From mboxrd@z Thu Jan 1 00:00:00 1970 From: tip-bot for Thomas Gleixner Date: Wed, 12 Mar 2014 12:15:26 +0000 Subject: [tip:irq/core] ia64: Validate online cpus in irq_set_affinity() callbacks Message-Id: List-Id: References: <20140304203100.650414633@linutronix.de> In-Reply-To: <20140304203100.650414633@linutronix.de> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: linux-tip-commits@vger.kernel.org Cc: linux-kernel@vger.kernel.org, hpa@zytor.com, mingo@kernel.org, peterz@infradead.org, tony.luck@intel.com, linux-ia64@vger.kernel.org, fenghua.yu@intel.com, tglx@linutronix.de Commit-ID: 785aebd0cfff52e735ad4fd188d3726b5affc8e5 Gitweb: http://git.kernel.org/tip/785aebd0cfff52e735ad4fd188d3726b5affc8e5 Author: Thomas Gleixner AuthorDate: Tue, 4 Mar 2014 20:43:38 +0000 Committer: Thomas Gleixner CommitDate: Wed, 12 Mar 2014 13:07:40 +0100 ia64: Validate online cpus in irq_set_affinity() callbacks The [user space] interface does not filter out offline cpus. It merily guarantees that the mask contains at least one online cpu. So the selector in the irq chip implementation needs to make sure to pick only an online cpu because otherwise: Offline Core 1 Set affinity to 0xe (is valid due to online mask 0xd) cpumask_first will pick core 1, which is offline Signed-off-by: Thomas Gleixner Cc: Peter Zijlstra Cc: Tony Luck Cc: Fenghua Yu Cc: ia64 Link: http://lkml.kernel.org/r/20140304203100.650414633@linutronix.de Signed-off-by: Thomas Gleixner --- arch/ia64/kernel/msi_ia64.c | 10 ++-------- arch/ia64/sn/kernel/irq.c | 4 ++-- arch/ia64/sn/kernel/msi_sn.c | 2 +- 3 files changed, 5 insertions(+), 11 deletions(-) diff --git a/arch/ia64/kernel/msi_ia64.c b/arch/ia64/kernel/msi_ia64.c index fb2f1e6..c430f91 100644 --- a/arch/ia64/kernel/msi_ia64.c +++ b/arch/ia64/kernel/msi_ia64.c @@ -17,12 +17,9 @@ static int ia64_set_msi_irq_affinity(struct irq_data *idata, { struct msi_msg msg; u32 addr, data; - int cpu = first_cpu(*cpu_mask); + int cpu = cpumask_first_and(cpu_mask, cpu_online_mask); unsigned int irq = idata->irq; - if (!cpu_online(cpu)) - return -1; - if (irq_prepare_move(irq, cpu)) return -1; @@ -139,10 +136,7 @@ static int dmar_msi_set_affinity(struct irq_data *data, unsigned int irq = data->irq; struct irq_cfg *cfg = irq_cfg + irq; struct msi_msg msg; - int cpu = cpumask_first(mask); - - if (!cpu_online(cpu)) - return -1; + int cpu = cpumask_first_and(mask, cpu_online_mask); if (irq_prepare_move(irq, cpu)) return -1; diff --git a/arch/ia64/sn/kernel/irq.c b/arch/ia64/sn/kernel/irq.c index 62cf4dd..85d0951 100644 --- a/arch/ia64/sn/kernel/irq.c +++ b/arch/ia64/sn/kernel/irq.c @@ -209,8 +209,8 @@ static int sn_set_affinity_irq(struct irq_data *data, nasid_t nasid; int slice; - nasid = cpuid_to_nasid(cpumask_first(mask)); - slice = cpuid_to_slice(cpumask_first(mask)); + nasid = cpuid_to_nasid(cpumask_first_and(mask, cpu_online_mask)); + slice = cpuid_to_slice(cpumask_first_and(mask, cpu_online_mask)); list_for_each_entry_safe(sn_irq_info, sn_irq_info_safe, sn_irq_lh[irq], list) diff --git a/arch/ia64/sn/kernel/msi_sn.c b/arch/ia64/sn/kernel/msi_sn.c index 2b98b9e..afc58d2 100644 --- a/arch/ia64/sn/kernel/msi_sn.c +++ b/arch/ia64/sn/kernel/msi_sn.c @@ -166,7 +166,7 @@ static int sn_set_msi_irq_affinity(struct irq_data *data, struct sn_pcibus_provider *provider; unsigned int cpu, irq = data->irq; - cpu = cpumask_first(cpu_mask); + cpu = cpumask_first_and(cpu_mask, cpu_online_mask); sn_irq_info = sn_msi_info[irq].sn_irq_info; if (sn_irq_info = NULL || sn_irq_info->irq_int_bit >= 0) return -1; From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752846AbaCLMQH (ORCPT ); Wed, 12 Mar 2014 08:16:07 -0400 Received: from terminus.zytor.com ([198.137.202.10]:50311 "EHLO terminus.zytor.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751025AbaCLMQE (ORCPT ); Wed, 12 Mar 2014 08:16:04 -0400 Date: Wed, 12 Mar 2014 05:15:26 -0700 From: tip-bot for Thomas Gleixner Message-ID: Cc: linux-kernel@vger.kernel.org, hpa@zytor.com, mingo@kernel.org, peterz@infradead.org, tony.luck@intel.com, linux-ia64@vger.kernel.org, fenghua.yu@intel.com, tglx@linutronix.de Reply-To: mingo@kernel.org, hpa@zytor.com, linux-kernel@vger.kernel.org, peterz@infradead.org, tony.luck@intel.com, linux-ia64@vger.kernel.org, fenghua.yu@intel.com, tglx@linutronix.de In-Reply-To: <20140304203100.650414633@linutronix.de> References: <20140304203100.650414633@linutronix.de> To: linux-tip-commits@vger.kernel.org Subject: [tip:irq/core] ia64: Validate online cpus in irq_set_affinity() callbacks Git-Commit-ID: 785aebd0cfff52e735ad4fd188d3726b5affc8e5 X-Mailer: tip-git-log-daemon Robot-ID: Robot-Unsubscribe: Contact to get blacklisted from these emails MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain; charset=UTF-8 Content-Disposition: inline Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Commit-ID: 785aebd0cfff52e735ad4fd188d3726b5affc8e5 Gitweb: http://git.kernel.org/tip/785aebd0cfff52e735ad4fd188d3726b5affc8e5 Author: Thomas Gleixner AuthorDate: Tue, 4 Mar 2014 20:43:38 +0000 Committer: Thomas Gleixner CommitDate: Wed, 12 Mar 2014 13:07:40 +0100 ia64: Validate online cpus in irq_set_affinity() callbacks The [user space] interface does not filter out offline cpus. It merily guarantees that the mask contains at least one online cpu. So the selector in the irq chip implementation needs to make sure to pick only an online cpu because otherwise: Offline Core 1 Set affinity to 0xe (is valid due to online mask 0xd) cpumask_first will pick core 1, which is offline Signed-off-by: Thomas Gleixner Cc: Peter Zijlstra Cc: Tony Luck Cc: Fenghua Yu Cc: ia64 Link: http://lkml.kernel.org/r/20140304203100.650414633@linutronix.de Signed-off-by: Thomas Gleixner --- arch/ia64/kernel/msi_ia64.c | 10 ++-------- arch/ia64/sn/kernel/irq.c | 4 ++-- arch/ia64/sn/kernel/msi_sn.c | 2 +- 3 files changed, 5 insertions(+), 11 deletions(-) diff --git a/arch/ia64/kernel/msi_ia64.c b/arch/ia64/kernel/msi_ia64.c index fb2f1e6..c430f91 100644 --- a/arch/ia64/kernel/msi_ia64.c +++ b/arch/ia64/kernel/msi_ia64.c @@ -17,12 +17,9 @@ static int ia64_set_msi_irq_affinity(struct irq_data *idata, { struct msi_msg msg; u32 addr, data; - int cpu = first_cpu(*cpu_mask); + int cpu = cpumask_first_and(cpu_mask, cpu_online_mask); unsigned int irq = idata->irq; - if (!cpu_online(cpu)) - return -1; - if (irq_prepare_move(irq, cpu)) return -1; @@ -139,10 +136,7 @@ static int dmar_msi_set_affinity(struct irq_data *data, unsigned int irq = data->irq; struct irq_cfg *cfg = irq_cfg + irq; struct msi_msg msg; - int cpu = cpumask_first(mask); - - if (!cpu_online(cpu)) - return -1; + int cpu = cpumask_first_and(mask, cpu_online_mask); if (irq_prepare_move(irq, cpu)) return -1; diff --git a/arch/ia64/sn/kernel/irq.c b/arch/ia64/sn/kernel/irq.c index 62cf4dd..85d0951 100644 --- a/arch/ia64/sn/kernel/irq.c +++ b/arch/ia64/sn/kernel/irq.c @@ -209,8 +209,8 @@ static int sn_set_affinity_irq(struct irq_data *data, nasid_t nasid; int slice; - nasid = cpuid_to_nasid(cpumask_first(mask)); - slice = cpuid_to_slice(cpumask_first(mask)); + nasid = cpuid_to_nasid(cpumask_first_and(mask, cpu_online_mask)); + slice = cpuid_to_slice(cpumask_first_and(mask, cpu_online_mask)); list_for_each_entry_safe(sn_irq_info, sn_irq_info_safe, sn_irq_lh[irq], list) diff --git a/arch/ia64/sn/kernel/msi_sn.c b/arch/ia64/sn/kernel/msi_sn.c index 2b98b9e..afc58d2 100644 --- a/arch/ia64/sn/kernel/msi_sn.c +++ b/arch/ia64/sn/kernel/msi_sn.c @@ -166,7 +166,7 @@ static int sn_set_msi_irq_affinity(struct irq_data *data, struct sn_pcibus_provider *provider; unsigned int cpu, irq = data->irq; - cpu = cpumask_first(cpu_mask); + cpu = cpumask_first_and(cpu_mask, cpu_online_mask); sn_irq_info = sn_msi_info[irq].sn_irq_info; if (sn_irq_info == NULL || sn_irq_info->irq_int_bit >= 0) return -1;