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 D80431A7046; Sun, 26 Jan 2025 14:54:02 +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=1737903242; cv=none; b=u4Z5PdryL8rWjfrTS3dzTTlYdvBu1a0K5lKX28fR1nGzNuKZUCKSq3PagjRgCYUCH+WD4aS2Y4r5HDstNA/kVgaJBnN3L+IynCBcAqnoGaGqNIo2b2MfiT8AVRqHZGOTXfgXfsB9fyNn3c0QYWOgjAFLsQ+gg7FKyMhfvQXDQvo= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1737903242; c=relaxed/simple; bh=n+zT/91wQRIjD4biaVx54GDDMTbZ0O75vA1N+LQ7aqg=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=JlLG4/UactVR53OvRbHLw8U4nduH+rsux0iOQ0c4dzvQwfgojzppydoedrsG0IYSxf2lEfGNE+aIOD3AdcDvfjZ/4RX7WM8lAmM2rGdI2IHwuOsLWQPENWZ8nJJI3F12qfOgi6y1TBQDpWgceADBbCyAcfqXRQWEX+07fi+Gyd0= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=coe40f6B; 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="coe40f6B" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 0B60BC4CEE4; Sun, 26 Jan 2025 14:53:59 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1737903242; bh=n+zT/91wQRIjD4biaVx54GDDMTbZ0O75vA1N+LQ7aqg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=coe40f6BTuhhGwWec/RcCHJnEDfBUhol1o9nWtPqJcLdCW1295ngrE2AVADXJLoCf duV6K/7YXBMwJ/nVALr15HNUxysXPeUAz0wQA95r3lxLEUtGTwGx5DgjP6I9DrZzud 8KXnEVbN1GppEcsrEGPO0VvB2Nnyy6UXWZjV630l4+ODkwscpJP2mXUd+lIBd9vStF xjF60JN7BEVydiqpJAjZqT+qP3RqepA9jlI3ZsTYx1caRgFYBv0nN99CxIdGPmDR6b KTxryb3SOorfsSHG/OJd7BDkEgj7sd5w8NUgFttI/MfX7t9eSGrFIxjtlJOBlkqtaf hw7v0e3gkN4Ww== 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, sui.jingfeng@linux.dev, treapking@chromium.org, u.kleine-koenig@baylibre.com, xji@analogixsemi.com, yuanhsinte@chromium.org, robh@kernel.org, dri-devel@lists.freedesktop.org Subject: [PATCH AUTOSEL 6.13 15/34] drm/bridge: anx7625: use eld_mutex to protect access to connector->eld Date: Sun, 26 Jan 2025 09:52:51 -0500 Message-Id: <20250126145310.926311-15-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 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 a2675b121fe44..c036bbc92ba96 100644 --- a/drivers/gpu/drm/bridge/analogix/anx7625.c +++ b/drivers/gpu/drm/bridge/analogix/anx7625.c @@ -2002,8 +2002,10 @@ 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