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

[Luis Henriques]

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-3.16.y-queue branch of the 3.16.y-ckt extended stable tree 
which can be found at:

 http://kernel.ubuntu.com/git?p=ubuntu/linux.git;a=shortlog;h=refs/heads/linux-3.16.y-queue

This patch is scheduled to be released in version 3.16.7-ckt1.

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

For more information about the 3.16.y-ckt tree, see
https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable

Thanks.
-Luis

------

>From 0c8b33eb26c0c899f39ceda28bce4f9ac0bb2705 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: Luis Henriques <luis.henriques 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 52d7517b342e..6d500c21cc58 100644
--- a/drivers/staging/iio/adc/mxs-lradc.c
+++ b/drivers/staging/iio/adc/mxs-lradc.c
@@ -1565,14 +1565,16 @@ 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;
 	}

 	lradc->vref_mv = of_cfg->vref_mv;
@@ -1594,7 +1596,7 @@ 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)
@@ -1649,6 +1651,8 @@ err_dev:
 	mxs_lradc_trigger_remove(iio);
 err_trig:
 	iio_triggered_buffer_cleanup(iio);
+err_clk:
+	clk_disable_unprepare(lradc->clk);
 	return ret;
 }

--
2.1.0