From patchwork Tue Aug 7 16:45:42 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tony Battersby X-Patchwork-Id: 10558903 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 6D75E13B4 for ; Tue, 7 Aug 2018 16:45:46 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 58E1E2A688 for ; Tue, 7 Aug 2018 16:45:46 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 49B082A6B5; Tue, 7 Aug 2018 16:45:46 +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=-7.9 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI autolearn=ham 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 CE0C62A688 for ; Tue, 7 Aug 2018 16:45:45 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2388543AbeHGTAy (ORCPT ); Tue, 7 Aug 2018 15:00:54 -0400 Received: from mail.cybernetics.com ([173.71.130.66]:56396 "EHLO mail.cybernetics.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727286AbeHGTAx (ORCPT ); Tue, 7 Aug 2018 15:00:53 -0400 X-ASG-Debug-ID: 1533660342-0fb3b01fb342b830001-ziuLRu Received: from cybernetics.com ([10.157.1.126]) by mail.cybernetics.com with ESMTP id ckqYIo1C7Ii7OcuH (version=SSLv3 cipher=DES-CBC3-SHA bits=112 verify=NO); Tue, 07 Aug 2018 12:45:42 -0400 (EDT) X-Barracuda-Envelope-From: tonyb@cybernetics.com X-ASG-Whitelist: Client Received: from [10.157.2.224] (account tonyb HELO [192.168.200.1]) by cybernetics.com (CommuniGate Pro SMTP 5.1.14) with ESMTPSA id 8324853; Tue, 07 Aug 2018 12:45:42 -0400 To: Matthew Wilcox , Christoph Hellwig , Marek Szyprowski , Sathya Prakash , Chaitra P B , Suganath Prabu Subramani , "iommu@lists.linux-foundation.org" , "linux-mm@kvack.org" , "linux-scsi@vger.kernel.org" , "MPT-FusionLinux.pdl@broadcom.com" From: Tony Battersby Subject: [PATCH v3 02/10] dmapool: remove checks for dev == NULL Message-ID: <99c5f149-90a7-dcc5-73a5-179ca009f914@cybernetics.com> X-ASG-Orig-Subj: [PATCH v3 02/10] dmapool: remove checks for dev == NULL Date: Tue, 7 Aug 2018 12:45:42 -0400 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.9.1 MIME-Version: 1.0 Content-Language: en-US X-Barracuda-Connect: UNKNOWN[10.157.1.126] X-Barracuda-Start-Time: 1533660342 X-Barracuda-Encrypted: DES-CBC3-SHA X-Barracuda-URL: https://10.157.1.122:443/cgi-mod/mark.cgi X-Barracuda-Scan-Msg-Size: 3650 X-Virus-Scanned: by bsmtpd at cybernetics.com X-Barracuda-BRTS-Status: 1 Sender: linux-scsi-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP dmapool originally tried to support pools without a device because dma_alloc_coherent() supports allocations without a device. But nobody ended up using dma pools without a device, so the current checks in dmapool.c for pool->dev == NULL are both insufficient and causing bloat. Remove them. Signed-off-by: Tony Battersby --- Changes since v2: *) This was "dmapool: cleanup error messages" in v2. *) Remove one more check for dev == NULL in dma_pool_destroy() that is unrelated to error messages. --- linux/mm/dmapool.c.orig 2018-08-03 16:12:23.000000000 -0400 +++ linux/mm/dmapool.c 2018-08-03 16:13:44.000000000 -0400 @@ -277,7 +277,7 @@ void dma_pool_destroy(struct dma_pool *p mutex_lock(&pools_reg_lock); mutex_lock(&pools_lock); list_del(&pool->pools); - if (pool->dev && list_empty(&pool->dev->dma_pools)) + if (list_empty(&pool->dev->dma_pools)) empty = true; mutex_unlock(&pools_lock); if (empty) @@ -289,13 +289,9 @@ void dma_pool_destroy(struct dma_pool *p page = list_entry(pool->page_list.next, struct dma_page, page_list); if (is_page_busy(page)) { - if (pool->dev) - dev_err(pool->dev, - "dma_pool_destroy %s, %p busy\n", - pool->name, page->vaddr); - else - pr_err("dma_pool_destroy %s, %p busy\n", - pool->name, page->vaddr); + dev_err(pool->dev, + "dma_pool_destroy %s, %p busy\n", + pool->name, page->vaddr); /* leak the still-in-use consistent memory */ list_del(&page->page_list); kfree(page); @@ -357,13 +353,9 @@ void *dma_pool_alloc(struct dma_pool *po for (i = sizeof(page->offset); i < pool->size; i++) { if (data[i] == POOL_POISON_FREED) continue; - if (pool->dev) - dev_err(pool->dev, - "dma_pool_alloc %s, %p (corrupted)\n", - pool->name, retval); - else - pr_err("dma_pool_alloc %s, %p (corrupted)\n", - pool->name, retval); + dev_err(pool->dev, + "dma_pool_alloc %s, %p (corrupted)\n", + pool->name, retval); /* * Dump the first 4 bytes even if they are not @@ -418,13 +410,9 @@ void dma_pool_free(struct dma_pool *pool page = pool_find_page(pool, dma); if (!page) { spin_unlock_irqrestore(&pool->lock, flags); - if (pool->dev) - dev_err(pool->dev, - "dma_pool_free %s, %p/%lx (bad dma)\n", - pool->name, vaddr, (unsigned long)dma); - else - pr_err("dma_pool_free %s, %p/%lx (bad dma)\n", - pool->name, vaddr, (unsigned long)dma); + dev_err(pool->dev, + "dma_pool_free %s, %p/%lx (bad dma)\n", + pool->name, vaddr, (unsigned long)dma); return; } @@ -432,13 +420,9 @@ void dma_pool_free(struct dma_pool *pool #ifdef DMAPOOL_DEBUG if ((dma - page->dma) != offset) { spin_unlock_irqrestore(&pool->lock, flags); - if (pool->dev) - dev_err(pool->dev, - "dma_pool_free %s, %p (bad vaddr)/%pad\n", - pool->name, vaddr, &dma); - else - pr_err("dma_pool_free %s, %p (bad vaddr)/%pad\n", - pool->name, vaddr, &dma); + dev_err(pool->dev, + "dma_pool_free %s, %p (bad vaddr)/%pad\n", + pool->name, vaddr, &dma); return; } { @@ -449,12 +433,9 @@ void dma_pool_free(struct dma_pool *pool continue; } spin_unlock_irqrestore(&pool->lock, flags); - if (pool->dev) - dev_err(pool->dev, "dma_pool_free %s, dma %pad already free\n", - pool->name, &dma); - else - pr_err("dma_pool_free %s, dma %pad already free\n", - pool->name, &dma); + dev_err(pool->dev, + "dma_pool_free %s, dma %pad already free\n", + pool->name, &dma); return; } }