linux-kernel - [PATCH AUTOSEL 4.4 59/65] ASoC: spear: fix error return code in spdif_in

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Message-Id: <20181025141705.213937-59-sashal@kernel.org>
Date:   Thu, 25 Oct 2018 10:16:59 -0400
From:   Sasha Levin <sashal@...nel.org>
To:     stable@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:     "Gustavo A. R. Silva" <garsilva@...eddedor.com>,
        Mark Brown <broonie@...nel.org>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH AUTOSEL 4.4 59/65] ASoC: spear: fix error return code in spdif_in_probe()

From: "Gustavo A. R. Silva" <garsilva@...eddedor.com>

[ Upstream commit 27d30400c448264c1ac9434cb836de0c230af213 ]

platform_get_irq() returns an error code, but the spdif_in driver
ignores it and always returns -EINVAL. This is not correct, and
prevents -EPROBE_DEFER from being propagated properly.

Notice that platform_get_irq() no longer returns 0 on error:
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=e330b9a6bb35dc7097a4f02cb1ae7b6f96df92af

Print error message and propagate the return value of platform_get_irq
on failure.

Signed-off-by: Gustavo A. R. Silva <garsilva@...eddedor.com>
Signed-off-by: Mark Brown <broonie@...nel.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 sound/soc/spear/spdif_in.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/sound/soc/spear/spdif_in.c b/sound/soc/spear/spdif_in.c
index 977a078eb92f..7f32527fc3c8 100644
--- a/sound/soc/spear/spdif_in.c
+++ b/sound/soc/spear/spdif_in.c
@@ -223,8 +223,10 @@ static int spdif_in_probe(struct platform_device *pdev)
 
 	host->io_base = io_base;
 	host->irq = platform_get_irq(pdev, 0);
-	if (host->irq < 0)
-		return -EINVAL;
+	if (host->irq < 0) {
+		dev_warn(&pdev->dev, "failed to get IRQ: %d\n", host->irq);
+		return host->irq;
+	}
 
 	host->clk = devm_clk_get(&pdev->dev, NULL);
 	if (IS_ERR(host->clk))
-- 
2.17.1