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x86, ioapic: Throw BUG instead of NULL dereference

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Instead of plain NULL deref we better throw error
message with a backtrace. Actually we need more
gracious error handling here. Meanwhile leave it
as is.

Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
Cc: yinghai@kernel.org
LKML-Reference: <20090801075435.769301745@openvz.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Cyrill Gorcunov 2009-08-01 11:48:00 +04:00 committed by Ingo Molnar
parent 2977fb3ffc
commit a7428cd2ef
1 changed files with 4 additions and 0 deletions
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4
arch/x86/kernel/apic/io_apic.c
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@ -503,6 +503,10 @@ static void add_pin_to_irq_node(struct irq_cfg *cfg, int node, int apic, int pin
} }
entry = get_one_free_irq_2_pin(node); entry = get_one_free_irq_2_pin(node);
if (!entry) {
printk(KERN_ERR "can not alloc irq_pin_list\n");
BUG_ON(1);
}
entry->apic = apic; entry->apic = apic;
entry->pin = pin; entry->pin = pin;