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 914611FF7BB; Sun, 26 Jan 2025 14:56:57 +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=1737903417; cv=none; b=lBEVWz0OCEH2S4Ut851IntaPqqfm0Tkct7yIDJ3rgmUKB2sSsgEVcoWkYmL3YW4A29RFKj2FXI8bmyuEtPk4msWIZoCrCHrH1Oa/X9iSvvWLQVhRFOM/PdXoy2cqG/RCqqa9i2Jkt6NuXP3OQxnhE+D79UJzeYV7ly0g7On9FfQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1737903417; c=relaxed/simple; bh=1bo2GecgpSTPHTxmCsIzWDUvlu0mvNWQk1qBwHKKAvU=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=MhT0yjfIqervE0wPg9YsSsIcMSpPWNj4+A+zLboiQkwfwso07OIIY0BitlRxP0uNUcMREvfyxW1fVOx7RNPKQoi4j4ixHVMiwv+uzp+iY7gbjN7qZXPm8r9O4hMj3ySTsI1f9ycc4ej6ngdmgLMEFBZfN0nJRzOK0eWqHAxZkRk= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=uOvfOLK6; 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="uOvfOLK6" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 29BCCC4CEE5; Sun, 26 Jan 2025 14:56:56 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1737903417; bh=1bo2GecgpSTPHTxmCsIzWDUvlu0mvNWQk1qBwHKKAvU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=uOvfOLK6+M99qFj+DrBrvFZepOlftHnWV1F8OEpynGLgpX3OvTVWXPJrhuk0jpBZL P3noSo8A8aHYL34W+Cc2IzYxBr/23svneI9KJZxSFPmsqAvEyneLUIbG+skv5md61b TEre1B0M7socFMiuHaHHyPTF/78lR/rCGz6Z+ffcWRwSXGKp1SJQRR+Wzglbb8DyLl LkhYh7d9ozB18ERJj1Sb4M4SOza+dm0cU4pt1PJGyLR0/b16bLA9fc9WSWw6JMHCa9 0q3sahmwIbSCudFOTxmS0dNqJdyb0aewKcvviKIwkTFimBhYcbCw5xfUJkq22zzRLk +5rVImOVNogQA== 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 6.1 3/9] drm/sti: hdmi: use eld_mutex to protect access to connector->eld Date: Sun, 26 Jan 2025 09:56:45 -0500 Message-Id: <20250126145651.943149-3-sashal@kernel.org> X-Mailer: git-send-email 2.39.5 In-Reply-To: <20250126145651.943149-1-sashal@kernel.org> References: <20250126145651.943149-1-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 6.1.127 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 8539fe1fedc4c..fdb28e05720ad 100644 --- a/drivers/gpu/drm/sti/sti_hdmi.c +++ b/drivers/gpu/drm/sti/sti_hdmi.c @@ -1220,7 +1220,9 @@ 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