Re: [PATCH v2 3/5] soc: qcom: smem: Support global partition

[Chris Lew]

On 9/15/2017 11:33 AM, Bjorn Andersson wrote:
> On Thu 14 Sep 14:25 PDT 2017, Chris Lew wrote:
>
> [..]
> > +static struct smem_ptable *qcom_smem_get_ptable(struct qcom_smem *smem)
> >   {
> > -	struct smem_partition_header *header;
> > -	struct smem_ptable_entry *entry;
> >   	struct smem_ptable *ptable;
> > -	unsigned remote_host;
> > -	u32 version, host0, host1;
> > -	int i;
> > +	u32 version;
> >   
> >   	ptable = smem->regions[0].virt_base + smem->regions[0].size - SZ_4K;
> >   	if (memcmp(ptable->magic, SMEM_PTABLE_MAGIC, sizeof(ptable->magic)))
> > -		return 0;
> > +		return NULL;
> >   
> >   	version = le32_to_cpu(ptable->version);
> >   	if (version != 1) {
> >   		dev_err(smem->dev,
> >   			"Unsupported partition header version %d\n", version);
> > +		return ERR_PTR(-EINVAL);
>
> In the calling places NULL and -EINVAL are both treated as -EINVAL, so I
> think it's better to just return NULL here as well as check for !ptable
> in callers.
>
> Regards,
> Bjorn

qcom_smem_enumerate_partitions allowed the partition table to be 
optional before. I want to keep that behavior for V11 where smem might 
only have the global heap. The probe will continue with a NULL/0 return 
from qcom_get_ptable/qcom_smem_enumerate_partitions.

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