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author | Bjorn Helgaas <bjorn.helgaas@hp.com> | 2008-06-27 16:57:12 -0600 |
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committer | Andi Kleen <andi@basil.nowhere.org> | 2008-07-16 23:27:07 +0200 |
commit | fe2cf598e6942abd8fb70fee230d74b1a1eae0d1 (patch) | |
tree | 9b812788832205f05d2d1cf3bdb654702a7824d0 /drivers/pnp/resource.c | |
parent | c227536b4cc2600fc9d22ba0067f699165f6621f (diff) | |
download | op-kernel-dev-fe2cf598e6942abd8fb70fee230d74b1a1eae0d1.zip op-kernel-dev-fe2cf598e6942abd8fb70fee230d74b1a1eae0d1.tar.gz |
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>
Diffstat (limited to 'drivers/pnp/resource.c')
0 files changed, 0 insertions, 0 deletions