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pata_ipx4xx_cf: fix IRQ check 

[ Upstream commit e379b40cc0f179403ce0b82b7e539f635a568da5 ]

The driver's probe() method is written as if platform_get_irq() returns 0
on error, while actually it returns a negative error code (with all the
other values considered valid IRQs).  Rewrite the driver's IRQ checking
code to pass the positive IRQ #s to ata_host_activate(), propagate errors
upstream, and treat IRQ0 as error, returning -EINVAL, as the libata code
treats 0  as  an indication that polling should be used anyway...

Fixes: 0df0d0a0ea ("[libata] ARM: add ixp4xx PATA driver")
Signed-off-by: Sergey Shtylyov <s.shtylyov@omprussia.ru>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Sergey Shtylyov 2021-03-25 23:51:10 +03:00 committed by Greg Kroah-Hartman
parent af9c039135
commit 782ec39b37
1 changed files with 5 additions and 1 deletions
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6
drivers/ata/pata_ixp4xx_cf.c
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@ -165,8 +165,12 @@ static int ixp4xx_pata_probe(struct platform_device *pdev)
return -ENOMEM;
irq = platform_get_irq(pdev, 0);
if (irq)
if (irq > 0)
irq_set_irq_type(irq, IRQ_TYPE_EDGE_RISING);
else if (irq < 0)
return irq;
else
return -EINVAL;
/* Setup expansion bus chip selects */
*data->cs0_cfg = data->cs0_bits;