linux-kernel - [PATCH 3.19 151/177] i2c: rk3x: report number of messages transmitted

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Message-Id: <20150502190126.903601075@linuxfoundation.org>
Date:	Sat,  2 May 2015 21:02:53 +0200
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	stable@...r.kernel.org,
	Dmitry Torokhov <dmitry.torokhov@...il.com>,
	Wolfram Sang <wsa@...-dreams.de>
Subject: [PATCH 3.19 151/177] i2c: rk3x: report number of messages transmitted

3.19-stable review patch.  If anyone has any objections, please let me know.

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

From: Dmitry Torokhov <dmitry.torokhov@...il.com>

commit c6cbfb91b878224e78408a2e15901c79de77115a upstream.

master_xfer() method should return number of i2c messages transferred,
but on Rockchip we were usually returning just 1, which caused trouble
with users that actually check number of transferred messages vs.
checking for negative error codes.

Signed-off-by: Dmitry Torokhov <dmitry.torokhov@...il.com>
Signed-off-by: Wolfram Sang <wsa@...-dreams.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/i2c/busses/i2c-rk3x.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/i2c/busses/i2c-rk3x.c
+++ b/drivers/i2c/busses/i2c-rk3x.c
@@ -800,7 +800,7 @@ static int rk3x_i2c_xfer(struct i2c_adap
 	clk_disable(i2c->clk);
 	spin_unlock_irqrestore(&i2c->lock, flags);
 
-	return ret;
+	return ret < 0 ? ret : num;
 }
 
 static u32 rk3x_i2c_func(struct i2c_adapter *adap)


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