diff options
| -rw-r--r-- | drivers/iommu/irq_remapping.c | 12 | ||||
| -rw-r--r-- | drivers/pci/msi.c | 10 | ||||
| -rw-r--r-- | include/linux/msi.h | 1 |
3 files changed, 16 insertions, 7 deletions
diff --git a/drivers/iommu/irq_remapping.c b/drivers/iommu/irq_remapping.c index dcfea4e..39f81ae 100644 --- a/drivers/iommu/irq_remapping.c +++ b/drivers/iommu/irq_remapping.c @@ -51,26 +51,27 @@ static void irq_remapping_disable_io_apic(void) static int do_setup_msi_irqs(struct pci_dev *dev, int nvec) { - int node, ret, sub_handle, index = 0; + int node, ret, sub_handle, nvec_pow2, index = 0; unsigned int irq; struct msi_desc *msidesc; - nvec = __roundup_pow_of_two(nvec); - WARN_ON(!list_is_singular(&dev->msi_list)); msidesc = list_entry(dev->msi_list.next, struct msi_desc, list); WARN_ON(msidesc->irq); WARN_ON(msidesc->msi_attrib.multiple); + WARN_ON(msidesc->nvec_used); node = dev_to_node(&dev->dev); irq = __create_irqs(get_nr_irqs_gsi(), nvec, node); if (irq == 0) return -ENOSPC; - msidesc->msi_attrib.multiple = ilog2(nvec); + nvec_pow2 = __roundup_pow_of_two(nvec); + msidesc->nvec_used = nvec; + msidesc->msi_attrib.multiple = ilog2(nvec_pow2); for (sub_handle = 0; sub_handle < nvec; sub_handle++) { if (!sub_handle) { - index = msi_alloc_remapped_irq(dev, irq, nvec); + index = msi_alloc_remapped_irq(dev, irq, nvec_pow2); if (index < 0) { ret = index; goto error; @@ -95,6 +96,7 @@ error: * IRQs from tearing down again in default_teardown_msi_irqs() */ msidesc->irq = 0; + msidesc->nvec_used = 0; msidesc->msi_attrib.multiple = 0; return ret; diff --git a/drivers/pci/msi.c b/drivers/pci/msi.c index 2c10752..aca7578 100644 --- a/drivers/pci/msi.c +++ b/drivers/pci/msi.c @@ -81,7 +81,10 @@ void default_teardown_msi_irqs(struct pci_dev *dev) int i, nvec; if (entry->irq == 0) continue; - nvec = 1 << entry->msi_attrib.multiple; + if (entry->nvec_used) + nvec = entry->nvec_used; + else + nvec = 1 << entry->msi_attrib.multiple; for (i = 0; i < nvec; i++) arch_teardown_msi_irq(entry->irq + i); } @@ -336,7 +339,10 @@ static void free_msi_irqs(struct pci_dev *dev) int i, nvec; if (!entry->irq) continue; - nvec = 1 << entry->msi_attrib.multiple; + if (entry->nvec_used) + nvec = entry->nvec_used; + else + nvec = 1 << entry->msi_attrib.multiple; #ifdef CONFIG_GENERIC_HARDIRQS for (i = 0; i < nvec; i++) BUG_ON(irq_has_action(entry->irq + i)); diff --git a/include/linux/msi.h b/include/linux/msi.h index 20c2d6d..ee66f3a 100644 --- a/include/linux/msi.h +++ b/include/linux/msi.h @@ -35,6 +35,7 @@ struct msi_desc { u32 masked; /* mask bits */ unsigned int irq; + unsigned int nvec_used; /* number of messages */ struct list_head list; union { |
