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=-19.4 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,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 812EBC07E9B for ; Sat, 10 Jul 2021 02:42:25 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 67FE5613F0 for ; Sat, 10 Jul 2021 02:42:25 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235604AbhGJCpI (ORCPT ); Fri, 9 Jul 2021 22:45:08 -0400 Received: from mail.kernel.org ([198.145.29.99]:34508 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231944AbhGJCnq (ORCPT ); Fri, 9 Jul 2021 22:43:46 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id D3BDC613C8; Sat, 10 Jul 2021 02:39:25 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1625884766; bh=x58gpLQeByz1VzpEf4ha9kXrLaM2EdD7QyXJTnbA8HE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=TeC9faF9LYT4ac6H9I6/RsEWTg3/IeUkAMvc7bkYTBXDZLYYuVLjJTwo2jwOXBwtw Cy9/dYfcp/QSsP+FTiUu3dqfv5RwXEto9zaOYH/Ff6sglKsDb5K26PYyUZ0BeOagnK jwi7B0wYnbBxvUEh/Omc1Sw0auKWPKPLbzg2St7HIG4+wHfDBWi5kHETJgSRvnL1ec Mq5NBK2ibEggKLI7GPwZGptAzRi4w7Nsf+jfikiZUbUnuob7htvvSSVCcdp142FMAX 9HViGl3FLJr47TsvLOmsfG9CPhLjL4RPlsm8ZhMq2diSTpVLjw+iE+ql872P5wyvd1 gI0ahsoIP0W9g== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Geoff Levand , Michael Ellerman , Sasha Levin , linuxppc-dev@lists.ozlabs.org Subject: [PATCH AUTOSEL 4.4 11/23] powerpc/ps3: Add dma_mask to ps3_dma_region Date: Fri, 9 Jul 2021 22:39:00 -0400 Message-Id: <20210710023912.3172972-11-sashal@kernel.org> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20210710023912.3172972-1-sashal@kernel.org> References: <20210710023912.3172972-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore 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 a1bc7e758422..2d729b53a556 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