[PATCH] sata_highbank: fix deferred probing

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 <redacted>

---
This patch is againt the 'master' branch of Jens Axboe's linux-block repo.

drivers/ata/sata_highbank.c |    6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

Index: linux-block/drivers/ata/sata_highbank.c
===================================================================

--- linux-block.orig/drivers/ata/sata_highbank.c
+++ linux-block/drivers/ata/sata_highbank.c

@@ -469,10 +469,12 @@ static int ahci_highbank_probe(struct pl
 	}
 
 	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) {