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=ham 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 3E92AC43619 for ; Wed, 10 Mar 2021 21:11:32 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 197AD64FCD for ; Wed, 10 Mar 2021 21:11:32 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232238AbhCJVLB (ORCPT ); Wed, 10 Mar 2021 16:11:01 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:33952 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232250AbhCJVKv (ORCPT ); Wed, 10 Mar 2021 16:10:51 -0500 Received: from mail-pf1-x42e.google.com (mail-pf1-x42e.google.com [IPv6:2607:f8b0:4864:20::42e]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E4E33C061756 for ; Wed, 10 Mar 2021 13:10:50 -0800 (PST) Received: by mail-pf1-x42e.google.com with SMTP id y13so9531924pfr.0 for ; Wed, 10 Mar 2021 13:10:50 -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=NN7h66rSqKzczqrKUwACdy1DE0E9dT7gEJY334oVOV4=; b=YsAjFMkpkwep25SwkBMcSnhfdoVYmzl5QqEIPCJbSwI74cnvyGX4V5wUqrnUVokUaa Wwe0fGdh9p1WmI8zDIGi0H/2xW+uWaCGsKbpdYsHH0KuFkUC1ijJUlmk4fxphEx+69qg HTt1iNg6dk3TlCiNPQpdrB5SA98/PtH21zClh6HwbkMMgDTQK3H4LD/w9Xjtuel9L87Y wrcjU/4YeLVOjlmoYb7vCgcbhXxtXTpQlm8/kA7JA0FoWh3bqIps41ay7knAgYM7n8gK gZW8oXhs0XmuEBFUWkuoZCdNwRBivGpWiQbNUe3feoCqhkONqvUdtMWWYcxvHwXnZ6+t j3/w== 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=NN7h66rSqKzczqrKUwACdy1DE0E9dT7gEJY334oVOV4=; b=CerPjzefAH+GLfiDeC46GSmtKe/OCQQn4lgdIRDnuCjoSl8paVNT4SLPEQoAo+QyCs 4K/DwzazfjcVUNztdrrIQufAJiVWS0XoW508n8dHh3PXBSGyeyCtnbBz+ebscuYwSy7J PjVcAaTWNBPkkUQ+XIGtJu1WetH8/B6d0OnWfpWcf2RIQ9nUjD/TzRslw9Dh6x95mTNr ngjEbpmkmTpuG/ucY/Etm5mg2DUtEsFn0Zq+LTfBF6IGkPvPErVhczaaDwBI0f1MSa4U /6bs37noMr6Fc2aHf77rscIf0suHl+jk1RX4GmkTfm8v9qoG0y6Vju/tXp1gRLkTFMRm 6rVg== X-Gm-Message-State: AOAM531OwsOhYJXPO4Y72osBFxgBaQt3RqNMYLkWDQ57vQ2goCUozM5l YhP+t8SBHwwTEzHGj+jA6j5BZw== X-Google-Smtp-Source: ABdhPJzs6qFZckDYQpoX8ZcZkgPLgiZxCtH5GIit2um4iAczXphI47IzrLx0Fu7OfibLOT1u5w3gIw== X-Received: by 2002:a65:4386:: with SMTP id m6mr4472767pgp.384.1615410650544; Wed, 10 Mar 2021 13:10:50 -0800 (PST) Received: from xps15.cg.shawcable.net (S0106889e681aac74.cg.shawcable.net. [68.147.0.187]) by smtp.gmail.com with ESMTPSA id j21sm371508pfc.114.2021.03.10.13.10.49 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 10 Mar 2021 13:10:49 -0800 (PST) From: Mathieu Poirier To: ohad@wizery.com, bjorn.andersson@linaro.org 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 v7 16/17] remoteproc: Properly deal with a detach request when attached Date: Wed, 10 Mar 2021 14:10:24 -0700 Message-Id: <20210310211025.1084636-17-mathieu.poirier@linaro.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210310211025.1084636-1-mathieu.poirier@linaro.org> References: <20210310211025.1084636-1-mathieu.poirier@linaro.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-remoteproc@vger.kernel.org This patch introduces the capability to detach a remote processor that has been attached to by the remoteproc core. For that to happen a rproc::ops::detach() operation needs to be available. Signed-off-by: Mathieu Poirier Reviewed-by: Arnaud Pouliquen --- drivers/remoteproc/remoteproc_cdev.c | 5 +++++ drivers/remoteproc/remoteproc_sysfs.c | 5 +++++ 2 files changed, 10 insertions(+) diff --git a/drivers/remoteproc/remoteproc_cdev.c b/drivers/remoteproc/remoteproc_cdev.c index 0249d8f6c3f8..2db494816d5f 100644 --- a/drivers/remoteproc/remoteproc_cdev.c +++ b/drivers/remoteproc/remoteproc_cdev.c @@ -43,6 +43,11 @@ static ssize_t rproc_cdev_write(struct file *filp, const char __user *buf, size_ return -EINVAL; rproc_shutdown(rproc); + } else if (!strncmp(cmd, "detach", len)) { + if (rproc->state != RPROC_ATTACHED) + return -EINVAL; + + ret = rproc_detach(rproc); } else { dev_err(&rproc->dev, "Unrecognized option\n"); ret = -EINVAL; diff --git a/drivers/remoteproc/remoteproc_sysfs.c b/drivers/remoteproc/remoteproc_sysfs.c index 09eb700c5e7e..ad3dd208024c 100644 --- a/drivers/remoteproc/remoteproc_sysfs.c +++ b/drivers/remoteproc/remoteproc_sysfs.c @@ -207,6 +207,11 @@ static ssize_t state_store(struct device *dev, return -EINVAL; rproc_shutdown(rproc); + } else if (sysfs_streq(buf, "detach")) { + if (rproc->state != RPROC_ATTACHED) + return -EINVAL; + + ret = rproc_detach(rproc); } else { dev_err(&rproc->dev, "Unrecognised option: %s\n", buf); ret = -EINVAL; -- 2.25.1