Techwizz/kernel-fxtec-pro1x
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity

Merge branch 'stable/bug.fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen

Browse source 
* 'stable/bug.fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen:
  xen/pci: Move check for acpi_sci_override_gsi to xen_setup_acpi_sci.
This commit is contained in:
Linus Torvalds 2011-07-07 13:19:04 -07:00
commit 075d9db131
1 changed files with 28 additions and 28 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

56
arch/x86/pci/xen.c
View file

@ -327,13 +327,12 @@ int __init pci_xen_hvm_init(void)
}
#ifdef CONFIG_XEN_DOM0
static int xen_register_pirq(u32 gsi, int triggering)
static int xen_register_pirq(u32 gsi, int gsi_override, int triggering)
{
int rc, pirq, irq = -1;
struct physdev_map_pirq map_irq;
int shareable = 0;
char *name;
bool gsi_override = false;
if (!xen_pv_domain())
return -1;
@ -345,31 +344,12 @@ static int xen_register_pirq(u32 gsi, int triggering)
shareable = 1;
name = "ioapic-level";
}
pirq = xen_allocate_pirq_gsi(gsi);
if (pirq < 0)
goto out;
/* Before we bind the GSI to a Linux IRQ, check whether
* we need to override it with bus_irq (IRQ) value. Usually for
* IRQs below IRQ_LEGACY_IRQ this holds IRQ == GSI, as so:
* ACPI: INT_SRC_OVR (bus 0 bus_irq 9 global_irq 9 low level)
* but there are oddballs where the IRQ != GSI:
* ACPI: INT_SRC_OVR (bus 0 bus_irq 9 global_irq 20 low level)
* which ends up being: gsi_to_irq[9] == 20
* (which is what acpi_gsi_to_irq ends up calling when starting the
* the ACPI interpreter and keels over since IRQ 9 has not been
* setup as we had setup IRQ 20 for it).
*/
if (gsi == acpi_sci_override_gsi) {
/* Check whether the GSI != IRQ */
acpi_gsi_to_irq(gsi, &irq);
if (irq != gsi)
/* Bugger, we MUST have that IRQ. */
gsi_override = true;
}
if (gsi_override)
irq = xen_bind_pirq_gsi_to_irq(irq, pirq, shareable, name);
if (gsi_override >= 0)
irq = xen_bind_pirq_gsi_to_irq(gsi_override, pirq, shareable, name);
else
irq = xen_bind_pirq_gsi_to_irq(gsi, pirq, shareable, name);
if (irq < 0)
@ -392,7 +372,7 @@ static int xen_register_pirq(u32 gsi, int triggering)
return irq;
}
static int xen_register_gsi(u32 gsi, int triggering, int polarity)
static int xen_register_gsi(u32 gsi, int gsi_override, int triggering, int polarity)
{
int rc, irq;
struct physdev_setup_gsi setup_gsi;
@ -403,7 +383,7 @@ static int xen_register_gsi(u32 gsi, int triggering, int polarity)
printk(KERN_DEBUG "xen: registering gsi %u triggering %d polarity %d\n",
gsi, triggering, polarity);
irq = xen_register_pirq(gsi, triggering);
irq = xen_register_pirq(gsi, gsi_override, triggering);
setup_gsi.gsi = gsi;
setup_gsi.triggering = (triggering == ACPI_EDGE_SENSITIVE ? 0 : 1);
@ -425,6 +405,8 @@ static __init void xen_setup_acpi_sci(void)
int rc;
int trigger, polarity;
int gsi = acpi_sci_override_gsi;
int irq = -1;
int gsi_override = -1;
if (!gsi)
return;
@ -441,7 +423,25 @@ static __init void xen_setup_acpi_sci(void)
printk(KERN_INFO "xen: sci override: global_irq=%d trigger=%d "
"polarity=%d\n", gsi, trigger, polarity);
gsi = xen_register_gsi(gsi, trigger, polarity);
/* Before we bind the GSI to a Linux IRQ, check whether
* we need to override it with bus_irq (IRQ) value. Usually for
* IRQs below IRQ_LEGACY_IRQ this holds IRQ == GSI, as so:
* ACPI: INT_SRC_OVR (bus 0 bus_irq 9 global_irq 9 low level)
* but there are oddballs where the IRQ != GSI:
* ACPI: INT_SRC_OVR (bus 0 bus_irq 9 global_irq 20 low level)
* which ends up being: gsi_to_irq[9] == 20
* (which is what acpi_gsi_to_irq ends up calling when starting the
* the ACPI interpreter and keels over since IRQ 9 has not been
* setup as we had setup IRQ 20 for it).
*/
/* Check whether the GSI != IRQ */
if (acpi_gsi_to_irq(gsi, &irq) == 0) {
if (irq >= 0 && irq != gsi)
/* Bugger, we MUST have that IRQ. */
gsi_override = irq;
}
gsi = xen_register_gsi(gsi, gsi_override, trigger, polarity);
printk(KERN_INFO "xen: acpi sci %d\n", gsi);
return;
@ -450,7 +450,7 @@ static __init void xen_setup_acpi_sci(void)
static int acpi_register_gsi_xen(struct device *dev, u32 gsi,
int trigger, int polarity)
{
return xen_register_gsi(gsi, trigger, polarity);
return xen_register_gsi(gsi, -1 /* no GSI override */, trigger, polarity);
}
static int __init pci_xen_initial_domain(void)
@ -489,7 +489,7 @@ void __init xen_setup_pirqs(void)
if (acpi_get_override_irq(irq, &trigger, &polarity) == -1)
continue;
xen_register_pirq(irq,
xen_register_pirq(irq, -1 /* no GSI override */,
trigger ? ACPI_LEVEL_SENSITIVE : ACPI_EDGE_SENSITIVE);
}
}