From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-eopbgr710124.outbound.protection.outlook.com ([40.107.71.124]:62784 "EHLO NAM05-BY2-obe.outbound.protection.outlook.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1728249AbeIQIZ3 (ORCPT ); Mon, 17 Sep 2018 04:25:29 -0400 From: Sasha Levin To: "stable@vger.kernel.org" , "linux-kernel@vger.kernel.org" CC: Wei Yongjun , Greg Kroah-Hartman , Sasha Levin Subject: [PATCH AUTOSEL 4.18 004/136] misc: ibmvmc: Use GFP_ATOMIC under spin lock Date: Mon, 17 Sep 2018 03:00:13 +0000 Message-ID: <20180917030006.245495-4-alexander.levin@microsoft.com> References: <20180917030006.245495-1-alexander.levin@microsoft.com> In-Reply-To: <20180917030006.245495-1-alexander.levin@microsoft.com> Content-Language: en-US Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Sender: stable-owner@vger.kernel.org List-ID: From: Wei Yongjun [ Upstream commit 97b715b62e5b4c6edb75d023f556fd09a46cb4e1 ] The function alloc_dma_buffer() is called from ibmvmc_add_buffer(), in which a spin lock be held here, so we should use GFP_ATOMIC when a lock is held. Fixes: 0eca353e7ae7 ("misc: IBM Virtual Management Channel Driver (VMC)") Signed-off-by: Wei Yongjun Reviewed-by: Bryant G. Ly Signed-off-by: Greg Kroah-Hartman Signed-off-by: Sasha Levin --- drivers/misc/ibmvmc.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/misc/ibmvmc.c b/drivers/misc/ibmvmc.c index fb83d1375638..8f82bb9d11e2 100644 --- a/drivers/misc/ibmvmc.c +++ b/drivers/misc/ibmvmc.c @@ -273,7 +273,7 @@ static void *alloc_dma_buffer(struct vio_dev *vdev, siz= e_t size, dma_addr_t *dma_handle) { /* allocate memory */ - void *buffer =3D kzalloc(size, GFP_KERNEL); + void *buffer =3D kzalloc(size, GFP_ATOMIC); =20 if (!buffer) { *dma_handle =3D 0; --=20 2.17.1