linux-kernel - [PATCH v4 26/31] i2c: tegra: Consolidate error handling in tegra_i2c_xfer

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Date:   Sat,  5 Sep 2020 23:41:46 +0300
From:   Dmitry Osipenko <digetx@...il.com>
To:     Thierry Reding <thierry.reding@...il.com>,
        Jonathan Hunter <jonathanh@...dia.com>,
        Laxman Dewangan <ldewangan@...dia.com>,
        Wolfram Sang <wsa@...-dreams.de>,
        Michał Mirosław <mirq-linux@...e.qmqm.pl>,
        Andy Shevchenko <andy.shevchenko@...il.com>
Cc:     linux-i2c@...r.kernel.org, linux-tegra@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH v4 26/31] i2c: tegra: Consolidate error handling in tegra_i2c_xfer_msg()

Consolidate error handling in tegra_i2c_xfer_msg() into a common code
path in order to make code cleaner.

Signed-off-by: Dmitry Osipenko <digetx@...il.com>
---
 drivers/i2c/busses/i2c-tegra.c | 13 +++++++++----
 1 file changed, 9 insertions(+), 4 deletions(-)

diff --git a/drivers/i2c/busses/i2c-tegra.c b/drivers/i2c/busses/i2c-tegra.c
index 64776cd8e0ff..3dd688e9462a 100644
--- a/drivers/i2c/busses/i2c-tegra.c
+++ b/drivers/i2c/busses/i2c-tegra.c
@@ -1277,8 +1277,8 @@ static int tegra_i2c_xfer_msg(struct tegra_i2c_dev *i2c_dev,
 
 		if (!time_left && !completion_done(&i2c_dev->dma_complete)) {
 			dev_err(i2c_dev->dev, "DMA transfer timeout\n");
-			tegra_i2c_init(i2c_dev);
-			return -ETIMEDOUT;
+			err = -ETIMEDOUT;
+			goto reset_hardware;
 		}
 
 		if (i2c_dev->msg_read && i2c_dev->msg_err == I2C_ERR_NONE) {
@@ -1298,8 +1298,8 @@ static int tegra_i2c_xfer_msg(struct tegra_i2c_dev *i2c_dev,
 
 	if (time_left == 0) {
 		dev_err(i2c_dev->dev, "i2c transfer timed out\n");
-		tegra_i2c_init(i2c_dev);
-		return -ETIMEDOUT;
+		err = -ETIMEDOUT;
+		goto reset_hardware;
 	}
 
 	dev_dbg(i2c_dev->dev, "transfer complete: %lu %d %d\n",
@@ -1313,6 +1313,11 @@ static int tegra_i2c_xfer_msg(struct tegra_i2c_dev *i2c_dev,
 		return err;
 
 	return 0;
+
+reset_hardware:
+	tegra_i2c_init(i2c_dev);
+
+	return err;
 }
 
 static int tegra_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg msgs[],
-- 
2.27.0