From patchwork Tue Jun 28 09:35:17 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Oliver Neukum X-Patchwork-Id: 585795 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 CA0F2C43334 for ; Tue, 28 Jun 2022 09:35:24 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236075AbiF1JfX (ORCPT ); Tue, 28 Jun 2022 05:35:23 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58670 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234605AbiF1JfW (ORCPT ); Tue, 28 Jun 2022 05:35:22 -0400 Received: from smtp-out2.suse.de (smtp-out2.suse.de [195.135.220.29]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 2518827FF8; Tue, 28 Jun 2022 02:35:21 -0700 (PDT) Received: from imap2.suse-dmz.suse.de (imap2.suse-dmz.suse.de [192.168.254.74]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-521) server-digest SHA512) (No client certificate requested) by smtp-out2.suse.de (Postfix) with ESMTPS id CD17D1FE48; Tue, 28 Jun 2022 09:35:19 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.com; s=susede1; t=1656408919; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version: content-transfer-encoding:content-transfer-encoding; bh=snVDBf7QZ+8KyDVimE4gMnQ16a7xQEbi2WicFv1A7bo=; b=gSHZNgbzhMyndE2c4wjZsZ8905P/yZ711riHCyxXPDbAFxx/UyzWVqM3Q1+Dqys+iD3jet zdpzS4/j0b6zkFUWC2sL09dzsgdccMzSrwyGsi3u2uOA/1B9e91hIH98sQ63mGkFQAFXkN X4m0l5Il0NF4eJ7tsCeM3yE58dThijQ= Received: from imap2.suse-dmz.suse.de (imap2.suse-dmz.suse.de [192.168.254.74]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-521) server-digest SHA512) (No client certificate requested) by imap2.suse-dmz.suse.de (Postfix) with ESMTPS id 9677F139E9; Tue, 28 Jun 2022 09:35:19 +0000 (UTC) Received: from dovecot-director2.suse.de ([192.168.254.65]) by imap2.suse-dmz.suse.de with ESMTPSA id pswFI1fLumKCTgAAMHmgww (envelope-from ); Tue, 28 Jun 2022 09:35:19 +0000 From: Oliver Neukum To: davem@davemloft.net, netdev@vger.kernel.org, kuba@kernel.org, linux-usb@vger.kernel.org Cc: Oliver Neukum Subject: [PATCH] usbnet: fix memory allocation in helpers Date: Tue, 28 Jun 2022 11:35:17 +0200 Message-Id: <20220628093517.7469-1-oneukum@suse.com> X-Mailer: git-send-email 2.35.3 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org usbnet provides some helper functions that are also used in the context of reset() operations. During a reset the other drivers on a device are unable to operate. As that can be block drivers, a driver for another interface cannot use paging in its memory allocations without risking a deadlock. Use GFP_NOIO in the helpers. Fixes: 877bd862f32b8 ("usbnet: introduce usbnet 3 command helpers") Signed-off-by: Oliver Neukum --- drivers/net/usb/usbnet.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/net/usb/usbnet.c b/drivers/net/usb/usbnet.c index c66d2a097b0c..02b915b1e142 100644 --- a/drivers/net/usb/usbnet.c +++ b/drivers/net/usb/usbnet.c @@ -2004,7 +2004,7 @@ static int __usbnet_read_cmd(struct usbnet *dev, u8 cmd, u8 reqtype, cmd, reqtype, value, index, size); if (size) { - buf = kmalloc(size, GFP_KERNEL); + buf = kmalloc(size, GFP_NOIO); if (!buf) goto out; } @@ -2036,7 +2036,7 @@ static int __usbnet_write_cmd(struct usbnet *dev, u8 cmd, u8 reqtype, cmd, reqtype, value, index, size); if (data) { - buf = kmemdup(data, size, GFP_KERNEL); + buf = kmemdup(data, size, GFP_NOIO); if (!buf) goto out; } else {