Received: by 2002:a25:f815:0:0:0:0:0 with SMTP id u21csp486445ybd; Wed, 26 Jun 2019 01:25:23 -0700 (PDT) X-Google-Smtp-Source: APXvYqw0KgN0q6YsHd1kDjyeSwwAhO59utAQD2wSjneOUXMHgcJ0GTevuHNSe3wc0g1F4Jkz7Ttf X-Received: by 2002:a63:d84e:: with SMTP id k14mr1781291pgj.234.1561537523211; Wed, 26 Jun 2019 01:25:23 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1561537523; cv=none; d=google.com; s=arc-20160816; b=V0/vwkYEhiCmlLF+hrB4SGkbGVAI92hhFOSarCYw6ICJi4cAtlXLnwPf4IH6GTk+MP dM/LTMKsL6KEBPSbYdrynrmmPkvKb9H6Vq5/2BFefG+YARZupSCNG96JcbBGyeUHNtrM XopfJGf7t1GBECVgczgGN0Sk3Z/nXaCKvoTMBEuPbxe7W5Pu+xj0RpXPIfRHMiwMJZlY GR0yLurgOWSHIujJ2Cc4pRc6KS2cjShYDzO2a4XnuISXLvS0Fbw6feRZcnbWA1+hG6As geG7SLdtOpGsWkPZTcn+nL9hcKR1kVCYkVp5lVUbZAWnlZuvhvAxnniaiHnkFdZPi7hS V8HQ== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:content-transfer-encoding:mime-version :references:in-reply-to:date:cc:to:from:subject:message-id; bh=3cRXnIlbThrNKZ7LzWQRr14L1BfHjI5HXsJuvriLlwc=; b=bUiWMTQVvl4ZHWlMrCPNIaiaocKvF/S9TD55nRq8Sh8D//NEHjhVPpq9L3D9DH2lnD O/iIyI5i+VnaEIXzAha9LEDVgLG/iJeCuzwXGVizW/FteuCwUu5AZZKtiiDYb3YiT4Hx +aHJi/JFMHVlvxGobikOeCJjLAhs7lxhAoflde49kzIM4pPw2ZZ9fhikndX9TmFX2ig2 5GR4evlcOUxvfC9ill5Cj2/ijhegc3hzuM2fks9Okg3hiDG7jOxWGDz2f9SOyMUFbILP WSkR7FsQsCJ4QwIVUubh3VDlao2+d7d/2DgFoEofu/utLdVFlIaVFoojUQXLmYcrEKH4 2qcQ== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id k29si15759128pgl.157.2019.06.26.01.25.06; Wed, 26 Jun 2019 01:25:23 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726967AbfFZIYU (ORCPT + 99 others); Wed, 26 Jun 2019 04:24:20 -0400 Received: from mx2.suse.de ([195.135.220.15]:59490 "EHLO mx1.suse.de" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1725379AbfFZIYT (ORCPT ); Wed, 26 Jun 2019 04:24:19 -0400 X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.220.254]) by mx1.suse.de (Postfix) with ESMTP id 85C7EAD18; Wed, 26 Jun 2019 08:24:18 +0000 (UTC) Message-ID: <1561536635.23604.8.camel@suse.com> Subject: Re: [RFC] deadlock with flush_work() in UAS From: Oliver Neukum To: Alan Stern Cc: Tejun Heo , Kernel development list , USB list Date: Wed, 26 Jun 2019 10:10:35 +0200 In-Reply-To: References: Content-Type: text/plain; charset="UTF-8" X-Mailer: Evolution 3.26.6 Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Am Montag, den 24.06.2019, 10:22 -0400 schrieb Alan Stern: > But that pattern makes no sense; a driver would never use it. The > driver would just do the reset itself. Correct. But UAS and storage themselves still need to use WQ_MEM_RECLAIM for their workqueues, don't they? Regards Oliver