On Tuesday, 28. January 2014 14:16:39 Manish Badarkhe wrote:
> Hi Heiko
>
> Thank you for your reply.
>
> On Tue, Jan 28, 2014 at 1:08 PM, Heiko Stübner <heiko@xxxxxxxxx> wrote:
> > On Tuesday, 28. January 2014 12:46:01 Manish Badarkhe wrote:
> >> Hi Dmitry,
> >>
> >> Thank you for your review.
> >>
> >> On Tue, Jan 28, 2014 at 12:03 PM, Dmitry Torokhov
> >>
> >> <dmitry.torokhov@xxxxxxxxx> wrote:
> >> > Hi Manish,
> >> >
> >> > On Tue, Jan 28, 2014 at 08:42:00AM +0530, Manish Badarkhe wrote:
> >> >> Update the code to use devm_* API so that driver core will manage
> >> >> resources.
> >> >>
> >> >> Signed-off-by: Manish Badarkhe <badarkhe.manish@xxxxxxxxx>
> >> >> ---
> >> >> Changes since V1:
> >> >> 1. Updated driver to use "devm_kzalloc" to "kstrdup".
> >> >> 2. Updated commit message.
> >> >>
> >> >> Not tested on any board.
> >> >>
> >> >> :100644 100644 5ea64b9... e9763a4... M
> >> >> :drivers/regulator/fixed.c
> >> >> :
> >> >> drivers/regulator/fixed.c | 42
> >> >> ++++++++++++------------------------------
> >> >> 1 file changed, 12 insertions(+), 30 deletions(-)
> >> >>
> >> >> diff --git a/drivers/regulator/fixed.c b/drivers/regulator/fixed.c
> >> >> index 5ea64b9..e9763a4 100644
> >> >> --- a/drivers/regulator/fixed.c
> >> >> +++ b/drivers/regulator/fixed.c
> >> >> @@ -132,15 +132,15 @@ static int reg_fixed_voltage_probe(struct
> >> >> platform_device *pdev)>>
> >> >>
> >> >> GFP_KERNEL);
> >> >>
> >> >> if (drvdata == NULL) {
> >> >>
> >> >> dev_err(&pdev->dev, "Failed to allocate device data\n");
> >> >>
> >> >> - ret = -ENOMEM;
> >> >> - goto err;
> >> >> + return -ENOMEM;
> >> >>
> >> >> }
> >> >>
> >> >> - drvdata->desc.name = kstrdup(config->supply_name, GFP_KERNEL);
> >> >> + drvdata->desc.name = devm_kzalloc(&pdev->dev,
> >> >> + strlen(config->supply_name) +
> >> >> 1,
> >> >> + GFP_KERNEL);
> >> >>
> >> >> if (drvdata->desc.name == NULL) {
> >> >>
> >> >> dev_err(&pdev->dev, "Failed to allocate supply name\n");
> >> >>
> >> >> - ret = -ENOMEM;
> >> >> - goto err;
> >> >> + return -ENOMEM;
> >> >>
> >> >> }
> >> >
> >> > Umm, I am fairly certain that devm_kzalloc() can't be used as a
> >> > substitute for kstrdup, at least not without accompanying memcpy.
> >>
> >> Yes, I have provided allocation but it should be followed with
> >> assignment.
> >> Can I modify like this,
> >>
> >> + drvdata->desc.name = devm_kzalloc(&pdev->dev,
> >> + strlen(config->supply_name) + 1,
> >> + GFP_KERNEL);
> >> + if (drvdata->desc.name)
> >> + sprintf(drvdata->desc.name, "%s", config->supply_name);
> >
> > hmm, so you replaced a general helper function by open coding the string-
> > duplication. Doesn't this defeat the target of simplifying the code?
>
> Intention here, is to use devm_ API and to adopt this I have to do these
> modifications for "kstrdup" functions. I have seen in regulator folder
> almost all drivers adopted to "devm_" API. Hence same thing I am following
> to update this driver. Please let me know whether to go ahead with this
> patch or retain driver as it is.
I don't have a strong opinion on this and others are most likely more qualified
to have a definitive answer, I just found it strange to exchange one open-coded
pattern against another open-coded one.
So don't let me keep you from it ;-)
Heiko
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