[3.13.y.z extended stable] Patch "iio: adc: mxs-lradc: Disable the clock on probe failure" has been added to staging queue

[Kamal Mostafa]

This is a note to let you know that I have just added a patch titled

    iio: adc: mxs-lradc: Disable the clock on probe failure

to the linux-3.13.y-queue branch of the 3.13.y.z extended stable tree 
which can be found at:

 http://kernel.ubuntu.com/git?p=ubuntu/linux.git;a=shortlog;h=refs/heads/linux-3.13.y-queue

This patch is scheduled to be released in version 3.13.11.11.

If you, or anyone else, feels it should not be added to this tree, please 
reply to this email.

For more information about the 3.13.y.z tree, see
https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable

Thanks.
-Kamal

------

>From 2a895c4d1546ba7e38432c14bb30ce35b9561db4 Mon Sep 17 00:00:00 2001
From: Fabio Estevam <fabio.estevam at freescale.com>
Date: Sat, 4 Oct 2014 08:50:21 -0300
Subject: iio: adc: mxs-lradc: Disable the clock on probe failure

commit 75d7ed3b9e7cb79a3b0e1f417fb674d54b4fc668 upstream.

We should disable lradc->clk in the case of errors in the probe function.

Signed-off-by: Fabio Estevam <fabio.estevam at freescale.com>
Reviewed-by: Marek Vasut <marex at denx.de>
Signed-off-by: Jonathan Cameron <jic23 at kernel.org>
Signed-off-by: Kamal Mostafa <kamal at canonical.com>
---
 drivers/staging/iio/adc/mxs-lradc.c | 12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/drivers/staging/iio/adc/mxs-lradc.c b/drivers/staging/iio/adc/mxs-lradc.c
index cef5dde..da4f0b1 100644
--- a/drivers/staging/iio/adc/mxs-lradc.c
+++ b/drivers/staging/iio/adc/mxs-lradc.c
@@ -1307,14 +1307,16 @@ static int mxs_lradc_probe(struct platform_device *pdev)
 	/* Grab all IRQ sources */
 	for (i = 0; i < of_cfg->irq_count; i++) {
 		lradc->irq[i] = platform_get_irq(pdev, i);
-		if (lradc->irq[i] < 0)
-			return lradc->irq[i];
+		if (lradc->irq[i] < 0) {
+			ret = lradc->irq[i];
+			goto err_clk;
+		}

 		ret = devm_request_irq(dev, lradc->irq[i],
 					mxs_lradc_handle_irq, 0,
 					of_cfg->irq_name[i], iio);
 		if (ret)
-			return ret;
+			goto err_clk;
 	}

 	platform_set_drvdata(pdev, iio);
@@ -1334,7 +1336,7 @@ static int mxs_lradc_probe(struct platform_device *pdev)
 				&mxs_lradc_trigger_handler,
 				&mxs_lradc_buffer_ops);
 	if (ret)
-		return ret;
+		goto err_clk;

 	ret = mxs_lradc_trigger_init(iio);
 	if (ret)
@@ -1369,6 +1371,8 @@ err_dev:
 	mxs_lradc_trigger_remove(iio);
 err_trig:
 	iio_triggered_buffer_cleanup(iio);
+err_clk:
+	clk_disable_unprepare(lradc->clk);
 	return ret;
 }

--
1.9.1