From patchwork Wed May 16 05:43:45 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 10402733 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 1CD93601D2 for ; Wed, 16 May 2018 05:47:00 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 0C92C28733 for ; Wed, 16 May 2018 05:47:00 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 013C128761; Wed, 16 May 2018 05:46:59 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.8 required=2.0 tests=BAYES_00,DKIM_SIGNED, MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI, T_DKIM_INVALID autolearn=unavailable version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 978F728733 for ; Wed, 16 May 2018 05:46:59 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752802AbeEPFqq (ORCPT ); Wed, 16 May 2018 01:46:46 -0400 Received: from bombadil.infradead.org ([198.137.202.133]:58124 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752627AbeEPFoy (ORCPT ); Wed, 16 May 2018 01:44:54 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20170209; h=References:In-Reply-To:Message-Id: Date:Subject:Cc:To:From:Sender:Reply-To:MIME-Version:Content-Type: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Id: List-Help:List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=PkV8qk1N19FTgKb3nSMfmQEjgTd3Qdr314g99OeUqOs=; b=FOm2NV9Rmxz7OfIwBhCpy/5Bh RoVDHazDvzUkUaNKWiwOVdX9h/SN+ZyD1D20l153FGyVpqq5Ft84OtEUp3kJh3NmxqwfnrfATV1Aw Akfsgh6zWlZyAsq3O4ocrqoot3/yGIRNXbRT1XsoLYtc12K+jKGnZMLKzlHKNk71AXy7arBVXYCRn s2mOm8zqrAndCWdehYrn2LOqD7zqXr9b11D6JulEzPz8VRXjqHj56HSR9t3DcjpenYUu+dHGugpPc vhwByv34X5/MfpMSkecocmNNntnraG75BgqurbhuSKhfcCSwzR97ZIbcN/ICSKlRlr6pxJYKtUv2D jeZHSKQiQ==; Received: from [93.83.86.253] (helo=localhost) by bombadil.infradead.org with esmtpsa (Exim 4.90_1 #2 (Red Hat Linux)) id 1fIpEj-0008DS-CB; Wed, 16 May 2018 05:44:29 +0000 From: Christoph Hellwig To: Souptick Joarder , Matthew Wilcox Cc: linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org, devel@lists.orangefs.org, ceph-devel@vger.kernel.org, linux-btrfs@vger.kernel.org, linux-ext4@vger.kernel.org, ocfs2-devel@oss.oracle.com, linux-mtd@lists.infradead.org, dri-devel@lists.freedesktop.org, lustre-devel@lists.lustre.org, linux-arm-kernel@lists.infradead.org, linux-s390@vger.kernel.org Subject: [PATCH 11/14] ttm: separate errno from VM_FAULT_* values Date: Wed, 16 May 2018 07:43:45 +0200 Message-Id: <20180516054348.15950-12-hch@lst.de> X-Mailer: git-send-email 2.17.0 In-Reply-To: <20180516054348.15950-1-hch@lst.de> References: <20180516054348.15950-1-hch@lst.de> X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html Sender: linux-btrfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-btrfs@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Signed-off-by: Christoph Hellwig --- drivers/gpu/drm/ttm/ttm_bo_vm.c | 42 +++++++++++++++++---------------- 1 file changed, 22 insertions(+), 20 deletions(-) diff --git a/drivers/gpu/drm/ttm/ttm_bo_vm.c b/drivers/gpu/drm/ttm/ttm_bo_vm.c index 8eba95b3c737..255e7801f62c 100644 --- a/drivers/gpu/drm/ttm/ttm_bo_vm.c +++ b/drivers/gpu/drm/ttm/ttm_bo_vm.c @@ -43,10 +43,11 @@ #define TTM_BO_VM_NUM_PREFAULT 16 -static int ttm_bo_vm_fault_idle(struct ttm_buffer_object *bo, +static vm_fault_t ttm_bo_vm_fault_idle(struct ttm_buffer_object *bo, struct vm_fault *vmf) { - int ret = 0; + vm_fault_t ret = 0; + int err = 0; if (likely(!bo->moving)) goto out_unlock; @@ -77,8 +78,8 @@ static int ttm_bo_vm_fault_idle(struct ttm_buffer_object *bo, /* * Ordinary wait. */ - ret = dma_fence_wait(bo->moving, true); - if (unlikely(ret != 0)) { + err = dma_fence_wait(bo->moving, true); + if (unlikely(err != 0)) { ret = (ret != -ERESTARTSYS) ? VM_FAULT_SIGBUS : VM_FAULT_NOPAGE; goto out_unlock; @@ -104,7 +105,7 @@ static unsigned long ttm_bo_io_mem_pfn(struct ttm_buffer_object *bo, + page_offset; } -static int ttm_bo_vm_fault(struct vm_fault *vmf) +static vm_fault_t ttm_bo_vm_fault(struct vm_fault *vmf) { struct vm_area_struct *vma = vmf->vma; struct ttm_buffer_object *bo = (struct ttm_buffer_object *) @@ -115,7 +116,8 @@ static int ttm_bo_vm_fault(struct vm_fault *vmf) unsigned long pfn; struct ttm_tt *ttm = NULL; struct page *page; - int ret; + vm_fault_t ret; + int err; int i; unsigned long address = vmf->address; struct ttm_mem_type_manager *man = @@ -128,9 +130,9 @@ static int ttm_bo_vm_fault(struct vm_fault *vmf) * for reserve, and if it fails, retry the fault after waiting * for the buffer to become unreserved. */ - ret = ttm_bo_reserve(bo, true, true, NULL); - if (unlikely(ret != 0)) { - if (ret != -EBUSY) + err = ttm_bo_reserve(bo, true, true, NULL); + if (unlikely(err != 0)) { + if (err != -EBUSY) return VM_FAULT_NOPAGE; if (vmf->flags & FAULT_FLAG_ALLOW_RETRY) { @@ -162,8 +164,8 @@ static int ttm_bo_vm_fault(struct vm_fault *vmf) } if (bdev->driver->fault_reserve_notify) { - ret = bdev->driver->fault_reserve_notify(bo); - switch (ret) { + err = bdev->driver->fault_reserve_notify(bo); + switch (err) { case 0: break; case -EBUSY: @@ -191,13 +193,13 @@ static int ttm_bo_vm_fault(struct vm_fault *vmf) goto out_unlock; } - ret = ttm_mem_io_lock(man, true); - if (unlikely(ret != 0)) { + err = ttm_mem_io_lock(man, true); + if (unlikely(err != 0)) { ret = VM_FAULT_NOPAGE; goto out_unlock; } - ret = ttm_mem_io_reserve_vm(bo); - if (unlikely(ret != 0)) { + err = ttm_mem_io_reserve_vm(bo); + if (unlikely(err != 0)) { ret = VM_FAULT_SIGBUS; goto out_io_unlock; } @@ -265,21 +267,21 @@ static int ttm_bo_vm_fault(struct vm_fault *vmf) } if (vma->vm_flags & VM_MIXEDMAP) - ret = vm_insert_mixed(&cvma, address, + err = vm_insert_mixed(&cvma, address, __pfn_to_pfn_t(pfn, PFN_DEV)); else - ret = vm_insert_pfn(&cvma, address, pfn); + err = vm_insert_pfn(&cvma, address, pfn); /* * Somebody beat us to this PTE or prefaulting to * an already populated PTE, or prefaulting error. */ - if (unlikely((ret == -EBUSY) || (ret != 0 && i > 0))) + if (unlikely((err == -EBUSY) || (err != 0 && i > 0))) break; - else if (unlikely(ret != 0)) { + else if (unlikely(err != 0)) { ret = - (ret == -ENOMEM) ? VM_FAULT_OOM : VM_FAULT_SIGBUS; + (err == -ENOMEM) ? VM_FAULT_OOM : VM_FAULT_SIGBUS; goto out_io_unlock; }