linux-kernel - [PATCH] extcon: max77693: Fix max77693_muic

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Date:	Wed, 03 Oct 2012 10:23:58 +0800
From:	Axel Lin <axel.lin@...ics.com>
To:	linux-kernel@...r.kernel.org
Cc:	MyungJoo Ham <myungjoo.ham@...sung.com>,
	Chanwoo Choi <cw00.choi@...sung.com>
Subject: [PATCH] extcon: max77693: Fix max77693_muic_probe error handling

Fix below issues:
1. If request_threaded_irq() fails, current code does not free all requested
   irqs.
2. Add missing extcon_dev_unregister() in error path if failed to read revision
   number.

Signed-off-by: Axel Lin <axel.lin@...ics.com>
---
 drivers/extcon/extcon-max77693.c |   12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/drivers/extcon/extcon-max77693.c b/drivers/extcon/extcon-max77693.c
index e0ed622..9928c63 100644
--- a/drivers/extcon/extcon-max77693.c
+++ b/drivers/extcon/extcon-max77693.c
@@ -696,12 +696,8 @@ static int __devinit max77693_muic_probe(struct platform_device *pdev)
 				IRQF_ONESHOT, muic_irq->name, info);
 		if (ret) {
 			dev_err(&pdev->dev,
-				"failed: irq request (IRQ: %d,"
-				" error :%d)\n",
+				"failed: irq request (IRQ: %d, error :%d)\n",
 				muic_irq->irq, ret);
-
-			for (i = i - 1; i >= 0; i--)
-				free_irq(muic_irq->virq, info);
 			goto err_irq;
 		}
 	}
@@ -726,7 +722,7 @@ static int __devinit max77693_muic_probe(struct platform_device *pdev)
 			MAX77693_MUIC_REG_ID, &id);
 	if (ret < 0) {
 		dev_err(&pdev->dev, "failed to read revision number\n");
-		goto err_extcon;
+		goto err_read_reg;
 	}
 	dev_info(info->dev, "device ID : 0x%x\n", id);
 
@@ -738,9 +734,13 @@ static int __devinit max77693_muic_probe(struct platform_device *pdev)
 
 	return ret;
 
+err_read_reg:
+	extcon_dev_unregister(info->edev);
 err_extcon:
 	kfree(info->edev);
 err_irq:
+	while (--i >= 0)
+		free_irq(muic_irqs[i].virq, info);
 err_regmap:
 	kfree(info);
 err_kfree:
-- 
1.7.9.5



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