From: Alan Cox If a card has no IRQ then pass no interrupt handler but allow polled usage. Signed-off-by: Alan Cox Signed-off-by: Andrew Morton --- drivers/ata/pata_isapnp.c | 11 +++++++---- 1 file changed, 7 insertions(+), 4 deletions(-) diff -puN drivers/ata/pata_isapnp.c~pata_isapnp-polled-devices drivers/ata/pata_isapnp.c --- a/drivers/ata/pata_isapnp.c~pata_isapnp-polled-devices +++ a/drivers/ata/pata_isapnp.c @@ -75,13 +75,16 @@ static int isapnp_init_one(struct pnp_de struct ata_host *host; struct ata_port *ap; void __iomem *cmd_addr, *ctl_addr; + int irq = 0; + irq_handler_t handler = NULL; if (pnp_port_valid(idev, 0) == 0) return -ENODEV; - /* FIXME: Should selected polled PIO here not fail */ - if (pnp_irq_valid(idev, 0) == 0) - return -ENODEV; + if (pnp_irq_valid(idev, 0)) { + irq = pnp_irq(idev, 0); + handler = ata_interrupt; + } /* allocate host */ host = ata_host_alloc(&idev->dev, 1); @@ -115,7 +118,7 @@ static int isapnp_init_one(struct pnp_de (unsigned long long)pnp_port_start(idev, 1)); /* activate */ - return ata_host_activate(host, pnp_irq(idev, 0), ata_interrupt, 0, + return ata_host_activate(host, irq, handler, 0, &isapnp_sht); } _