linux-kernel - [PATCH v2 13/17] i2c: tegra: Check errors for both positive and negative values

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Date:   Wed,  2 Sep 2020 00:10:58 +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>
Cc:     linux-i2c@...r.kernel.org, linux-tegra@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH v2 13/17] i2c: tegra: Check errors for both positive and negative values

The driver's code is inconsistent in regards to the error values checking.
The correct way should be to check both positive and negative values.
This patch cleans up the error-checks in the code. Note that the
pm_runtime_get_sync() could return positive value on success, hence only
relevant parts of the code are changed by this patch.

Signed-off-by: Dmitry Osipenko <digetx@...il.com>
---
 drivers/i2c/busses/i2c-tegra.c | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/drivers/i2c/busses/i2c-tegra.c b/drivers/i2c/busses/i2c-tegra.c
index bc891d4b41ad..9a807caef4a6 100644
--- a/drivers/i2c/busses/i2c-tegra.c
+++ b/drivers/i2c/busses/i2c-tegra.c
@@ -674,19 +674,19 @@ static int __maybe_unused tegra_i2c_runtime_resume(struct device *dev)
 		return ret;
 
 	ret = clk_enable(i2c_dev->fast_clk);
-	if (ret < 0) {
+	if (ret) {
 		dev_err(dev, "failed to enable fast clock: %d\n", ret);
 		return ret;
 	}
 
 	ret = clk_enable(i2c_dev->slow_clk);
-	if (ret < 0) {
+	if (ret) {
 		dev_err(dev, "failed to enable slow clock: %d\n", ret);
 		goto disable_fast_clk;
 	}
 
 	ret = clk_enable(i2c_dev->div_clk);
-	if (ret < 0) {
+	if (ret) {
 		dev_err(dev, "failed to enable div clock: %d\n", ret);
 		goto disable_slow_clk;
 	}
@@ -1047,7 +1047,7 @@ static void tegra_i2c_config_fifo_trig(struct tegra_i2c_dev *i2c_dev,
 
 		slv_config.device_fc = true;
 		ret = dmaengine_slave_config(chan, &slv_config);
-		if (ret < 0) {
+		if (ret) {
 			dev_err(i2c_dev->dev, "dma config failed: %d\n", ret);
 			dev_err(i2c_dev->dev, "falling back to PIO\n");
 			tegra_i2c_release_dma(i2c_dev);
@@ -1235,7 +1235,7 @@ static int tegra_i2c_xfer_msg(struct tegra_i2c_dev *i2c_dev,
 						   xfer_size,
 						   DMA_FROM_DEVICE);
 			err = tegra_i2c_dma_submit(i2c_dev, xfer_size);
-			if (err < 0) {
+			if (err) {
 				dev_err(i2c_dev->dev,
 					"starting rx dma failed: %d\n", err);
 				return err;
@@ -1294,7 +1294,7 @@ static int tegra_i2c_xfer_msg(struct tegra_i2c_dev *i2c_dev,
 						   xfer_size,
 						   DMA_TO_DEVICE);
 			err = tegra_i2c_dma_submit(i2c_dev, xfer_size);
-			if (err < 0) {
+			if (err) {
 				dev_err(i2c_dev->dev,
 					"starting tx dma failed: %d\n", err);
 				return err;
-- 
2.27.0