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powerpc: Fix no interrupt handling in pata_of_platform 

When no interrupt is specified the pata_of_platform fills the irq_res
resource with -1, which is wrong to do for two reasons:

1. By definition, 'no irq' should be IRQ 0, not some negative integer;
2. pata_platform checks for irq_res.start > 0, but since irq_res.start
   is unsigned type, the check will be true for `-1'.

Reported-by: Steven A. Falco <sfalco@harris.com>
Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
This commit is contained in:
Anton Vorontsov 2008-10-06 07:26:54 +00:00 committed by Benjamin Herrenschmidt
parent 9fd3f88cb6
commit 4538d0ca71
1 changed files with 1 additions and 1 deletions
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2
drivers/ata/pata_of_platform.c
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@ -52,7 +52,7 @@ static int __devinit pata_of_platform_probe(struct of_device *ofdev,
ret = of_irq_to_resource(dn, 0, &irq_res);
if (ret == NO_IRQ)
irq_res.start = irq_res.end = -1;
irq_res.start = irq_res.end = 0;
else
irq_res.flags = 0;