linux-kernel - [PATCH AUTOSEL 4.19 131/258] sata

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Date:   Mon, 28 Jan 2019 10:57:17 -0500
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Sergei Shtylyov <sergei.shtylyov@...entembedded.com>,
        Jens Axboe <axboe@...nel.dk>, Sasha Levin <sashal@...nel.org>,
        linux-ide@...r.kernel.org
Subject: [PATCH AUTOSEL 4.19 131/258] sata_rcar: fix deferred probing

From: Sergei Shtylyov <sergei.shtylyov@...entembedded.com>

[ Upstream commit 9f83cfdb1ace3ef268ecc6fda50058d2ec37d603 ]

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@...ge.net.au>
Reviewed-by: Geert Uytterhoeven <geert+renesas@...der.be>
Signed-off-by: Sergei Shtylyov <sergei.shtylyov@...entembedded.com>
Signed-off-by: Jens Axboe <axboe@...nel.dk>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/ata/sata_rcar.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/ata/sata_rcar.c b/drivers/ata/sata_rcar.c
index 10ecb232245d..03867f539f3a 100644
--- a/drivers/ata/sata_rcar.c
+++ b/drivers/ata/sata_rcar.c
@@ -895,7 +895,9 @@ static int sata_rcar_probe(struct platform_device *pdev)
 	int ret = 0;
 
 	irq = platform_get_irq(pdev, 0);
-	if (irq <= 0)
+	if (irq < 0)
+		return irq;
+	if (!irq)
 		return -EINVAL;
 
 	priv = devm_kzalloc(dev, sizeof(struct sata_rcar_priv), GFP_KERNEL);
-- 
2.19.1