commit
ae10ccdc3093486f8c2369d227583f9d79f628e5 upstream.
Currently when acpi_skip_timer_override is set, it only cover the
(source_irq == 0 && global_irq == 2) cases. While there is also
platform which need use this option and its global_irq is not 2.
This patch will extend acpi_skip_timer_override to cover all
timer overriding cases as long as the source irq is 0.
This is the first part of a fix to kernel bug bugzilla 40002:
"IRQ 0 assigned to VGA"
https://bugzilla.kernel.org/show_bug.cgi?id=40002
Reported-and-tested-by: Szymon Kowalczyk <fazerxlo@o2.pl>
Signed-off-by: Feng Tang <feng.tang@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
- if (intsrc->source_irq == 0 && intsrc->global_irq == 2) {
+ if (intsrc->source_irq == 0) {
if (acpi_skip_timer_override) {
if (acpi_skip_timer_override) {
- printk(PREFIX "BIOS IRQ0 pin2 override ignored.\n");
+ printk(PREFIX "BIOS IRQ0 override ignored.\n");
- if (acpi_fix_pin2_polarity && (intsrc->inti_flags & ACPI_MADT_POLARITY_MASK)) {
+
+ if ((intsrc->global_irq == 2) && acpi_fix_pin2_polarity
+ && (intsrc->inti_flags & ACPI_MADT_POLARITY_MASK)) {
intsrc->inti_flags &= ~ACPI_MADT_POLARITY_MASK;
printk(PREFIX "BIOS IRQ0 pin2 override: forcing polarity to high active.\n");
}
intsrc->inti_flags &= ~ACPI_MADT_POLARITY_MASK;
printk(PREFIX "BIOS IRQ0 pin2 override: forcing polarity to high active.\n");
}
- * Force ignoring BIOS IRQ0 pin2 override
+ * Force ignoring BIOS IRQ0 override
*/
static int __init dmi_ignore_irq0_timer_override(const struct dmi_system_id *d)
{
*/
static int __init dmi_ignore_irq0_timer_override(const struct dmi_system_id *d)
{
*/
if (!acpi_skip_timer_override) {
WARN(1, KERN_ERR "ati_ixp4x0 quirk not complete.\n");
*/
if (!acpi_skip_timer_override) {
WARN(1, KERN_ERR "ati_ixp4x0 quirk not complete.\n");
- pr_notice("%s detected: Ignoring BIOS IRQ0 pin2 override\n",
+ pr_notice("%s detected: Ignoring BIOS IRQ0 override\n",
d->ident);
acpi_skip_timer_override = 1;
}
d->ident);
acpi_skip_timer_override = 1;
}
* is enabled. This input is incorrectly designated the
* ISA IRQ 0 via an interrupt source override even though
* it is wired to the output of the master 8259A and INTIN0
* is enabled. This input is incorrectly designated the
* ISA IRQ 0 via an interrupt source override even though
* it is wired to the output of the master 8259A and INTIN0
- * is not connected at all. Force ignoring BIOS IRQ0 pin2
+ * is not connected at all. Force ignoring BIOS IRQ0
* override in that cases.
*/
{
* override in that cases.
*/
{