From patchwork Thu May 6 00:44:22 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Saravana Kannan X-Patchwork-Id: 431688 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=-26.3 required=3.0 tests=BAYES_00,DKIMWL_WL_MED, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, USER_AGENT_GIT, USER_IN_DEF_DKIM_WL 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 73E78C433ED for ; Thu, 6 May 2021 00:44:29 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 437A0613EB for ; Thu, 6 May 2021 00:44:29 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229708AbhEFApZ (ORCPT ); Wed, 5 May 2021 20:45:25 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:34140 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229497AbhEFApY (ORCPT ); Wed, 5 May 2021 20:45:24 -0400 Received: from mail-yb1-xb4a.google.com (mail-yb1-xb4a.google.com [IPv6:2607:f8b0:4864:20::b4a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 79E3BC06174A for ; Wed, 5 May 2021 17:44:27 -0700 (PDT) Received: by mail-yb1-xb4a.google.com with SMTP id o186-20020a2528c30000b02904f824478356so4225583ybo.4 for ; Wed, 05 May 2021 17:44:27 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=date:message-id:mime-version:subject:from:to:cc; bh=FIYfWaI3YWf0DYz8YdznL9GRGAZ6Fujs7G6sHSJoW08=; b=F81HM63dfakzEtPzPGJfAvVwabd9GULG3vw+sE1lsDWClbnnmHcUG6+0B/zSPxVJLZ Lr9H9/0Nf1Oc+9FXEMGfgPGWxG2kUfHxnHdSYCQqUhiSluugfSdBdIvSogMCzWTEdlEX MIcufUtVUNccgFzr1x5NgfDAyQKogQjwVv2Ug2+G/X94Fh+7iYFEq7dSXgohySMdxz4x 3pBsNZ885BulHmlf7UHqpHKrCe9bYVy6dFlLJHoyAaheg7nPN2n1ABkVtp1HCuGGjp1H Npa7NT6c05Nye4sVNxeQ9IIWT+PGLMAh4EHXtbIPGLVkkIHUYQtEKbe0/QiaY7SGlIhX cA7w== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:message-id:mime-version:subject:from:to:cc; bh=FIYfWaI3YWf0DYz8YdznL9GRGAZ6Fujs7G6sHSJoW08=; b=mH9PAS8yN9MoJoy27vBHKcCFlaxBSFw7gaZqDlYJxL+/sbtWjX95/g4zh4HZhTMyQ7 vC5HfHimxZWPkYdJGy3G5x19xWdfj3t8vXdIHSzvCrIa8PqjYN4hFxAtQ4KtIPtdXN/L rJWqCb4cr2uFzhpOgPQieQN/oMe8YoUTJoQuDmIfy3M6/GyvFbPcJH1Lr6pJSm21ILb1 +kR0zWMG10sou/E6qSWC0mCoVrX30gNrB5NAMB16+G7FdJZl8mVTeRj8DETp/WRviap6 yVN1N8uK6LVx45koD48gFOVmTuPKhrZKxT9f4KH33teb/ARud2Yr4tD4GaF4j9rDfFtR zMOQ== X-Gm-Message-State: AOAM53326PDYFSF7lrw50w2pwMkj6R8WMN/Gn1ud0fXU4pdelJTKmbqz usfBsZBBjJJmara7tfkGMbcrDJ9uBLKQIQ4= X-Google-Smtp-Source: ABdhPJywu5JWRxK+B9j2uRu1VgtWzYJwE2BP9lNYPJ54EuyBhnjLhVD53mw4Mxt1fpFfj3XMCqVb9fY4YZ7pxCE= X-Received: from saravanak.san.corp.google.com ([2620:15c:2d:3:7dba:15b:e3fd:a2e5]) (user=saravanak job=sendgmr) by 2002:a5b:f02:: with SMTP id x2mr2082887ybr.99.1620261866544; Wed, 05 May 2021 17:44:26 -0700 (PDT) Date: Wed, 5 May 2021 17:44:22 -0700 Message-Id: <20210506004423.345199-1-saravanak@google.com> Mime-Version: 1.0 X-Mailer: git-send-email 2.31.1.527.g47e6f16901-goog Subject: [PATCH v1] usb: typec: tcpm: Don't block probing of consumers of "connector" nodes From: Saravana Kannan To: Greg Kroah-Hartman , "Rafael J. Wysocki" , Guenter Roeck , Heikki Krogerus , Len Brown , Saravana Kannan Cc: John Stultz , kernel-team@android.com, linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org, linux-acpi@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-acpi@vger.kernel.org fw_devlink expects DT device nodes with "compatible" property to have struct devices created for them. Since the connector node might not be populated as a device, mark it as such so that fw_devlink knows not to wait on this fwnode being populated as a struct device. Without this patch, USB functionality can be broken on some boards. Fixes: f7514a663016 ("of: property: fw_devlink: Add support for remote-endpoint") Reported-by: John Stultz Signed-off-by: Saravana Kannan Tested-by: John Stultz --- Greg, Probably better to take this in driver-core in case I need more fixes for fw_devlink on top of this. Those fixes are more likely to land in driver-core. Hi John, Can you please test this and give a Tested-by? -Saravana drivers/base/core.c | 3 ++- drivers/usb/typec/tcpm/tcpm.c | 9 +++++++++ include/linux/fwnode.h | 1 + 3 files changed, 12 insertions(+), 1 deletion(-) diff --git a/drivers/base/core.c b/drivers/base/core.c index 4a8bf8cda52b..628e33939aca 100644 --- a/drivers/base/core.c +++ b/drivers/base/core.c @@ -150,7 +150,7 @@ void fwnode_links_purge(struct fwnode_handle *fwnode) fwnode_links_purge_consumers(fwnode); } -static void fw_devlink_purge_absent_suppliers(struct fwnode_handle *fwnode) +void fw_devlink_purge_absent_suppliers(struct fwnode_handle *fwnode) { struct fwnode_handle *child; @@ -164,6 +164,7 @@ static void fw_devlink_purge_absent_suppliers(struct fwnode_handle *fwnode) fwnode_for_each_available_child_node(fwnode, child) fw_devlink_purge_absent_suppliers(child); } +EXPORT_SYMBOL_GPL(fw_devlink_purge_absent_suppliers); #ifdef CONFIG_SRCU static DEFINE_MUTEX(device_links_lock); diff --git a/drivers/usb/typec/tcpm/tcpm.c b/drivers/usb/typec/tcpm/tcpm.c index c4fdc00a3bc8..bffa342d4e38 100644 --- a/drivers/usb/typec/tcpm/tcpm.c +++ b/drivers/usb/typec/tcpm/tcpm.c @@ -5754,6 +5754,15 @@ static int tcpm_fw_get_caps(struct tcpm_port *port, if (!fwnode) return -EINVAL; + /* + * This fwnode has a "compatible" property, but is never populated as a + * struct device. Instead we simply parse it to read the properties. + * This it breaks fw_devlink=on. To maintain backward compatibility + * with existing DT files, we work around this by deleting any + * fwnode_links to/from this fwnode. + */ + fw_devlink_purge_absent_suppliers(fwnode); + /* USB data support is optional */ ret = fwnode_property_read_string(fwnode, "data-role", &cap_str); if (ret == 0) { diff --git a/include/linux/fwnode.h b/include/linux/fwnode.h index ed4e67a7ff1c..59828516ebaf 100644 --- a/include/linux/fwnode.h +++ b/include/linux/fwnode.h @@ -187,5 +187,6 @@ extern u32 fw_devlink_get_flags(void); extern bool fw_devlink_is_strict(void); int fwnode_link_add(struct fwnode_handle *con, struct fwnode_handle *sup); void fwnode_links_purge(struct fwnode_handle *fwnode); +void fw_devlink_purge_absent_suppliers(struct fwnode_handle *fwnode); #endif