From 9f83cfdb1ace3ef268ecc6fda50058d2ec37d603 Mon Sep 17 00:00:00 2001
From: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Date: Sat, 24 Nov 2018 21:14:16 +0300
Subject: [PATCH] sata_rcar: fix deferred probing
Git-commit: 9f83cfdb1ace3ef268ecc6fda50058d2ec37d603
Patch-mainline: v5.0-rc1
References: bsc#1051510

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")
Reviewed-by: Simon Horman <horms+renesas@verge.net.au>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Acked-by: Takashi Iwai <tiwai@suse.de>

---
 drivers/ata/sata_rcar.c |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

--- a/drivers/ata/sata_rcar.c
+++ b/drivers/ata/sata_rcar.c
@@ -872,7 +872,9 @@ static int sata_rcar_probe(struct platfo
 	int ret = 0;
 
 	irq = platform_get_irq(pdev, 0);
-	if (irq <= 0)
+	if (irq < 0)
+		return irq;
+	if (!irq)
 		return -EINVAL;
 
 	priv = devm_kzalloc(&pdev->dev, sizeof(struct sata_rcar_priv),