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| /openbmc/linux/drivers/ata/ |
| H A D | sata_mv.c | diff 96e2c487933e5f69e98fffdcae2c35c78a671c07 Sat May 17 12:38:00 CDT 2008 Mark Lord <liml@rtr.ca> sata_mv: cache main_irq_mask register in hpriv
Part five of simplifying/fixing handling of the main_irq_mask register
to resolve unexpected interrupt issues observed in 2.6.26-rc*.
Keep a cached copy of the main_irq_mask so that we don't have
to stall the CPU to read it on every pass through mv_interrupt.
This significantly speeds up interrupt handling, both for sata_mv,
and for any other driver/device sharing the same PCI IRQ line.
Signed-off-by: Mark Lord <mlord@pobox.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
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