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| From | Keith Busch <keith.busch@intel.com> |
| Newsgroups | linux.kernel |
| Subject | [PATCHv5 1/6] msi: Relax msi_domain_alloc() to support parentless MSI irqdomains |
| Date | Fri, 13 Nov 2015 18:20:04 +0100 |
| Message-ID | <quqb2-Rg-35@gated-at.bofh.it> (permalink) |
| References | <quqb0-Rg-3@gated-at.bofh.it> |
| X-Original-To | LKML <linux-kernel@vger.kernel.org>, x86@kernel.org, linux-pci@vger.kernel.org |
| X-Extloop1 | 1 |
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| Sender | robomod@news.nic.it |
| List-ID | <linux-kernel.vger.kernel.org> |
| X-Mailing-List | linux-kernel@vger.kernel.org |
| Approved | robomod@news.nic.it |
| Lines | 39 |
| Organization | linux.* mail to news gateway |
| X-Original-Cc | Jiang Liu <jiang.liu@linux.intel.com>, Thomas Gleixner <tglx@linutronix.de>, Dan Williams <dan.j.williams@intel.com>, Bjorn Helgaas <bhelgaas@google.com>, Bryan Veal <bryan.e.veal@intel.com>, Ingo Molnar <mingo@redhat.com>, "H. Peter Anvin" <hpa@zytor.com>, Martin Mares <mj@ucw.cz>, Jon Derrick <jonathan.derrick@intel.com> |
| X-Original-Date | Fri, 13 Nov 2015 10:17:32 -0700 |
| X-Original-Message-ID | <1447435057-5212-2-git-send-email-keith.busch@intel.com> |
| X-Original-References | <1447435057-5212-1-git-send-email-keith.busch@intel.com> |
| X-Original-Sender | linux-kernel-owner@vger.kernel.org |
| Xref | csiph.com linux.kernel:1269109 |
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From: Liu Jiang <jiang.liu@linux.intel.com>
Previously msi_domain_alloc() assumes MSI irqdomains always have parent
irqdomains, but that's not true for the new Intel VMD devices. So relax
msi_domain_alloc() to support parentless MSI irqdomains.
Signed-off-by: Jiang Liu <jiang.liu@linux.intel.com>
Tested-by: Keith Busch <keith.busch@intel.com>
---
kernel/irq/msi.c | 8 +++++---
1 file changed, 5 insertions(+), 3 deletions(-)
diff --git a/kernel/irq/msi.c b/kernel/irq/msi.c
index 6b0c0b7..5e15cb4 100644
--- a/kernel/irq/msi.c
+++ b/kernel/irq/msi.c
@@ -109,9 +109,11 @@ static int msi_domain_alloc(struct irq_domain *domain, unsigned int virq,
if (irq_find_mapping(domain, hwirq) > 0)
return -EEXIST;
- ret = irq_domain_alloc_irqs_parent(domain, virq, nr_irqs, arg);
- if (ret < 0)
- return ret;
+ if (domain->parent) {
+ ret = irq_domain_alloc_irqs_parent(domain, virq, nr_irqs, arg);
+ if (ret < 0)
+ return ret;
+ }
for (i = 0; i < nr_irqs; i++) {
ret = ops->msi_init(domain, info, virq + i, hwirq + i, arg);
--
2.6.2.307.g37023ba
--
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[PATCHv5 0/6] Driver for new VMD device Keith Busch <keith.busch@intel.com> - 2015-11-13 18:20 +0100
[PATCHv5 2/6] pci: skip child bus with conflicting resources Keith Busch <keith.busch@intel.com> - 2015-11-13 18:20 +0100
[PATCHv5 6/6] pciutils: Allow 32-bit domains Keith Busch <keith.busch@intel.com> - 2015-11-13 18:20 +0100
[PATCHv5 5/6] x86/pci: Initial commit for new VMD device driver Keith Busch <keith.busch@intel.com> - 2015-11-13 18:20 +0100
Re: [PATCHv5 5/6] x86/pci: Initial commit for new VMD device driver Thomas Gleixner <tglx@linutronix.de> - 2015-11-13 22:30 +0100
Re: [PATCHv5 5/6] x86/pci: Initial commit for new VMD device driver Keith Busch <keith.busch@intel.com> - 2015-11-13 22:50 +0100
[PATCHv5 4/6] x86-pci: allow pci domain specific dma ops Keith Busch <keith.busch@intel.com> - 2015-11-13 18:20 +0100
[PATCHv5 1/6] msi: Relax msi_domain_alloc() to support parentless MSI irqdomains Keith Busch <keith.busch@intel.com> - 2015-11-13 18:20 +0100
Re: [PATCHv5 1/6] msi: Relax msi_domain_alloc() to support parentless MSI irqdomains Thomas Gleixner <tglx@linutronix.de> - 2015-11-13 22:30 +0100
Re: [PATCHv5 0/6] Driver for new VMD device Thomas Gleixner <tglx@linutronix.de> - 2015-11-13 22:30 +0100
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