]> err.no Git - linux-2.6/commit
PNPACPI: ignore _PRS interrupt numbers larger than PNP_IRQ_NR
authorBjorn Helgaas <bjorn.helgaas@hp.com>
Fri, 27 Jun 2008 22:57:12 +0000 (16:57 -0600)
committerAndi Kleen <andi@basil.nowhere.org>
Wed, 16 Jul 2008 21:27:07 +0000 (23:27 +0200)
commitfe2cf598e6942abd8fb70fee230d74b1a1eae0d1
tree9b812788832205f05d2d1cf3bdb654702a7824d0
parentc227536b4cc2600fc9d22ba0067f699165f6621f
PNPACPI: ignore _PRS interrupt numbers larger than PNP_IRQ_NR

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@hp.com>
Signed-off-by: Andi Kleen <ak@linux.intel.com>
Acked-by: Rene Herman <rene.herman@gmail.com>
Signed-off-by: Len Brown <len.brown@intel.com>
drivers/pnp/pnpacpi/rsparser.c