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[PATCH] libata: refuse to register IRQless ports 

We don't currently support pure polled operation so when we meet a BIOS
which forgot to assign an IRQ to a PCI device it all goes a little pear
shaped. Trap this case properly.

Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
This commit is contained in:
Alan Cox 2006-09-26 17:35:32 +01:00 committed by Jeff Garzik
parent e8216dee83
commit 02f076aaa1
1 changed files with 5 additions and 0 deletions
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5
drivers/ata/libata-core.c
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@ -5453,6 +5453,11 @@ int ata_device_add(const struct ata_probe_ent *ent)
int rc;
DPRINTK("ENTER\n");
if (ent->irq == 0) {
dev_printk(KERN_ERR, dev, "is not available: No interrupt assigned.\n");
return 0;
}
/* alloc a container for our list of ATA ports (buses) */
host = kzalloc(sizeof(struct ata_host) +
(ent->n_ports * sizeof(void *)), GFP_KERNEL);