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Commit d59b3aa3 authored by Sergey Shtylyov's avatar Sergey Shtylyov Committed by Greg Kroah-Hartman
Browse files

sata_mv: add IRQ checks 



[ Upstream commit e6471a65fdd5efbb8dd2732dd0f063f960685ceb ]

The function mv_platform_probe() neglects to check the results of the
calls to platform_get_irq() and irq_of_parse_and_map() and blithely
passes them to ata_host_activate() -- while the latter only checks
for IRQ0 (treating it as a polling mode indicattion) and passes the
negative values to devm_request_irq() causing it to fail as it takes
unsigned values for the IRQ #...

Add to mv_platform_probe() the proper IRQ checks to pass the positive IRQ
#s to ata_host_activate(), propagate upstream the negative error codes,
and override the IRQ0 with -EINVAL (as we don't want the polling mode).

Fixes: f351b2d6 ("sata_mv: Support SoC controllers")
Signed-off-by: default avatarSergey Shtylyov <s.shtylyov@omprussia.ru>
Link: https://lore.kernel.org/r/51436f00-27a1-e20b-c21b-0e817e0a7c86@omprussia.ru


Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>
Signed-off-by: default avatarSasha Levin <sashal@kernel.org>
parent e82c6e0c

drivers/ata/sata_mv.c

+4 −0
Original line number Diff line number Diff line
@@ -4110,6 +4110,10 @@ static int mv_platform_probe(struct platform_device *pdev) 
		n_ports = mv_platform_data->n_ports;

		irq = platform_get_irq(pdev, 0);

	}

	if (irq < 0)

		return irq;

	if (!irq)

		return -EINVAL;



	host = ata_host_alloc_pinfo(&pdev->dev, ppi, n_ports);

	hpriv = devm_kzalloc(&pdev->dev, sizeof(*hpriv), GFP_KERNEL);