From mboxrd@z Thu Jan 1 00:00:00 1970 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 66ED8C433EF for ; Thu, 23 Dec 2021 13:40:42 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S243667AbhLWNkl (ORCPT ); Thu, 23 Dec 2021 08:40:41 -0500 Received: from smtp-out1.suse.de ([195.135.220.28]:39616 "EHLO smtp-out1.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S238660AbhLWNkk (ORCPT ); Thu, 23 Dec 2021 08:40:40 -0500 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-out1.suse.de (Postfix) with ESMTPS id 304E2210E9; Thu, 23 Dec 2021 13:40:39 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.com; s=susede1; t=1640266839; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=YiDR+4/nieQeAOKbU2oGGRKnr9gCnviUV4iOLI6JEaE=; b=WltkrI0E9+OTf7AoyoEUq/NW0AJJdVW/W532pLVS22+geMWuQ3Y+LDexxHpI/KUZCr6zsg lcFDTd5Anq5eGhPFQyEYaKPFxn8qpo0/m7q0xF5Uc6IH2BwXQgqqN9xrbXsFyJVZqNw8yV ck0ypeaCk8+e3rpdxqzjugGJueUDxqc= 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 137D513E38; Thu, 23 Dec 2021 13:40:39 +0000 (UTC) Received: from dovecot-director2.suse.de ([192.168.254.65]) by imap2.suse-dmz.suse.de with ESMTPSA id xkt1A1d8xGFfYwAAMHmgww (envelope-from ); Thu, 23 Dec 2021 13:40:39 +0000 Subject: Re: [PATCH] xen/blkfront: fix bug in backported patch To: Greg KH Cc: stable@vger.kernel.org, xen-devel@lists.xenproject.org References: <20211223105308.17077-1-jgross@suse.com> From: Juergen Gross Message-ID: <9823fe0a-2db4-bc4b-2d7c-6363856322ff@suse.com> Date: Thu, 23 Dec 2021 14:40:38 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.12.0 MIME-Version: 1.0 In-Reply-To: Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="oILMpFocktKvEJeoHQm73Ou8ctrcT6kw8" Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org This is an OpenPGP/MIME signed message (RFC 4880 and 3156) --oILMpFocktKvEJeoHQm73Ou8ctrcT6kw8 Content-Type: multipart/mixed; boundary="Ok42bv1j9tp6S394x4lJffOiY8w0Ljwyl"; protected-headers="v1" From: Juergen Gross To: Greg KH Cc: stable@vger.kernel.org, xen-devel@lists.xenproject.org Message-ID: <9823fe0a-2db4-bc4b-2d7c-6363856322ff@suse.com> Subject: Re: [PATCH] xen/blkfront: fix bug in backported patch References: <20211223105308.17077-1-jgross@suse.com> In-Reply-To: --Ok42bv1j9tp6S394x4lJffOiY8w0Ljwyl Content-Type: multipart/mixed; boundary="------------A7AFA908A67E80CD1F635943" Content-Language: en-US This is a multi-part message in MIME format. --------------A7AFA908A67E80CD1F635943 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: quoted-printable On 23.12.21 11:57, Greg KH wrote: > On Thu, Dec 23, 2021 at 11:53:08AM +0100, Juergen Gross wrote: >> The backport of commit 8f5a695d99000fc ("xen/blkfront: don't take loca= l >> copy of a request from the ring page") to stable 4.4 kernel introduced= >> a bug when adding the needed blkif_ring_get_request() function, as >> info->ring.req_prod_pvt was incremented twice now. >> >> Fix that be deleting the now superfluous increments after calling that= >> function. >> >> Signed-off-by: Juergen Gross >> --- >> drivers/block/xen-blkfront.c | 4 ---- >> 1 file changed, 4 deletions(-) >=20 > So this is only needed in 4.4.y? No other backports were incorrect? Yes. 4.4 only. 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