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genirq: Fix memory leak when calling irq_free_hwirqs()

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irq_free_hwirqs() always calls irq_free_descs() with a cnt == 0
which makes it a no-op since the interrupt count to free is
decremented in itself.

Fixes: 7b6ef12625

Signed-off-by: Keith Busch <[email protected]>
Acked-by: David Rientjes <[email protected]>
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Thomas Gleixner <[email protected]>
This commit is contained in:
Keith Busch 2014-06-30 16:24:44 -06:00 • committed by Thomas Gleixner
commit 8844aad89e
1 changed files with 2 additions and 2 deletions
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4
kernel/irq/irqdesc.c
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@ -455,9 +455,9 @@ EXPORT_SYMBOL_GPL(irq_alloc_hwirqs);
*/
void irq_free_hwirqs(unsigned int from, int cnt)
{
int i;
int i, j;
for (i = from; cnt > 0; i++, cnt--) {
for (i = from, j = cnt; j > 0; i++, j--) {
irq_set_status_flags(i, _IRQ_NOREQUEST | _IRQ_NOPROBE);
arch_teardown_hwirq(i);
}