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 X-Spam-Level: X-Spam-Status: No, score=-6.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id A5B48C352A3 for ; Mon, 10 Feb 2020 12:47:15 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 764E620708 for ; Mon, 10 Feb 2020 12:47:15 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1581338835; bh=5gg7xp34r4GTw4ZoPXvRD8qjjJSE+u94enWT0OdkQXE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=XpD7+cZRRmAqcmihcluctSauxXWhWGmBDLeUf1uQ05Z5lR+a4DsZ6GW+vJ2wLFI5X jR9GHZpvTV8eVCUnQX2LCTJAsJNhGgtZPmilvj9uyUlGe0mC9Lic5bQ79F0acG+n9h rJRygNAgFldfTaVfTM9Rerk22yU1QzFpzu05l/KQ= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729904AbgBJMrN (ORCPT ); Mon, 10 Feb 2020 07:47:13 -0500 Received: from mail.kernel.org ([198.145.29.99]:45550 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730130AbgBJMmB (ORCPT ); Mon, 10 Feb 2020 07:42:01 -0500 Received: from localhost (unknown [209.37.97.194]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 519D220838; Mon, 10 Feb 2020 12:42:01 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1581338521; bh=5gg7xp34r4GTw4ZoPXvRD8qjjJSE+u94enWT0OdkQXE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=BVBZuZEOVlmdqsrMEsYSrXqJ+ZE/ptkSyCkRobktkzcIxzP1kZfO03ui5++XJxbRP uA9ywF2XiGv+kO0ytmZ5t/htMBLSoFZt3OHMVGWmsduuxF1eBUvLCUQbQGbEVSofzG aB1UxO2CAceVGNYvbwn4eO597PrnAaANtFgnjQMc= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Yishai Hadas , Artemy Kovalyov , Jason Gunthorpe , Leon Romanovsky Subject: [PATCH 5.5 295/367] IB/core: Fix ODP get user pages flow Date: Mon, 10 Feb 2020 04:33:28 -0800 Message-Id: <20200210122450.940348123@linuxfoundation.org> X-Mailer: git-send-email 2.25.0 In-Reply-To: <20200210122423.695146547@linuxfoundation.org> References: <20200210122423.695146547@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Yishai Hadas commit d07de8bd1709a80a282963ad7b2535148678a9e4 upstream. The nr_pages argument of get_user_pages_remote() should always be in terms of the system page size, not the MR page size. Use PAGE_SIZE instead of umem_odp->page_shift. Fixes: 403cd12e2cf7 ("IB/umem: Add contiguous ODP support") Link: https://lore.kernel.org/r/20191222124649.52300-3-leon@kernel.org Signed-off-by: Yishai Hadas Reviewed-by: Artemy Kovalyov Reviewed-by: Jason Gunthorpe Signed-off-by: Leon Romanovsky Signed-off-by: Jason Gunthorpe Signed-off-by: Greg Kroah-Hartman --- drivers/infiniband/core/umem_odp.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/drivers/infiniband/core/umem_odp.c +++ b/drivers/infiniband/core/umem_odp.c @@ -440,7 +440,7 @@ int ib_umem_odp_map_dma_pages(struct ib_ while (bcnt > 0) { const size_t gup_num_pages = min_t(size_t, - (bcnt + BIT(page_shift) - 1) >> page_shift, + ALIGN(bcnt, PAGE_SIZE) / PAGE_SIZE, PAGE_SIZE / sizeof(struct page *)); down_read(&owning_mm->mmap_sem);