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Commit 77b2bc23 authored by Sergey Shtylyov's avatar Sergey Shtylyov Committed by Greg Kroah-Hartman
Browse files

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: c034640a ("ata: libahci: properly propagate return value of platform_get_irq()")
Signed-off-by: default avatarSergey Shtylyov <s.shtylyov@omprussia.ru>
Link: https://lore.kernel.org/r/4448c8cc-331f-2915-0e17-38ea34e251c8@omprussia.ru


Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>
Signed-off-by: default avatarSasha Levin <sashal@kernel.org>
parent d59b3aa3

drivers/ata/libahci_platform.c

+3 −1
Original line number Diff line number Diff line
@@ -544,11 +544,13 @@ 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;