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From: Shubhrajyoti D <shubhrajyoti-l0cyMroinI0@public.gmane.org>
To: linux-omap-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
Cc: linux-i2c-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
	linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org,
	ben-linux-elnMNo+KYs3YtjvyW6yDsg@public.gmane.org,
	tony-4v6yS6AI5VpBDgjK7y7TUQ@public.gmane.org,
	w.sang-bIcnvbaLZ9MEGnE8C9+IrQ@public.gmane.org,
	Shubhrajyoti D <shubhrajyoti-l0cyMroinI0@public.gmane.org>
Subject: [PATCHv8 08/18] I2C: OMAP: Fix the error handling
Date: Thu, 12 Apr 2012 18:36:25 +0530	[thread overview]
Message-ID: <1334235995-6727-9-git-send-email-shubhrajyoti@ti.com> (raw)
In-Reply-To: <1334235995-6727-1-git-send-email-shubhrajyoti-l0cyMroinI0@public.gmane.org>

Currently in probe
      pm_runtime_put(dev->dev);

...
        /* i2c device drivers may be active on return from add_adapter() */
        adap->nr = pdev->id;
        r = i2c_add_numbered_adapter(adap);
        if (r) {
                dev_err(dev->dev, "failure adding adapter\n");
                goto err_free_irq;
        }
...

        return 0;

err_free_irq:
        free_irq(dev->irq, dev);
err_unuse_clocks:
        omap_i2c_write_reg(dev, OMAP_I2C_CON_REG, 0);
        pm_runtime_put(dev->dev);

This may access the i2c registers without the clocks.
Attempting to fix the same by moving the pm_rintime_put after the error check.

Signed-off-by: Shubhrajyoti D <shubhrajyoti-l0cyMroinI0@public.gmane.org>
---
 drivers/i2c/busses/i2c-omap.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/i2c/busses/i2c-omap.c b/drivers/i2c/busses/i2c-omap.c
index 2096726..a461097 100644
--- a/drivers/i2c/busses/i2c-omap.c
+++ b/drivers/i2c/busses/i2c-omap.c
@@ -1095,8 +1095,6 @@ omap_i2c_probe(struct platform_device *pdev)
 	dev_info(dev->dev, "bus %d rev%d.%d.%d at %d kHz\n", pdev->id,
 		 dev->dtrev, dev->rev >> 4, dev->rev & 0xf, dev->speed);
 
-	pm_runtime_put(dev->dev);
-
 	adap = &dev->adapter;
 	i2c_set_adapdata(adap, dev);
 	adap->owner = THIS_MODULE;
@@ -1116,6 +1114,8 @@ omap_i2c_probe(struct platform_device *pdev)
 
 	of_i2c_register_devices(adap);
 
+	pm_runtime_put(dev->dev);
+
 	return 0;
 
 err_free_irq:
-- 
1.7.4.1

  parent reply	other threads:[~2012-04-12 13:06 UTC|newest]

Thread overview: 26+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-04-12 13:06 [PATCHv8 00/18] I2C Updates Shubhrajyoti D
2012-04-12 13:06 ` [PATCHv8 02/18] I2C: OMAP: Remove reset at init Shubhrajyoti D
2012-04-12 13:06 ` [PATCHv8 05/18] I2C: OMAP: Fix the interrupt clearing in OMAP4 Shubhrajyoti D
2012-04-12 13:06 ` [PATCHv8 06/18] I2C: OMAP: Fix the mismatch of pm_runtime enable and disable Shubhrajyoti D
2012-04-12 13:06 ` [PATCHv8 07/18] I2C: OMAP: Optimise the remove code Shubhrajyoti D
2012-04-12 13:06 ` [PATCHv8 11/18] I2C: OMAP: use devm_* functions Shubhrajyoti D
     [not found] ` <1334235995-6727-1-git-send-email-shubhrajyoti-l0cyMroinI0@public.gmane.org>
2012-04-12 13:06   ` [PATCHv8 01/18] I2C: OMAP: make omap_i2c_unidle/idle functions depend on CONFIG_PM_RUNTIME Shubhrajyoti D
2012-04-12 13:06   ` [PATCHv8 03/18] I2C: OMAP: Recover from Bus Busy condition Shubhrajyoti D
2012-04-12 13:06   ` [PATCHv8 04/18] I2C: OMAP: I2C register restore only if context is lost Shubhrajyoti D
2012-04-16 18:13     ` Tony Lindgren
2012-04-17  5:50       ` Shubhrajyoti
     [not found]     ` <1334235995-6727-5-git-send-email-shubhrajyoti-l0cyMroinI0@public.gmane.org>
2012-04-17 13:45       ` Kevin Hilman
     [not found]         ` <87d376zd2v.fsf-l0cyMroinI0@public.gmane.org>
2012-04-17 15:08           ` Shubhrajyoti Datta
2012-04-18  7:19             ` Datta, Shubhrajyoti
2012-04-18 14:08               ` Kevin Hilman
     [not found]                 ` <CANQgH-af1VCutKqpq8jK1yTPHybgvnUNA3zdfQq4AYcWcJRtvA@mail.gmail.com>
     [not found]                   ` <CANQgH-af1VCutKqpq8jK1yTPHybgvnUNA3zdfQq4AYcWcJRtvA-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2012-04-20 14:17                     ` Datta, Shubhrajyoti
2012-04-12 13:06   ` Shubhrajyoti D [this message]
2012-04-12 13:06   ` [PATCHv8 09/18] I2C: OMAP: Correct I2C revision for OMAP3 Shubhrajyoti D
2012-04-12 13:06   ` [PATCHv8 10/18] I2C: OMAP: Don't check if wait_for_completion_timeout() returns less than zero Shubhrajyoti D
2012-04-12 13:06   ` [PATCHv8 12/18] I2C: OMAP: Fix the crash in i2c remove Shubhrajyoti D
2012-04-12 13:06   ` [PATCHv8 13/18] I2C: OMAP: Handle error check for pm runtime Shubhrajyoti D
2012-04-12 13:06   ` [PATCHv8 15/18] I2C: OMAP: make the read ready processing a separate function Shubhrajyoti D
2012-04-12 13:06   ` [PATCHv8 17/18] I2C: OMAP: Do not set the XUDF if the underflow is not reached Shubhrajyoti D
2012-04-12 13:06   ` [PATCHv8 18/18] I2C: OMAP: Rename the 1p153 to the erratum id i462 Shubhrajyoti D
2012-04-12 13:06 ` [PATCHv8 14/18] I2C: OMAP: Use SET_RUNTIME_PM_OPS Shubhrajyoti D
2012-04-12 13:06 ` [PATCHv8 16/18] I2C: OMAP: fix missing handling of errata I2C_OMAP3_1P153 Shubhrajyoti D

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