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=-20.2 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_AGENT_GIT autolearn=unavailable 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 2BFF2C6379D for ; Mon, 19 Jul 2021 15:57:36 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 19796613F2 for ; Mon, 19 Jul 2021 15:57:36 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1346686AbhGSPPA (ORCPT ); Mon, 19 Jul 2021 11:15:00 -0400 Received: from mail.kernel.org ([198.145.29.99]:40436 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1343765AbhGSOsd (ORCPT ); Mon, 19 Jul 2021 10:48:33 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 125BC61248; Mon, 19 Jul 2021 15:24:44 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1626708285; bh=JnqOo6e8vJHDhZEst7h5OxBKz9ibCdmtPW/E9fJiiCE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=e/rIMCemRarSfbtnV/6TQC2kZ3eQvM05J815pl5UdgYloySUjVPrQDCDY/wxctjiF aYuD/LNJzFg5i9E2KurxKH4kBZZ7EGgHsp+TfI3ski14j1mbMfSrpI0JSJfs4naVE+ FTH8M1qBpO+KN0VWy9WqF4JFQlPpQrKaNU5G9//k= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Geoff Levand , Michael Ellerman , Sasha Levin Subject: [PATCH 4.14 251/315] powerpc/ps3: Add dma_mask to ps3_dma_region Date: Mon, 19 Jul 2021 16:52:20 +0200 Message-Id: <20210719144951.679205919@linuxfoundation.org> X-Mailer: git-send-email 2.32.0 In-Reply-To: <20210719144942.861561397@linuxfoundation.org> References: <20210719144942.861561397@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Geoff Levand [ Upstream commit 9733862e50fdba55e7f1554e4286fcc5302ff28e ] Commit f959dcd6ddfd29235030e8026471ac1b022ad2b0 (dma-direct: Fix potential NULL pointer dereference) added a null check on the dma_mask pointer of the kernel's device structure. Add a dma_mask variable to the ps3_dma_region structure and set the device structure's dma_mask pointer to point to this new variable. Fixes runtime errors like these: # WARNING: Fixes tag on line 10 doesn't match correct format # WARNING: Fixes tag on line 10 doesn't match correct format ps3_system_bus_match:349: dev=8.0(sb_01), drv=8.0(ps3flash): match WARNING: CPU: 0 PID: 1 at kernel/dma/mapping.c:151 .dma_map_page_attrs+0x34/0x1e0 ps3flash sb_01: ps3stor_setup:193: map DMA region failed Signed-off-by: Geoff Levand Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/562d0c9ea0100a30c3b186bcc7adb34b0bbd2cd7.1622746428.git.geoff@infradead.org Signed-off-by: Sasha Levin --- arch/powerpc/include/asm/ps3.h | 2 ++ arch/powerpc/platforms/ps3/mm.c | 12 ++++++++++++ 2 files changed, 14 insertions(+) diff --git a/arch/powerpc/include/asm/ps3.h b/arch/powerpc/include/asm/ps3.h index 17ee719e799f..013d24d246d6 100644 --- a/arch/powerpc/include/asm/ps3.h +++ b/arch/powerpc/include/asm/ps3.h @@ -83,6 +83,7 @@ struct ps3_dma_region_ops; * @bus_addr: The 'translated' bus address of the region. * @len: The length in bytes of the region. * @offset: The offset from the start of memory of the region. + * @dma_mask: Device dma_mask. * @ioid: The IOID of the device who owns this region * @chunk_list: Opaque variable used by the ioc page manager. * @region_ops: struct ps3_dma_region_ops - dma region operations @@ -97,6 +98,7 @@ struct ps3_dma_region { enum ps3_dma_region_type region_type; unsigned long len; unsigned long offset; + u64 dma_mask; /* driver variables (set by ps3_dma_region_create) */ unsigned long bus_addr; diff --git a/arch/powerpc/platforms/ps3/mm.c b/arch/powerpc/platforms/ps3/mm.c index 19bae78b1f25..76cbf1be9962 100644 --- a/arch/powerpc/platforms/ps3/mm.c +++ b/arch/powerpc/platforms/ps3/mm.c @@ -18,6 +18,7 @@ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ +#include #include #include #include @@ -1132,6 +1133,7 @@ int ps3_dma_region_init(struct ps3_system_bus_device *dev, enum ps3_dma_region_type region_type, void *addr, unsigned long len) { unsigned long lpar_addr; + int result; lpar_addr = addr ? ps3_mm_phys_to_lpar(__pa(addr)) : 0; @@ -1143,6 +1145,16 @@ int ps3_dma_region_init(struct ps3_system_bus_device *dev, r->offset -= map.r1.offset; r->len = len ? len : _ALIGN_UP(map.total, 1 << r->page_size); + dev->core.dma_mask = &r->dma_mask; + + result = dma_set_mask_and_coherent(&dev->core, DMA_BIT_MASK(32)); + + if (result < 0) { + dev_err(&dev->core, "%s:%d: dma_set_mask_and_coherent failed: %d\n", + __func__, __LINE__, result); + return result; + } + switch (dev->dev_type) { case PS3_DEVICE_TYPE_SB: r->region_ops = (USE_DYNAMIC_DMA) -- 2.30.2