[PATCH] libata: interrupt driven pio for LLD
libata.h: libata-core: Add ATA_FLAG_PIO_POLLING flag for LLDs that expect interrupt for command completion only. sata_nv.c: sata_vsc.c: irq handler is wrapper around ata_host_intr(), can handle PIO interrupts. sata_promise.c: sata_sx4.c: sata_qstor.c: sata_mv.c: Private irq handler. Polling mode ATA_FLAG_PIO_POLLING used for compatibility. Signed-off-by: NAlbert Lee <albertcc@tw.ibm.com> Signed-off-by: NJeff Garzik <jgarzik@pobox.com>
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