From mboxrd@z Thu Jan 1 00:00:00 1970 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=-18.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,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 E254EC43381 for ; Fri, 12 Mar 2021 16:26:09 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id B3D156502C for ; Fri, 12 Mar 2021 16:26:09 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232988AbhCLQZv (ORCPT ); Fri, 12 Mar 2021 11:25:51 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:55974 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232752AbhCLQZN (ORCPT ); Fri, 12 Mar 2021 11:25:13 -0500 Received: from mail-pg1-x530.google.com (mail-pg1-x530.google.com [IPv6:2607:f8b0:4864:20::530]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id DBBD8C061761 for ; Fri, 12 Mar 2021 08:25:12 -0800 (PST) Received: by mail-pg1-x530.google.com with SMTP id t37so5398537pga.11 for ; Fri, 12 Mar 2021 08:25:12 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=AZdJoSgIJXSU7DnQv8lIz2Iv+j4owVE3/6SK24bo6uk=; b=d1s1Hv3DdcHyErIEyqH3yVFpG5V3lO/hah7vzMM+o/RrmOi1nUUVJJOFQid7jaOFqu /Rczir59gxWk9v85psOknIOLGxz5eS7nnm7Ep6hKbqUDlwv6X4I03OwKAVgFjsUxH1HM BNLWxdZW38ZWyLki1U9PPsl0jwcvcalk0qqzsTPkbFM2aGqBnPn5hQNsZ8qC0VrReK9i 2GjsDzxSpOm0tQslrAm1L0BkD4b70za/K1TPwEkOLFIonRExzcK3V+kk+GRt1dRbyTV6 x1dovn6BBe6Dh/sU0KgszeIAzVaPQhtOf5oNCiKqXC99VHyUbYqyTNQWk/HfJVfs/mMD mgQA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=AZdJoSgIJXSU7DnQv8lIz2Iv+j4owVE3/6SK24bo6uk=; b=syjmNEVyqsfbBYBWIKkitVhzsD/Oc5zCeZbs5MZ9auOa1S7SgnMfRRhucdYc0VI/pq EbgBNTfW1lNqK/e/ocjyDZA0ldsAgXb1QCYodyx7bhq7sBOP88iOYkApTiRWEsxZqMSh i/lPnWl/GyveMXKoUIM1pnLY6TDO3iOViqPEf/iCLbdFmfR2S9ugmR5UdZPS7UAyeKBu 0ivhGAxoAy4ims/tgBjYwmGJ04rRW2Q2QYdzcHnzDNOD6sf0F5FhgMYzEQDH5WIzoWuW zUchIQBWc5OaYTQP1E8L0OdV8zFRUPtu3myjyO1+bzJ7PQi7kbrRldKjYR/7Wxemyy3o incQ== X-Gm-Message-State: AOAM531wPT4jP25yKk3T7aSsGSIvxNw3LdSSMgsqkjpzNe/Zv5ee0eao rQrT5T0oljDJT84m2f/eHewGPQ== X-Google-Smtp-Source: ABdhPJxlMqe1nJc8niT81bokl2i7FzDOOm3XanPm1WN7Go5cCc4RR+0tUjxJNLyH76LMmwJwrNFCvw== X-Received: by 2002:a63:d0f:: with SMTP id c15mr12221198pgl.367.1615566312454; Fri, 12 Mar 2021 08:25:12 -0800 (PST) Received: from xps15.cg.shawcable.net (S0106889e681aac74.cg.shawcable.net. [68.147.0.187]) by smtp.gmail.com with ESMTPSA id e8sm5899599pgb.35.2021.03.12.08.25.11 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 12 Mar 2021 08:25:12 -0800 (PST) From: Mathieu Poirier To: bjorn.andersson@linaro.org, ohad@wizery.com Cc: arnaud.pouliquen@st.com, mcoquelin.stm32@gmail.com, alexandre.torgue@st.com, linux-remoteproc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org Subject: [PATCH v8 15/17] remoteproc: Properly deal with a stop request when attached Date: Fri, 12 Mar 2021 09:24:51 -0700 Message-Id: <20210312162453.1234145-16-mathieu.poirier@linaro.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210312162453.1234145-1-mathieu.poirier@linaro.org> References: <20210312162453.1234145-1-mathieu.poirier@linaro.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Allow a remote processor that was started by another entity to be switched off by the remoteproc core. For that to happen a rproc::ops::stop() operation needs to be available. Signed-off-by: Mathieu Poirier Reviewed-by: Arnaud Pouliquen --- drivers/remoteproc/remoteproc_cdev.c | 3 ++- drivers/remoteproc/remoteproc_core.c | 4 ++++ drivers/remoteproc/remoteproc_sysfs.c | 3 ++- 3 files changed, 8 insertions(+), 2 deletions(-) diff --git a/drivers/remoteproc/remoteproc_cdev.c b/drivers/remoteproc/remoteproc_cdev.c index b2cee9afb41b..0249d8f6c3f8 100644 --- a/drivers/remoteproc/remoteproc_cdev.c +++ b/drivers/remoteproc/remoteproc_cdev.c @@ -38,7 +38,8 @@ static ssize_t rproc_cdev_write(struct file *filp, const char __user *buf, size_ ret = rproc_boot(rproc); } else if (!strncmp(cmd, "stop", len)) { - if (rproc->state != RPROC_RUNNING) + if (rproc->state != RPROC_RUNNING && + rproc->state != RPROC_ATTACHED) return -EINVAL; rproc_shutdown(rproc); diff --git a/drivers/remoteproc/remoteproc_core.c b/drivers/remoteproc/remoteproc_core.c index c00f3f8bdfcc..c985c5f6f2f8 100644 --- a/drivers/remoteproc/remoteproc_core.c +++ b/drivers/remoteproc/remoteproc_core.c @@ -1796,6 +1796,10 @@ static int rproc_stop(struct rproc *rproc, bool crashed) struct device *dev = &rproc->dev; int ret; + /* No need to continue if a stop() operation has not been provided */ + if (!rproc->ops->stop) + return -EINVAL; + /* Stop any subdevices for the remote processor */ rproc_stop_subdevices(rproc, crashed); diff --git a/drivers/remoteproc/remoteproc_sysfs.c b/drivers/remoteproc/remoteproc_sysfs.c index 66801e6fe5cd..09eb700c5e7e 100644 --- a/drivers/remoteproc/remoteproc_sysfs.c +++ b/drivers/remoteproc/remoteproc_sysfs.c @@ -202,7 +202,8 @@ static ssize_t state_store(struct device *dev, if (ret) dev_err(&rproc->dev, "Boot failed: %d\n", ret); } else if (sysfs_streq(buf, "stop")) { - if (rproc->state != RPROC_RUNNING) + if (rproc->state != RPROC_RUNNING && + rproc->state != RPROC_ATTACHED) return -EINVAL; rproc_shutdown(rproc); -- 2.25.1