ b/drivers/gpu/drm/exynos/exynos_hdmi.c @@ -1643,7 +1643,9 @@ static int hdmi_audio_get_eld(struct device *dev, void *data, uint8_t *buf, struct hdmi_context *hdata = dev_get_drvdata(dev); struct drm_connector *connector = &hdata->connector; + mutex_lock(&connector->eld_mutex); memcpy(buf, connector->eld, min(sizeof(connector->eld), len)); + mutex_unlock(&connector->eld_mutex); return 0; } -- 2.39.5