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From:   Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To:     linux-kernel@vger.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        stable@vger.kernel.org,
        "Gustavo A. R. Silva" <gustavo@embeddedor.com>,
        Linus Walleij <linus.walleij@linaro.org>,
        Sasha Levin <sashal@kernel.org>
Subject: [PATCH 4.4 069/114] gpio: msic: fix error return code in platform_msic_gpio_probe()
Date:   Thu,  8 Nov 2018 13:51:24 -0800
Message-Id: <20181108215107.276985381@linuxfoundation.org>
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4.4-stable review patch.  If anyone has any objections, please let me know.

------------------

[ Upstream commit ca1f3ae3154ad6d08caa740c99be0d86644a4e44 ]

platform_get_irq() returns an error code, but the gpio-msic 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 and propagate the return value of platform_get_irq on failure.

Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/gpio/gpio-msic.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/gpio/gpio-msic.c b/drivers/gpio/gpio-msic.c
index 22523aae8abe..3abf066f93d3 100644
--- a/drivers/gpio/gpio-msic.c
+++ b/drivers/gpio/gpio-msic.c
@@ -266,8 +266,8 @@ static int platform_msic_gpio_probe(struct platform_device *pdev)
 	int i;
 
 	if (irq < 0) {
-		dev_err(dev, "no IRQ line\n");
-		return -EINVAL;
+		dev_err(dev, "no IRQ line: %d\n", irq);
+		return irq;
 	}
 
 	if (!pdata || !pdata->gpio_base) {
-- 
2.17.1