From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.linuxfoundation.org ([140.211.169.12]:60072 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727881AbeJBUKW (ORCPT ); Tue, 2 Oct 2018 16:10:22 -0400 From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Wei Yongjun , "Bryant G. Ly" , Sasha Levin Subject: [PATCH 4.18 004/228] misc: ibmvmc: Use GFP_ATOMIC under spin lock Date: Tue, 2 Oct 2018 06:21:41 -0700 Message-Id: <20181002132459.328218551@linuxfoundation.org> In-Reply-To: <20181002132459.032960735@linuxfoundation.org> References: <20181002132459.032960735@linuxfoundation.org> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org List-ID: 4.18-stable review patch. If anyone has any objections, please let me know. ------------------ 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 Signed-off-by: Greg Kroah-Hartman --- drivers/misc/ibmvmc.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/drivers/misc/ibmvmc.c +++ b/drivers/misc/ibmvmc.c @@ -273,7 +273,7 @@ static void *alloc_dma_buffer(struct vio dma_addr_t *dma_handle) { /* allocate memory */ - void *buffer = kzalloc(size, GFP_KERNEL); + void *buffer = kzalloc(size, GFP_ATOMIC); if (!buffer) { *dma_handle = 0;