[PATCH 4.19 097/421] sata_highbank: fix deferred probing

[Greg Kroah-Hartman]

From: Sergey Shtylyov <s.shtylyov@xxxxxxxxxxxx>

[ Upstream commit 4a24efa16e7db02306fb5db84518bb0a7ada5a46 ]

The driver overrides the error codes returned by platform_get_irq() to
-EINVAL, so if it returns -EPROBE_DEFER, the driver would fail the probe
permanently instead of the deferred probing. Switch to propagating the
error code upstream, still checking/overriding IRQ0 as libata regards it
as "no IRQ" (thus polling) anyway...

Fixes: 9ec36cafe43b ("of/irq: do irq resolution in platform_get_irq")
Signed-off-by: Sergey Shtylyov <s.shtylyov@xxxxxxxxxxxx>
Link: https://lore.kernel.org/r/105b456d-1199-f6e9-ceb7-ffc5ba551d1a@xxxxxxxxxxxx
Signed-off-by: Jens Axboe <axboe@xxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
 drivers/ata/sata_highbank.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/ata/sata_highbank.c b/drivers/ata/sata_highbank.c
index e67815b896fc..1dd47a05b34b 100644
--- a/drivers/ata/sata_highbank.c
+++ b/drivers/ata/sata_highbank.c
@@ -483,10 +483,12 @@ static int ahci_highbank_probe(struct platform_device *pdev)
 	}
 
 	irq = platform_get_irq(pdev, 0);
-	if (irq <= 0) {
+	if (irq < 0) {
 		dev_err(dev, "no irq\n");
-		return -EINVAL;
+		return irq;
 	}
+	if (!irq)
+		return -EINVAL;
 
 	hpriv = devm_kzalloc(dev, sizeof(*hpriv), GFP_KERNEL);
 	if (!hpriv) {
-- 
2.30.2