linux-kernel - [PATCHv3 13/16] OMAP: I2C: Handle error check for pm runtime

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Message-ID: <1333122611-29953-14-git-send-email-shubhrajyoti@ti.com>
Date:	Fri, 30 Mar 2012 21:20:08 +0530
From:	Shubhrajyoti D <shubhrajyoti@...com>
To:	<linux-i2c@...r.kernel.org>
CC:	<linux-kernel@...r.kernel.org>,
	Shubhrajyoti D <shubhrajyoti@...com>
Subject: [PATCHv3 13/16] OMAP: I2C: Handle error check for pm runtime

If PM runtime get_sync fails return with the error
so that no further reads/writes goes through the interface.
This will avoid possible abort.

Signed-off-by: Shubhrajyoti D <shubhrajyoti@...com>
---
 drivers/i2c/busses/i2c-omap.c |   13 ++++++++++---
 1 files changed, 10 insertions(+), 3 deletions(-)

diff --git a/drivers/i2c/busses/i2c-omap.c b/drivers/i2c/busses/i2c-omap.c
index 1ea7b74..b098650 100644
--- a/drivers/i2c/busses/i2c-omap.c
+++ b/drivers/i2c/busses/i2c-omap.c
@@ -616,7 +616,9 @@ omap_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg msgs[], int num)
 	int i;
 	int r;
 
-	pm_runtime_get_sync(dev->dev);
+	r = pm_runtime_get_sync(dev->dev);
+	if (r < 0)
+		return r;
 
 	r = omap_i2c_wait_for_bb(dev);
 	if (r < 0)
@@ -1044,7 +1046,9 @@ omap_i2c_probe(struct platform_device *pdev)
 		dev->regs = (u8 *)reg_map_ip_v1;
 
 	pm_runtime_enable(dev->dev);
-	pm_runtime_get_sync(dev->dev);
+	r = pm_runtime_get_sync(dev->dev);
+	if (r < 0)
+		return r;
 
 	dev->rev = omap_i2c_read_reg(dev, OMAP_I2C_REV_REG) & 0xff;
 
@@ -1129,12 +1133,15 @@ err_unuse_clocks:
 static int __devexit omap_i2c_remove(struct platform_device *pdev)
 {
 	struct omap_i2c_dev	*dev = platform_get_drvdata(pdev);
+	int ret;
 
 	platform_set_drvdata(pdev, NULL);
 
 	free_irq(dev->irq, dev);
 	i2c_del_adapter(&dev->adapter);
-	pm_runtime_get_sync(&pdev->dev);
+	ret = pm_runtime_get_sync(&pdev->dev);
+	if (ret < 0)
+		return ret;
 	omap_i2c_write_reg(dev, OMAP_I2C_CON_REG, 0);
 	pm_runtime_put(&pdev->dev);
 	pm_runtime_disable(&pdev->dev);
-- 
1.7.1

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