Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1759696AbcDJS65 (ORCPT ); Sun, 10 Apr 2016 14:58:57 -0400 Received: from mail.linuxfoundation.org ([140.211.169.12]:53245 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1759192AbcDJS6s (ORCPT ); Sun, 10 Apr 2016 14:58:48 -0400 From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Raghava Aditya Renukunta , Shane Seymour , Johannes Thumshirn , "Martin K. Petersen" Subject: [PATCH 4.4 041/210] aacraid: Set correct msix count for EEH recovery Date: Sun, 10 Apr 2016 11:34:22 -0700 Message-Id: <20160410183528.122158382@linuxfoundation.org> X-Mailer: git-send-email 2.8.0 In-Reply-To: <20160410183526.651820045@linuxfoundation.org> References: <20160410183526.651820045@linuxfoundation.org> User-Agent: quilt/0.64 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1737 Lines: 51 4.4-stable review patch. If anyone has any objections, please let me know. ------------------ From: Raghava Aditya Renukunta commit ecc479e00db8eb110b200afe1effcb3df20ca7ae upstream. During EEH recovery number of online CPU's might change thereby changing the number of MSIx vectors. Since each fib is allocated to a vector, changes in the number of vectors causes fib to be sent thru invalid vectors.In addition the correct number of MSIx vectors is not updated in the INIT struct sent to the controller, when it is reinitialized. Fixed by reassigning vectors to fibs based on the updated number of MSIx vectors and updating the INIT structure before sending to controller. Fixes: MSI-X vector calculation for suspend/resume Signed-off-by: Raghava Aditya Renukunta Reviewed-by: Shane Seymour Reviewed-by: Johannes Thumshirn Signed-off-by: Martin K. Petersen Signed-off-by: Greg Kroah-Hartman --- drivers/scsi/aacraid/linit.c | 12 +++++++++++- 1 file changed, 11 insertions(+), 1 deletion(-) --- a/drivers/scsi/aacraid/linit.c +++ b/drivers/scsi/aacraid/linit.c @@ -1404,8 +1404,18 @@ static int aac_acquire_resources(struct aac_adapter_enable_int(dev); - if (!dev->sync_mode) + /*max msix may change after EEH + * Re-assign vectors to fibs + */ + aac_fib_vector_assign(dev); + + if (!dev->sync_mode) { + /* After EEH recovery or suspend resume, max_msix count + * may change, therfore updating in init as well. + */ aac_adapter_start(dev); + dev->init->Sa_MSIXVectors = cpu_to_le32(dev->max_msix); + } return 0; error_iounmap: