linux-kernel - [PATCH 06/10 v2] Input: w90p910_ts: Handle return value of platform_get

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Message-Id: <1d35ad94214f0e0ba6cd50d443067c323121486b.1510999334.git.arvind.yadav.cs@gmail.com>
Date:   Sat, 18 Nov 2017 16:25:13 +0530
From:   Arvind Yadav <arvind.yadav.cs@...il.com>
To:     dmitry.torokhov@...il.com, maxime.ripard@...e-electrons.com,
        wens@...e.org, mcuos.com@...il.com, linux@...ck-us.net,
        linux@...linux.org.uk, lee.jones@...aro.org
Cc:     linux-kernel@...r.kernel.org, linux-input@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org
Subject: [PATCH 06/10 v2] Input: w90p910_ts: Handle return value of platform_get_irq

platform_get_irq() can fail here and we must check its return value.

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

 drivers/input/touchscreen/w90p910_ts.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/input/touchscreen/w90p910_ts.c b/drivers/input/touchscreen/w90p910_ts.c
index 638c1d7..fa74f2c 100644
--- a/drivers/input/touchscreen/w90p910_ts.c
+++ b/drivers/input/touchscreen/w90p910_ts.c
@@ -277,6 +277,10 @@ static int w90x900ts_probe(struct platform_device *pdev)
 	input_set_drvdata(input_dev, w90p910_ts);
 
 	w90p910_ts->irq_num = platform_get_irq(pdev, 0);
+	if (w90p910_ts->irq_num <= 0) {
+		err = w90p910_ts->irq_num;
+		goto fail4;
+	}
 	if (request_irq(w90p910_ts->irq_num, w90p910_ts_interrupt,
 			0, "w90p910ts", w90p910_ts)) {
 		err = -EBUSY;
-- 
2.7.4