From: Dan Carpenter <dan.carpenter@oracle.com> To: Maya Nakamura <m.maya.nakamura@gmail.com> Cc: lorenzo.pieralisi@arm.com, bhelgaas@google.com, linux-pci@vger.kernel.org, kys@microsoft.com, sthemmin@microsoft.com, olaf@aepfle.de, apw@canonical.com, jasowang@redhat.com, mikelley@microsoft.com, Alexander.Levin@microsoft.com, marcelo.cerri@canonical.com, vkuznets@redhat.com, haiyangz@microsoft.com, driverdev-devel@linuxdriverproject.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH 2/2] PCI: hv: Refactor hv_irq_unmask() to use cpumask_to_vpset() Date: Thu, 24 Jan 2019 15:29:18 +0300 [thread overview] Message-ID: <20190124122918.GL4482@kadam> (raw) In-Reply-To: <885d207cd90a558364d611e4ebd64a87aa8962d7.1548232616.git.m.maya.nakamura@gmail.com> On Wed, Jan 23, 2019 at 01:02:12PM -0800, Maya Nakamura wrote: > @@ -908,12 +906,12 @@ static void hv_irq_unmask(struct irq_data *data) > struct retarget_msi_interrupt *params; > struct hv_pcibus_device *hbus; > struct cpumask *dest; > + cpumask_var_t tmp; > struct pci_bus *pbus; > struct pci_dev *pdev; > unsigned long flags; > u32 var_size = 0; > - int cpu_vmbus; > - int cpu; > + int cpu, nr_bank = 0; ^^^^^ No need to initialize this to a bogus value. It's misleading and it turns off GCC's uninitialized variable warning so it can lead to bugs. > u64 res; > > dest = irq_data_get_effective_affinity_mask(data); > @@ -953,29 +951,28 @@ static void hv_irq_unmask(struct irq_data *data) > */ > params->int_target.flags |= > HV_DEVICE_INTERRUPT_TARGET_PROCESSOR_SET; > - params->int_target.vp_set.valid_bank_mask = > - (1ull << HV_VP_SET_BANK_COUNT_MAX) - 1; > + > + if (!alloc_cpumask_var(&tmp, GFP_KERNEL)) { > + dev_err(&hbus->hdev->device, "out of memory"); No need for this error message. alloc_cpumask_var() already has better debug messages built in. > + return; We can't return directly. We need to unlock first. > + } > + > + cpumask_and(tmp, dest, cpu_online_mask); > + nr_bank = cpumask_to_vpset(¶ms->int_target.vp_set, tmp); > + free_cpumask_var(tmp); > + > + if (!nr_bank) { > + dev_err(&hbus->hdev->device, "too high CPU"); This error message is not useful. > + res = 1; > + goto exit_unlock; > + } regards, dan carpenter
WARNING: multiple messages have this Message-ID (diff)
From: Dan Carpenter <dan.carpenter@oracle.com> To: Maya Nakamura <m.maya.nakamura@gmail.com> Cc: olaf@aepfle.de, lorenzo.pieralisi@arm.com, sthemmin@microsoft.com, linux-pci@vger.kernel.org, jasowang@redhat.com, driverdev-devel@linuxdriverproject.org, linux-kernel@vger.kernel.org, mikelley@microsoft.com, Alexander.Levin@microsoft.com, apw@canonical.com, marcelo.cerri@canonical.com, bhelgaas@google.com, vkuznets@redhat.com, haiyangz@microsoft.com Subject: Re: [PATCH 2/2] PCI: hv: Refactor hv_irq_unmask() to use cpumask_to_vpset() Date: Thu, 24 Jan 2019 15:29:18 +0300 [thread overview] Message-ID: <20190124122918.GL4482@kadam> (raw) In-Reply-To: <885d207cd90a558364d611e4ebd64a87aa8962d7.1548232616.git.m.maya.nakamura@gmail.com> On Wed, Jan 23, 2019 at 01:02:12PM -0800, Maya Nakamura wrote: > @@ -908,12 +906,12 @@ static void hv_irq_unmask(struct irq_data *data) > struct retarget_msi_interrupt *params; > struct hv_pcibus_device *hbus; > struct cpumask *dest; > + cpumask_var_t tmp; > struct pci_bus *pbus; > struct pci_dev *pdev; > unsigned long flags; > u32 var_size = 0; > - int cpu_vmbus; > - int cpu; > + int cpu, nr_bank = 0; ^^^^^ No need to initialize this to a bogus value. It's misleading and it turns off GCC's uninitialized variable warning so it can lead to bugs. > u64 res; > > dest = irq_data_get_effective_affinity_mask(data); > @@ -953,29 +951,28 @@ static void hv_irq_unmask(struct irq_data *data) > */ > params->int_target.flags |= > HV_DEVICE_INTERRUPT_TARGET_PROCESSOR_SET; > - params->int_target.vp_set.valid_bank_mask = > - (1ull << HV_VP_SET_BANK_COUNT_MAX) - 1; > + > + if (!alloc_cpumask_var(&tmp, GFP_KERNEL)) { > + dev_err(&hbus->hdev->device, "out of memory"); No need for this error message. alloc_cpumask_var() already has better debug messages built in. > + return; We can't return directly. We need to unlock first. > + } > + > + cpumask_and(tmp, dest, cpu_online_mask); > + nr_bank = cpumask_to_vpset(¶ms->int_target.vp_set, tmp); > + free_cpumask_var(tmp); > + > + if (!nr_bank) { > + dev_err(&hbus->hdev->device, "too high CPU"); This error message is not useful. > + res = 1; > + goto exit_unlock; > + } regards, dan carpenter _______________________________________________ devel mailing list devel@linuxdriverproject.org http://driverdev.linuxdriverproject.org/mailman/listinfo/driverdev-devel
next prev parent reply other threads:[~2019-01-24 12:30 UTC|newest] Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top 2019-01-23 20:58 [PATCH 0/2] PCI: hv: Refactor hv_irq_unmask() to use hv_vpset and cpumask_to_vpset() Maya Nakamura 2019-01-23 20:58 ` Maya Nakamura 2019-01-23 21:00 ` [PATCH 1/2] PCI: hv: Replace hv_vp_set with hv_vpset Maya Nakamura 2019-01-23 21:00 ` Maya Nakamura 2019-01-24 13:12 ` Vitaly Kuznetsov 2019-01-24 13:12 ` Vitaly Kuznetsov 2019-01-26 0:32 ` Maya Nakamura 2019-01-26 0:32 ` Maya Nakamura 2019-01-23 21:02 ` [PATCH 2/2] PCI: hv: Refactor hv_irq_unmask() to use cpumask_to_vpset() Maya Nakamura 2019-01-23 21:02 ` Maya Nakamura 2019-01-24 12:29 ` Dan Carpenter [this message] 2019-01-24 12:29 ` Dan Carpenter 2019-01-26 0:22 ` Maya Nakamura 2019-01-26 0:22 ` Maya Nakamura
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