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[209.132.180.67]) by mx.google.com with ESMTP id r5-v6si24237572pga.602.2018.07.13.23.01.30; Fri, 13 Jul 2018 23:01:45 -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; dkim=pass header.i=@gmail.com header.s=20161025 header.b=EZJif1Y5; 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; dmarc=pass (p=NONE sp=QUARANTINE dis=NONE) header.from=gmail.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726929AbeGNGQi (ORCPT + 99 others); Sat, 14 Jul 2018 02:16:38 -0400 Received: from mail-pg1-f193.google.com ([209.85.215.193]:42696 "EHLO mail-pg1-f193.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725872AbeGNGQi (ORCPT ); Sat, 14 Jul 2018 02:16:38 -0400 Received: by mail-pg1-f193.google.com with SMTP id y4-v6so5603236pgp.9 for ; Fri, 13 Jul 2018 22:58:48 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=gv/ttk0trQfJy55MpeX5eeNTfG0G7gNHcKCzMAUbWkg=; b=EZJif1Y5C56ShllWeVsvKlW+AaTWtTY3VxaJH+zd1qCtGboErUNF4BjMkd76hnmtYX o6LTPnKL2lJGJKBNrlQQ4wBMwAHAIq76XmYYOjC8T300OD7wG13U2zPMTRsGSsEiiatd 2glKIRFSuInF7HVLjtVlTT3uCXsnWhOuvlew8bZrPmWZXlI/MpA64Kymq+Rzxd5RIsxk DHeo3NUnU4eS230Q6IMY4QY1vfbVUKX+yJCOY+r6sfUr2NTnWKKVVqwTjZ0hG4FHnTpe +kTTkr2agNSAssVkcxdS+KktfEFhqIuaKdAVtjC0DB8H+IXq1qe6h2tYXgb2+WAQs4xs rkiQ== 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; bh=gv/ttk0trQfJy55MpeX5eeNTfG0G7gNHcKCzMAUbWkg=; b=TYkP7Go3iL2hBYjlhbm0rDjDpxNi40k7FZYZiJ9QojYucQMHyMLyj3eVT+9Nkrkbjy 3ZFCF+eMLeDJVTFdgrTzShjf9rWyiqw1vFTFvY6hMwA6fO5TBq5TyUxbJi3djdp3b91B taqfUSXzB/xhcOabqUl038E0K9wueeeUS6WymbrKz67whyLOMDao/iYcszgGH/9ABE8w +MVSJvXusqbA+czDT5/Np6dutSdiUUKUXHu7hYqO0Ag28SCRh3/JQwSIohbEf/POa7cS 5byvL5msGPDFVAncEBWRY4N9MOzfI+0EvPx0eekyUVmiEQWyH28/kn0z/5SL4diGpMNG Yrxg== X-Gm-Message-State: AOUpUlE4bwTnzcta11SXf4csR8l2WmH9jdu4/dL6x6Q0yCyffi71Z0TZ KzLBXI5/NT8oXXhsKQVeSHI3xWS2 X-Received: by 2002:a63:175b:: with SMTP id 27-v6mr8488284pgx.31.1531547928490; Fri, 13 Jul 2018 22:58:48 -0700 (PDT) Received: from toddpoynor2.mtv.corp.google.com ([2620:0:1000:3701:7d29:cd13:d903:7908]) by smtp.gmail.com with ESMTPSA id 203-v6sm48411112pgb.14.2018.07.13.22.58.47 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Fri, 13 Jul 2018 22:58:47 -0700 (PDT) From: Todd Poynor To: Rob Springer , John Joseph , Ben Chan , Greg Kroah-Hartman Cc: Zhongze Hu , Simon Que , Dmitry Torokhov , Guenter Roeck , devel@driverdev.osuosl.org, linux-kernel@vger.kernel.org, Todd Poynor Subject: [PATCH 04/18] staging: gasket: device registration error and unregister fixups Date: Fri, 13 Jul 2018 22:58:02 -0700 Message-Id: <20180714055816.223754-5-toddpoynor@gmail.com> X-Mailer: git-send-email 2.18.0.203.gfac676dfb9-goog In-Reply-To: <20180714055816.223754-1-toddpoynor@gmail.com> References: <20180714055816.223754-1-toddpoynor@gmail.com> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Todd Poynor Remove device registration on class creation fail. Hold mutex around device removal updates for proper ordering of updates. Signed-off-by: Zhongze Hu Signed-off-by: Todd Poynor --- drivers/staging/gasket/gasket_core.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/drivers/staging/gasket/gasket_core.c b/drivers/staging/gasket/gasket_core.c index 45914ebc8f44..3bdf7d36b397 100644 --- a/drivers/staging/gasket/gasket_core.c +++ b/drivers/staging/gasket/gasket_core.c @@ -342,7 +342,8 @@ int gasket_register_device(const struct gasket_driver_desc *driver_desc) if (IS_ERR_OR_NULL(internal->class)) { gasket_nodev_error("Cannot register %s class [ret=%ld]", driver_desc->name, PTR_ERR(internal->class)); - return PTR_ERR(internal->class); + ret = PTR_ERR(internal->class); + goto fail0; } /* @@ -376,7 +377,10 @@ int gasket_register_device(const struct gasket_driver_desc *driver_desc) fail1: class_destroy(internal->class); +fail0: + mutex_lock(&g_mutex); g_descs[desc_idx].driver_desc = NULL; + mutex_unlock(&g_mutex); return ret; } EXPORT_SYMBOL(gasket_register_device); @@ -413,7 +417,9 @@ void gasket_unregister_device(const struct gasket_driver_desc *driver_desc) class_destroy(internal_desc->class); /* Finally, effectively "remove" the driver. */ + mutex_lock(&g_mutex); g_descs[desc_idx].driver_desc = NULL; + mutex_unlock(&g_mutex); gasket_nodev_info("removed %s driver", driver_desc->name); } -- 2.18.0.203.gfac676dfb9-goog