linux-kernel - [PATCH 1/6 v3] mmc: meson-gx-mmc: Fix platform_get

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Date:   Sun, 19 Nov 2017 10:22:43 +0530
From:   Arvind Yadav <arvind.yadav.cs@...il.com>
To:     ben-linux@...ff.org, ulf.hansson@...aro.org,
        adrian.hunter@...el.com, vireshk@...nel.org,
        maxime.ripard@...e-electrons.com, wens@...e.org,
        linux@...linux.org.uk, carlo@...one.org, khilman@...libre.com
Cc:     linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-mmc@...r.kernel.org, linux-amlogic@...ts.infradead.org
Subject: [PATCH 1/6 v3] mmc: meson-gx-mmc: Fix platform_get_irq's error checking

The platform_get_irq() function returns negative if an error occurs.
zero or positive number on success. platform_get_irq() error checking
for zero is not correct.

Signed-off-by: Arvind Yadav <arvind.yadav.cs@...il.com>
---
changes in v2 :
              Add failure case '<= 0' instead of '< 0'. IRQ0 is not valid.
changes in v3 :
              return -EINVAL instead of irq.

 drivers/mmc/host/meson-gx-mmc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/mmc/host/meson-gx-mmc.c b/drivers/mmc/host/meson-gx-mmc.c
index e0862d3..32a6a22 100644
--- a/drivers/mmc/host/meson-gx-mmc.c
+++ b/drivers/mmc/host/meson-gx-mmc.c
@@ -1208,7 +1208,7 @@ static int meson_mmc_probe(struct platform_device *pdev)
 	}
 
 	irq = platform_get_irq(pdev, 0);
-	if (!irq) {
+	if (irq <= 0) {
 		dev_err(&pdev->dev, "failed to get interrupt resource.\n");
 		ret = -EINVAL;
 		goto free_host;
-- 
2.7.4