Hi Vadim,
Could you please take a look at this and give advice to Kunwu so we can
get all of them squashed in one go.
On Thu, 30 Nov 2023, Kunwu Chan wrote:
> Thanks for your reply.
>
> Cause i don't know how to deal with in some scenario，such as in
> 'mlxbf_pmc_init_perftype_counter', when 'attr->dev_attr.attr.name' is null,
> should return '-ENOMEM' or 'continue' the loop?
I'd have thought returning -ENOMEM would be safe because it just ends up
failing probe()? ...And it's not that likely to occur in the first place.
--
i.
>
> So I'm going to solve it one by one.
>
> Thanks again,
> Kunwu
>
> On 2023/11/28 17:51, Ilpo Järvinen wrote:
> > On Mon, 27 Nov 2023, Kunwu Chan wrote:
> >
> > > devm_kasprintf() returns a pointer to dynamically allocated memory
> > > which can be NULL upon failure.
> > >
> > > Fixes: 1a218d312e65 ("platform/mellanox: mlxbf-pmc: Add Mellanox BlueField
> > > PMC driver")
> > > Signed-off-by: Kunwu Chan <chentao@xxxxxxxxxx>
> > > ---
> > > drivers/platform/mellanox/mlxbf-pmc.c | 2 ++
> > > 1 file changed, 2 insertions(+)
> > >
> > > diff --git a/drivers/platform/mellanox/mlxbf-pmc.c
> > > b/drivers/platform/mellanox/mlxbf-pmc.c
> > > index 0b427fc24a96..59bbe5e13f6b 100644
> > > --- a/drivers/platform/mellanox/mlxbf-pmc.c
> > > +++ b/drivers/platform/mellanox/mlxbf-pmc.c
> > > @@ -1882,6 +1882,8 @@ static int mlxbf_pmc_create_groups(struct device
> > > *dev, int blk_num)
> > > pmc->block[blk_num].block_attr_grp.attrs =
> > > pmc->block[blk_num].block_attr;
> > > pmc->block[blk_num].block_attr_grp.name = devm_kasprintf(
> > > dev, GFP_KERNEL, pmc->block_name[blk_num]);
> > > + if (!pmc->block[blk_num].block_attr_grp.name)
> > > + return -ENOMEM;
> > > pmc->groups[pmc->group_num] = &pmc->block[blk_num].block_attr_grp;
> > > pmc->group_num++;
> >
> > I'm totally lost, why did you fix only one devm_kasprintf() location?
> > Don't all of them need this check?
> >
>
