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ata: libahci_platform: fix IRQ check 

[ Upstream commit b30d0040f06159de97ad9c0b1536f47250719d7d ]

Iff platform_get_irq() returns 0, ahci_platform_init_host() would return 0
early (as if the call was successful). Override IRQ0 with -EINVAL instead
as the 'libata' regards 0 as "no IRQ" (thus polling) anyway...

Fixes: c034640a32 ("ata: libahci: properly propagate return value of platform_get_irq()")
Signed-off-by: Sergey Shtylyov <s.shtylyov@omprussia.ru>
Link: https://lore.kernel.org/r/4448c8cc-331f-2915-0e17-38ea34e251c8@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 2021-03-15 23:15:06 +03:00 committed by Greg Kroah-Hartman
parent bafcaa0165
commit 4bbae57c7b
1 changed files with 3 additions and 1 deletions
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4
drivers/ata/libahci_platform.c
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@ -582,11 +582,13 @@ int ahci_platform_init_host(struct platform_device *pdev,
int i, irq, n_ports, rc;
irq = platform_get_irq(pdev, 0);
if (irq <= 0) {
if (irq < 0) {
if (irq != -EPROBE_DEFER)
dev_err(dev, "no irq\n");
return irq;
}
if (!irq)
return -EINVAL;
hpriv->irq = irq;