From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751713AbbJHALL (ORCPT ); Wed, 7 Oct 2015 20:11:11 -0400 Received: from e23smtp09.au.ibm.com ([202.81.31.142]:44486 "EHLO e23smtp09.au.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751574AbbJHALJ (ORCPT ); Wed, 7 Oct 2015 20:11:09 -0400 X-Helo: d23dlp03.au.ibm.com X-MailFrom: honclo@linux.vnet.ibm.com X-RcptTo: linux-kernel@vger.kernel.org From: "Hon Ching(Vicky) Lo" To: lo1@us.ibm.com Cc: linux-kernel@vger.kernel.org, "Hon Ching(Vicky) Lo" Subject: [PATCH] vTPM: fix memory allocation flag for rtce buffer at kernel boot Date: Wed, 7 Oct 2015 20:10:02 -0400 Message-Id: <1444263005-14775-1-git-send-email-honclo@linux.vnet.ibm.com> X-Mailer: git-send-email 1.7.1 X-TM-AS-MML: disable X-Content-Scanned: Fidelis XPS MAILER x-cbid: 15100800-0033-0000-0000-00000238656B Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org At ibm vtpm initialzation, tpm_ibmvtpm_probe() registers its interrupt handler, ibmvtpm_interrupt, which calls ibmvtpm_crq_process to allocate memory for rtce buffer. The current code uses 'GFP_KERNEL' as the type of kernel memory allocation, which resulted a warning at kernel/lockdep.c. This patch uses 'GFP_ATOMIC' instead so that the allocation is high-priority and does not sleep. Signed-off-by: Hon Ching(Vicky) Lo --- drivers/char/tpm/tpm_ibmvtpm.c | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-) diff --git a/drivers/char/tpm/tpm_ibmvtpm.c b/drivers/char/tpm/tpm_ibmvtpm.c index 27ebf95..3e6a226 100644 --- a/drivers/char/tpm/tpm_ibmvtpm.c +++ b/drivers/char/tpm/tpm_ibmvtpm.c @@ -491,7 +491,7 @@ static void ibmvtpm_crq_process(struct ibmvtpm_crq *crq, } ibmvtpm->rtce_size = be16_to_cpu(crq->len); ibmvtpm->rtce_buf = kmalloc(ibmvtpm->rtce_size, - GFP_KERNEL); + GFP_ATOMIC); if (!ibmvtpm->rtce_buf) { dev_err(ibmvtpm->dev, "Failed to allocate memory for rtce buffer\n"); return; -- 1.7.1