From patchwork Mon Jun 22 06:53:25 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Maulik Shah X-Patchwork-Id: 194645 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.8 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED, USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 65B3FC433E0 for ; Mon, 22 Jun 2020 06:53:49 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 4522025432 for ; Mon, 22 Jun 2020 06:53:49 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=mg.codeaurora.org header.i=@mg.codeaurora.org header.b="h+vcaxqj" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726759AbgFVGxs (ORCPT ); Mon, 22 Jun 2020 02:53:48 -0400 Received: from mail29.static.mailgun.info ([104.130.122.29]:35949 "EHLO mail29.static.mailgun.info" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731287AbgFVGxq (ORCPT ); Mon, 22 Jun 2020 02:53:46 -0400 DKIM-Signature: a=rsa-sha256; v=1; c=relaxed/relaxed; d=mg.codeaurora.org; q=dns/txt; s=smtp; t=1592808825; h=Message-Id: Date: Subject: Cc: To: From: Sender; bh=o2YYaXC6PIfOD5o+rRYmzT173G08up0bWdnLaswSdXE=; b=h+vcaxqjREtVFiWbxEEkq0ECLqC16uLxFUUhgIRQgbtmfXdj5qA5OkOYGmqNmuGQvkdxk6d4 qSDUbkCJsC28e1TY2A9zCseYIV7guY+9ImZtDg8jS354+Y0pOaJntsORiyJ6BOHfzcr146K4 uq+pA/zSPA7nmz893wyL8lOpJQs= X-Mailgun-Sending-Ip: 104.130.122.29 X-Mailgun-Sid: WyI1MzIzYiIsICJsaW51eC1hcm0tbXNtQHZnZXIua2VybmVsLm9yZyIsICJiZTllNGEiXQ== Received: from smtp.codeaurora.org (ec2-35-166-182-171.us-west-2.compute.amazonaws.com [35.166.182.171]) by smtp-out-n07.prod.us-east-1.postgun.com with SMTP id 5ef05577c4bb4f886da5285d (version=TLS1.2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256); Mon, 22 Jun 2020 06:53:43 GMT Received: by smtp.codeaurora.org (Postfix, from userid 1001) id 58A58C433C8; Mon, 22 Jun 2020 06:53:42 +0000 (UTC) Received: from mkshah-linux.qualcomm.com (blr-c-bdr-fw-01_GlobalNAT_AllZones-Outside.qualcomm.com [103.229.19.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-SHA256 (128/128 bits)) (No client certificate requested) (Authenticated sender: mkshah) by smtp.codeaurora.org (Postfix) with ESMTPSA id 00A36C433C6; Mon, 22 Jun 2020 06:53:37 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org 00A36C433C6 Authentication-Results: aws-us-west-2-caf-mail-1.web.codeaurora.org; dmarc=none (p=none dis=none) header.from=codeaurora.org Authentication-Results: aws-us-west-2-caf-mail-1.web.codeaurora.org; spf=none smtp.mailfrom=mkshah@codeaurora.org From: Maulik Shah To: bjorn.andersson@linaro.org, agross@kernel.org Cc: linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org, dianders@chromium.org, swboyd@chromium.org, rnayak@codeaurora.org, ilina@codeaurora.org, lsrao@codeaurora.org, Maulik Shah Subject: [PATCH] soc: qcom: rpmh-rsc: Set suppress_bind_attrs flag Date: Mon, 22 Jun 2020 12:23:25 +0530 Message-Id: <1592808805-2437-1-git-send-email-mkshah@codeaurora.org> X-Mailer: git-send-email 2.7.4 Sender: linux-arm-msm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org rpmh-rsc driver is fairly core to system and should not be removable once its probed. However it allows to unbind driver from sysfs using below command which results into a crash on sc7180. echo 18200000.rsc > /sys/bus/platform/drivers/rpmh/unbind Lets prevent unbind at runtime by setting suppress_bind_attrs flag. Signed-off-by: Maulik Shah --- drivers/soc/qcom/rpmh-rsc.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/soc/qcom/rpmh-rsc.c b/drivers/soc/qcom/rpmh-rsc.c index 076fd27..752a561 100644 --- a/drivers/soc/qcom/rpmh-rsc.c +++ b/drivers/soc/qcom/rpmh-rsc.c @@ -1023,6 +1023,7 @@ static struct platform_driver rpmh_driver = { .driver = { .name = "rpmh", .of_match_table = rpmh_drv_match, + .suppress_bind_attrs = true, }, };