Re: [PATCH net-next v5 1/3] net: ethernet: ti: Add accessors for struct k3_cppi_desc_pool members

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On Thu, Mar 28, 2024 at 12:06:56PM +0000, Naveen Mamindlapalli wrote:
> > diff --git a/drivers/net/ethernet/ti/k3-cppi-desc-pool.c b/drivers/net/ethernet/ti/k3-
> > cppi-desc-pool.c
> > index 05cc7aab1ec8..fe8203c05731 100644
> > --- a/drivers/net/ethernet/ti/k3-cppi-desc-pool.c
> > +++ b/drivers/net/ethernet/ti/k3-cppi-desc-pool.c
> > @@ -132,5 +132,17 @@ size_t k3_cppi_desc_pool_avail(struct
> > k3_cppi_desc_pool *pool)  }  EXPORT_SYMBOL_GPL(k3_cppi_desc_pool_avail);
> > 
> > +size_t k3_cppi_desc_pool_desc_size(struct k3_cppi_desc_pool *pool) {
> > +	return pool->desc_size;
> 
> Don't you need to add NULL check on pool ptr since this function is exported?

What bearing does exporting a function have on whether it should check
for NULL?

Given that this function returns size_t, it can't return an error
number. So what value would it return if "pool" were NULL? It can
only return a positive integer or zero.

Also, the argument should be const as the function doesn't modify the
contents of "pool".

-- 
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