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Code Issues Releases Wiki Activity

x86: fix mpparse/acpi interaction

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Sitsofe Wheeler reported boot problems on linux-next.

It looks like the same issue as found by Soeren Sandman in 7575217f656a93,
"x86: initialize all fields of mp_irqs[mp_irq_entries]".

But his fix is also not complete, as dstapic is used before it assigned.

Reported-by: Sitsofe Wheeler <sitsofe@yahoo.com>
Bisected-by: Sitsofe Wheeler <sitsofe@yahoo.com>
Signed-off-by: Alexey Starikovskiy <astarikovskiy@suse.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Alexey Starikovskiy 2008-05-22 12:26:15 +04:00 committed by Thomas Gleixner
parent 59f4519ad7
commit aafbdf71f1
1 changed files with 5 additions and 4 deletions
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9
arch/x86/kernel/acpi/boot.c
View file

@ -1019,6 +1019,11 @@ void __init mp_config_acpi_legacy_irqs(void)
for (i = 0; i < 16; i++) {
int idx;
mp_irqs[mp_irq_entries].mp_type = MP_INTSRC;
mp_irqs[mp_irq_entries].mp_irqflag = 0; /* Conforming */
mp_irqs[mp_irq_entries].mp_srcbus = MP_ISA_BUS;
mp_irqs[mp_irq_entries].mp_dstapic = mp_ioapics[ioapic].mp_apicid;
for (idx = 0; idx < mp_irq_entries; idx++) {
struct mp_config_intsrc *irq = mp_irqs + idx;
@ -1039,10 +1044,6 @@ void __init mp_config_acpi_legacy_irqs(void)
continue; /* IRQ already used */
}
mp_irqs[mp_irq_entries].mp_type = MP_INTSRC;
mp_irqs[mp_irq_entries].mp_irqflag = 0; /* Conforming */
mp_irqs[mp_irq_entries].mp_srcbus = MP_ISA_BUS;
mp_irqs[mp_irq_entries].mp_dstapic = mp_ioapics[ioapic].mp_apicid;
mp_irqs[mp_irq_entries].mp_irqtype = mp_INT;
mp_irqs[mp_irq_entries].mp_srcbusirq = i; /* Identity mapped */
mp_irqs[mp_irq_entries].mp_dstirq = i;