From patchwork Thu Dec 30 04:38:14 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Hangyu Hua X-Patchwork-Id: 529090 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 417B4C433EF for ; Thu, 30 Dec 2021 04:38:39 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235958AbhL3Eig (ORCPT ); Wed, 29 Dec 2021 23:38:36 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50718 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235954AbhL3Eif (ORCPT ); Wed, 29 Dec 2021 23:38:35 -0500 Received: from mail-pg1-x541.google.com (mail-pg1-x541.google.com [IPv6:2607:f8b0:4864:20::541]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id F2DD0C061574; Wed, 29 Dec 2021 20:38:34 -0800 (PST) Received: by mail-pg1-x541.google.com with SMTP id r5so20440079pgi.6; Wed, 29 Dec 2021 20:38:34 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=HVwajQHhZd85KIJ2Q7ggiBUzMG1h9q9fZGknQXtFqUc=; b=TS+iO9SZIgGR4ABvM2YsSTMoO5vHWMQCyFtNPXXNK+thw0d0zhed4V9htc02CgQtRU +zBFOlMOjWH/bYxIQxQ8qKf9mut4hQgMov7EpIx7Bzv4c7uZINiMFQj5vC0AXjBHbCTI TZW8lRhHXU5dPPnSpjkcGNuFKCWzEdsHbZxHZqo8ulOJGaJd7HpEG8z6GBWpUnMP7SRL GH80kBDYN03PNICmYbJ6o2c/1uOrSq6XC4YGa4nzDzhIR4bJ7s5HdodKHusR6zI9XZFS bsnjdsbBJTz4glPN7mLHKdC23JBGefaiCRrJLONwGK/fdDRtSYz4SVNFO20CwC74Kt+n ce1A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=HVwajQHhZd85KIJ2Q7ggiBUzMG1h9q9fZGknQXtFqUc=; b=51cQgF01a4onpOyVNJNHKRYBrISRoqtZaDlSyN+3VY+m9zLhUCt9YGN1fpXKd4PgdF qAAEpEfaimShnWrlWZg1SCOsvvzAuyHNRFPqpbN5KIoTjgC3Ia/DhYdys6SnXkHXNTpZ PgWYRsKO49IO4Pv6elRl0uRuzTjJZicJvr9lQeQbjumA/4GvAD3Qq2toLtO4HUXdWuLa SAwh1XQ04WlSELDcWAUroWa8ScunPf/MEnpqVavR9Qnq1PdVnD8ITQ3KRQiqT85+Luah 4sv9fcmomQLryAIXCDCHytzsradkWihPqzrLbe+7qJ6QgiJozQBaaAIRUChkzBcsANKz kuyg== X-Gm-Message-State: AOAM530YXrhwD9BHze5KsBHm8hAKMBs14PtlnKoaaeTt6wLOMBnV/yx1 9jn7hXzdxNl9W/X0aEMduTc= X-Google-Smtp-Source: ABdhPJyB5Qg3SQxEKWYuJ0vJhppHCXVdX3sqRKGoGAANxMAQ/rvd/StWMHPyt2/nDx2QKIxRznEXcw== X-Received: by 2002:a63:3d84:: with SMTP id k126mr24954326pga.410.1640839114606; Wed, 29 Dec 2021 20:38:34 -0800 (PST) Received: from slim.das-security.cn ([103.84.139.53]) by smtp.gmail.com with ESMTPSA id g16sm22828808pfv.159.2021.12.29.20.38.32 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 29 Dec 2021 20:38:34 -0800 (PST) From: Hangyu Hua To: balbi@kernel.org, gregkh@linuxfoundation.org, axboe@kernel.dk, stern@rowland.harvard.edu, jj251510319013@gmail.com, dan.carpenter@oracle.com Cc: linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org, Hangyu Hua Subject: [PATCH v2 1/2] usb: gadget: don't release an existing dev->buf Date: Thu, 30 Dec 2021 12:38:14 +0800 Message-Id: <20211230043815.18899-2-hbh25y@gmail.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20211230043815.18899-1-hbh25y@gmail.com> References: <20211230043815.18899-1-hbh25y@gmail.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org dev->buf does not need to be released if it already exists before executing dev_config. Acked-by: Alan Stern Signed-off-by: Hangyu Hua --- drivers/usb/gadget/legacy/inode.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/usb/gadget/legacy/inode.c b/drivers/usb/gadget/legacy/inode.c index 3b58f4fc0a80..564352035ac1 100644 --- a/drivers/usb/gadget/legacy/inode.c +++ b/drivers/usb/gadget/legacy/inode.c @@ -1826,8 +1826,9 @@ dev_config (struct file *fd, const char __user *buf, size_t len, loff_t *ptr) spin_lock_irq (&dev->lock); value = -EINVAL; if (dev->buf) { + spin_unlock_irq(&dev->lock); kfree(kbuf); - goto fail; + return value; } dev->buf = kbuf;