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 E59D1221571; Thu, 13 Feb 2025 14:32:28 +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=1739457149; cv=none; b=oGT8tmJYPeeTSMW9JGBfZ1wH+oDGVr1gsiYTKiWFCd3klPZsTzmqYCo3qeNmpoAupdU+VYgSNDWPZx22x/EXk5TYTCfwHXUcNLjMLxfUBN6JLrWrK5hMJUvjG0G+PMykSzuIcG4AJk1gXUZSmlFQhtLyFrSKm952Y3SK3tyNlBg= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1739457149; c=relaxed/simple; bh=IrHxXXz5SmKsl3tcE3Vi7aZHmRn43RUp0sJQ7KwLOHA=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=gqLuGe8EKnfp2rBvPMx9Yg7UoTTGmPlkrhwEiBg1TCI0OngotS9gWqfSv6aYdJbi11C+hMr61BPwhZKX7VHlGbCfPEAez+tM/zTDyKA2NjmHrFU/CXM2qmUd+nFUWHmmXNw7oMMqFdHTrKPoDnW7TFwa/BIPlkMavXYT+FOy6xM= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=agVWJYch; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="agVWJYch" Received: by smtp.kernel.org (Postfix) with ESMTPSA id E3F55C4CED1; Thu, 13 Feb 2025 14:32:27 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1739457148; bh=IrHxXXz5SmKsl3tcE3Vi7aZHmRn43RUp0sJQ7KwLOHA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=agVWJYchaHbeC62MWQAMSBvpCqb45Xw3hhgP47cRV+qTOCSxUQ7R+4nfbwzfPeM2v DqybSEI7Prq/lxs5l1uy+gb4zoaAb9P8st3DsfpZ8T9KuHs/Fkppbiw/64D8fSfzxR E/ZfEPcnp0KMSvHNH+97DRJHr6hWxhnAbNnA4QFI= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Maxime Ripard , Dmitry Baryshkov , Sasha Levin Subject: [PATCH 6.12 030/422] drm/bridge: ite-it66121: use eld_mutex to protect access to connector->eld Date: Thu, 13 Feb 2025 15:22:59 +0100 Message-ID: <20250213142437.718331992@linuxfoundation.org> X-Mailer: git-send-email 2.48.1 In-Reply-To: <20250213142436.408121546@linuxfoundation.org> References: <20250213142436.408121546@linuxfoundation.org> User-Agent: quilt/0.68 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.12-stable review patch. If anyone has any objections, please let me know. ------------------ From: Dmitry Baryshkov [ Upstream commit 39ead6e02ea7d19b421e9d42299d4293fed3064e ] 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-v2-3-c9bce1ee8bea@linaro.org Signed-off-by: Dmitry Baryshkov Signed-off-by: Sasha Levin --- drivers/gpu/drm/bridge/ite-it66121.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/gpu/drm/bridge/ite-it66121.c b/drivers/gpu/drm/bridge/ite-it66121.c index 925e42f46cd87..0f8d3ab30daa6 100644 --- a/drivers/gpu/drm/bridge/ite-it66121.c +++ b/drivers/gpu/drm/bridge/ite-it66121.c @@ -1452,8 +1452,10 @@ static int it66121_audio_get_eld(struct device *dev, void *data, dev_dbg(dev, "No connector present, passing empty EDID data"); memset(buf, 0, len); } else { + mutex_lock(&ctx->connector->eld_mutex); memcpy(buf, ctx->connector->eld, min(sizeof(ctx->connector->eld), len)); + mutex_unlock(&ctx->connector->eld_mutex); } mutex_unlock(&ctx->lock); -- 2.39.5