linux-kernel - [PATCH 1/2] mfd: dln2: fix _dln2

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Date:	Tue, 11 Nov 2014 14:20:56 +0200
From:	Octavian Purdila <octavian.purdila@...el.com>
To:	lee.jones@...aro.org
Cc:	laurentiu.palcu@...el.com, johan@...nel.org, wsa@...-dreams.de,
	julia.lawall@...6.fr, linux-i2c@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Octavian Purdila <octavian.purdila@...el.com>
Subject: [PATCH 1/2] mfd: dln2: fix _dln2_transfer return code

If wait_for_completion_interruptible_timeout returns a positive value
it may be propagated as the return value of _dln2_transfer. This
contradicts the documentation of the function and exposes unnecessary
internals to the callers.

This patch makes sure to set the return value to 0 in that case.

Reported-by: Julia Lawall <julia.lawall@...6.fr>
Signed-off-by: Octavian Purdila <octavian.purdila@...el.com>
---
 drivers/mfd/dln2.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/mfd/dln2.c b/drivers/mfd/dln2.c
index 9765a17..f0747a1 100644
--- a/drivers/mfd/dln2.c
+++ b/drivers/mfd/dln2.c
@@ -462,7 +462,8 @@ static int _dln2_transfer(struct dln2_dev *dln2, u16 handle, u16 cmd,
 		if (!ret)
 			ret = -ETIMEDOUT;
 		goto out_free_rx_slot;
-	}
+	} else
+		ret = 0;
 
 	if (dln2->disconnect) {
 		ret = -ENODEV;
-- 
1.9.1

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