From nobody Mon Sep 29 20:17:19 2025 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id EC927C25B0D for ; Tue, 16 Aug 2022 04:33:03 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230218AbiHPEdB (ORCPT ); Tue, 16 Aug 2022 00:33:01 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:51418 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229540AbiHPEcP (ORCPT ); Tue, 16 Aug 2022 00:32:15 -0400 Received: from ams.source.kernel.org (ams.source.kernel.org [145.40.68.75]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 5AFFD98A6A; Mon, 15 Aug 2022 13:22:29 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id D2ACFB80EAD; Mon, 15 Aug 2022 20:22:27 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 27F12C433D6; Mon, 15 Aug 2022 20:22:25 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1660594946; bh=oJPBOZbTLqjwAY3V+cE4v4X+ZSxA2feGqqazogwrNxU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=leAa17qKQUrkwkNQArn0EabSoMeWzaqE92i9mwfpXK1Sl80kOUSwfiq1EXeotEX+s KwI7StOLo+W9jFjwULYcyIzHhEuyKbsqWDicJlztqv/o7mq2lMHLvLpvQLafItYJU/ Gt3m6HcoBLAS2S2syrX5QUuX5JJ5M90XNdTVgzGo= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Frank Li , Sasha Levin Subject: [PATCH 5.19 0608/1157] usb: cdns3: fix random warning message when driver load Date: Mon, 15 Aug 2022 19:59:24 +0200 Message-Id: <20220815180503.984655166@linuxfoundation.org> X-Mailer: git-send-email 2.37.2 In-Reply-To: <20220815180439.416659447@linuxfoundation.org> References: <20220815180439.416659447@linuxfoundation.org> User-Agent: quilt/0.67 MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" From: Frank Li [ Upstream commit 8659ab3d936fcf0084676f98b75b317017aa8f82 ] Warning log: [ 4.141392] Unexpected gfp: 0x4 (GFP_DMA32). Fixing up to gfp: 0xa20 (GF= P_ATOMIC). Fix your code! [ 4.150340] CPU: 1 PID: 175 Comm: 1-0050 Not tainted 5.15.5-00039-g2fd9a= e1b568c #20 [ 4.158010] Hardware name: Freescale i.MX8QXP MEK (DT) [ 4.163155] Call trace: [ 4.165600] dump_backtrace+0x0/0x1b0 [ 4.169286] show_stack+0x18/0x68 [ 4.172611] dump_stack_lvl+0x68/0x84 [ 4.176286] dump_stack+0x18/0x34 [ 4.179613] kmalloc_fix_flags+0x60/0x88 [ 4.183550] new_slab+0x334/0x370 [ 4.186878] ___slab_alloc.part.108+0x4d4/0x748 [ 4.191419] __slab_alloc.isra.109+0x30/0x78 [ 4.195702] kmem_cache_alloc+0x40c/0x420 [ 4.199725] dma_pool_alloc+0xac/0x1f8 [ 4.203486] cdns3_allocate_trb_pool+0xb4/0xd0 pool_alloc_page(struct dma_pool *pool, gfp_t mem_flags) { ... page =3D kmalloc(sizeof(*page), mem_flags); page->vaddr =3D dma_alloc_coherent(pool->dev, pool->allocation, &page->dma, mem_flags); ... } kmalloc was called with mem_flags, which is passed down in cdns3_allocate_trb_pool() and have GFP_DMA32 flags. kmall_fix_flags() report warning. GFP_DMA32 is not useful at all. dma_alloc_coherent() will handle DMA memory region correctly by pool->dev. GFP_DMA32 can be removed safely. Signed-off-by: Frank Li Link: https://lore.kernel.org/r/20220609154456.2871672-1-Frank.Li@nxp.com Signed-off-by: Greg Kroah-Hartman Signed-off-by: Sasha Levin --- drivers/usb/cdns3/cdns3-gadget.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/usb/cdns3/cdns3-gadget.c b/drivers/usb/cdns3/cdns3-gad= get.c index 5c15c48952a6..f5f5fbbefec0 100644 --- a/drivers/usb/cdns3/cdns3-gadget.c +++ b/drivers/usb/cdns3/cdns3-gadget.c @@ -220,7 +220,7 @@ int cdns3_allocate_trb_pool(struct cdns3_endpoint *priv= _ep) =20 if (!priv_ep->trb_pool) { priv_ep->trb_pool =3D dma_pool_alloc(priv_dev->eps_dma_pool, - GFP_DMA32 | GFP_ATOMIC, + GFP_ATOMIC, &priv_ep->trb_pool_dma); =20 if (!priv_ep->trb_pool) --=20 2.35.1