Re: [PATCH] pinctrl:sunplus: Add check for kmalloc

[andy.shevchenko@xxxxxxxxx]

Tue, May 23, 2023 at 05:39:51PM +0000, Wells Lu 呂芳騰 kirjoitti:
> > > Fix Smatch static checker warning:
> > > potential null dereference 'configs'. (kmalloc returns null)

...

> > >  			configs = kmalloc(sizeof(*configs), GFP_KERNEL);
> > > +			if (!configs)
> > 
> > > +				return -ENOMEM;
> > 
> > "Fixing" by adding a memory leak is not probably a good approach.
> 
> Do you mean I need to free all memory which are allocated in this subroutine before
> return -ENOMEM?

This is my understanding of the code. But as I said... (see below)

...

> > >  			configs = kmalloc(sizeof(*configs), GFP_KERNEL);
> > > +			if (!configs)
> > > +				return -ENOMEM;
> > 
> > Ditto.

...

> > It might be that I'm mistaken. In this case please add an explanation why in the commit
> > message.

^^^

-- 
With Best Regards,
Andy Shevchenko