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author | Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> | 2011-07-06 15:15:23 -0400 |
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committer | Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> | 2011-07-11 13:19:33 -0400 |
commit | 78316ada2222b5e3abc043eea7644e12319042d6 (patch) | |
tree | 92220adf3b6fbcf4d49a7f7933838e9e6464f245 /arch | |
parent | 34b1d1269d9fdaa1558e3014c3cc03ac0967de95 (diff) | |
download | linux-3.10-78316ada2222b5e3abc043eea7644e12319042d6.tar.gz linux-3.10-78316ada2222b5e3abc043eea7644e12319042d6.tar.bz2 linux-3.10-78316ada2222b5e3abc043eea7644e12319042d6.zip |
xen/pci: Remove 'xen_allocate_pirq_gsi'.
In the past (2.6.38) the 'xen_allocate_pirq_gsi' would allocate
an entry in a Linux IRQ -> {XEN_IRQ, type, event, ..} array. All
of that has been removed in 2.6.39 and the Xen IRQ subsystem uses
an linked list that is populated when the call to
'xen_allocate_irq_gsi' (universally done from any of the xen_bind_*
calls) is done. The 'xen_allocate_pirq_gsi' is a NOP and there is
no need for it anymore so lets remove it.
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Diffstat (limited to 'arch')
-rw-r--r-- | arch/x86/pci/xen.c | 37 |
1 files changed, 12 insertions, 25 deletions
diff --git a/arch/x86/pci/xen.c b/arch/x86/pci/xen.c index 6eddc524603..f07c419a616 100644 --- a/arch/x86/pci/xen.c +++ b/arch/x86/pci/xen.c @@ -37,14 +37,8 @@ static int xen_pcifront_enable_irq(struct pci_dev *dev) rc); return rc; } - - rc = xen_allocate_pirq_gsi(gsi); - if (rc < 0) { - dev_warn(&dev->dev, "Xen PCI: failed to allocate a PIRQ for GSI%d: %d\n", - gsi, rc); - return rc; - } - pirq = rc; + /* In PV DomU the Xen PCI backend puts the PIRQ in the interrupt line.*/ + pirq = gsi; if (gsi < NR_IRQS_LEGACY) share = 0; @@ -63,18 +57,16 @@ static int xen_pcifront_enable_irq(struct pci_dev *dev) #ifdef CONFIG_ACPI static int xen_register_pirq(u32 gsi, int gsi_override, int triggering, - bool alloc_pirq) + bool set_pirq) { int rc, pirq = -1, irq = -1; struct physdev_map_pirq map_irq; int shareable = 0; char *name; - if (alloc_pirq) { - pirq = xen_allocate_pirq_gsi(gsi); - if (pirq < 0) - goto out; - } + if (set_pirq) + pirq = gsi; + map_irq.domid = DOMID_SELF; map_irq.type = MAP_PIRQ_TYPE_GSI; map_irq.index = gsi; @@ -112,8 +104,8 @@ static int acpi_register_gsi_xen_hvm(struct device *dev, u32 gsi, if (!xen_hvm_domain()) return -1; - return xen_register_pirq(gsi, -1 /* no GSI override */, - trigger, false /* no PIRQ allocation */); + return xen_register_pirq(gsi, -1 /* no GSI override */, trigger, + false /* no mapping of GSI to PIRQ */); } #ifdef CONFIG_XEN_DOM0 @@ -430,7 +422,7 @@ static __init void xen_setup_acpi_sci(void) int __init pci_xen_initial_domain(void) { - int pirq, irq; + int irq; #ifdef CONFIG_PCI_MSI x86_msi.setup_msi_irqs = xen_initdom_setup_msi_irqs; @@ -447,16 +439,11 @@ int __init pci_xen_initial_domain(void) xen_register_pirq(irq, -1 /* no GSI override */, trigger ? ACPI_LEVEL_SENSITIVE : ACPI_EDGE_SENSITIVE, - true /* allocate IRQ */); + true /* Map GSI to PIRQ */); } if (0 == nr_ioapics) { - for (irq = 0; irq < NR_IRQS_LEGACY; irq++) { - pirq = xen_allocate_pirq_gsi(irq); - if (WARN(pirq < 0, - "Could not allocate PIRQ for legacy interrupt\n")) - break; - irq = xen_bind_pirq_gsi_to_irq(irq, pirq, 0, "xt-pic"); - } + for (irq = 0; irq < NR_IRQS_LEGACY; irq++) + xen_bind_pirq_gsi_to_irq(irq, irq, 0, "xt-pic"); } return 0; } |