Re: [patch 12/15] PNPACPI: ignore _PRS interrupt numbers larger thanPNP_IRQ_NR

From: Rene Herman
Date: Sun Jun 01 2008 - 19:20:30 EST


On 31-05-08 00:49, Bjorn Helgaas wrote:

ACPI Extended Interrupt Descriptors can encode 32-bit interrupt
numbers, so an interrupt number may exceed the size of the bitmap
we use to track possible IRQ settings.

To avoid corrupting memory, complain and ignore too-large interrupt
numbers.

There's similar code in pnpacpi_parse_irq_option(), but I didn't
change that because the small IRQ descriptor can only encode
IRQs 0-15, which do not exceed bitmap size.

In the future, we could handle IRQ numbers greater than PNP_IRQ_NR
by replacing the bitmap with a table or list.

Signed-off-by: Bjorn Helgaas <bjorn.helgaas@xxxxxx>

Acked-by: Rene Herman <rene.herman@xxxxxxxxx>

Rene.
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