On Tue, 2013-03-12 at 15:44 -0700, Greg Kroah-Hartman wrote: > 3.0-stable review patch. If anyone has any objections, please let me know. > > ------------------ > > From: Mark Brown <broo...@opensource.wolfsonmicro.com> > > commit 3e78080f81481aa8340374d5a37ae033c1cf4272 upstream. > > Not having power is a pretty serious error so check that we are able to > enable the supply and error out if we can't. > > Signed-off-by: Mark Brown <broo...@opensource.wolfsonmicro.com> > Signed-off-by: Guenter Roeck <li...@roeck-us.net>
> ---
> drivers/hwmon/sht15.c | 8 +++++++-
> 1 file changed, 7 insertions(+), 1 deletion(-)
>
> --- a/drivers/hwmon/sht15.c
> +++ b/drivers/hwmon/sht15.c
> @@ -926,7 +926,13 @@ static int __devinit sht15_probe(struct
> if (voltage)
> data->supply_uV = voltage;
>
> - regulator_enable(data->reg);
> + ret = regulator_enable(data->reg);
> + if (ret != 0) {
> + dev_err(&pdev->dev,
> + "failed to enable regulator: %d\n", ret);
> + return ret;
> + }
> +
> /*
> * Setup a notifier block to update this if another device
> * causes the voltage to change
Since this has now been released, I think you need this follow-up fix in
3.0.y and 3.4.y:
---
From: Ben Hutchings <b...@decadent.org.uk>
Subject: hwmon: sht15: Fix memory leak if regulator_enable() fails
Date: Sat, 16 Mar 2013 04:11:01 +0000
Commit 3e78080f8148 ('hwmon: (sht15) Check return value of
regulator_enable()') depends on the use of devm_kmalloc() for automatic
resource cleanup in the failure cases, which was introduced in 3.7. In
older stable branches, explicit cleanup is needed.
Signed-off-by: Ben Hutchings <b...@decadent.org.uk>
---
--- a/drivers/hwmon/sht15.c
+++ b/drivers/hwmon/sht15.c
@@ -930,7 +930,7 @@
if (ret != 0) {
dev_err(&pdev->dev,
"failed to enable regulator: %d\n", ret);
- return ret;
+ goto err_free_data;
}
/*
--
Ben Hutchings
It is easier to change the specification to fit the program than vice versa.
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