On Tue, Sep 29, 2020 at 07:06:37AM +0300, Dmitry Osipenko wrote:
> ...
> >> As I mentioned in another reply, I think tegra_smmu_find() should be all
> >> you need in this case.
> >
> > This function is used by .probe_device() where its dev pointer is
> > an SMMU client. IIUC, tegra_smmu_find()
...
>> As I mentioned in another reply, I think tegra_smmu_find() should be all
>> you need in this case.
>
> This function is used by .probe_device() where its dev pointer is
> an SMMU client. IIUC, tegra_smmu_find() needs np pointer of "mc".
> For a PCI device that doesn't have a DT node with
On Mon, Sep 28, 2020 at 09:52:12AM +0200, Thierry Reding wrote:
> On Sat, Sep 26, 2020 at 01:07:17AM -0700, Nicolin Chen wrote:
> > @@ -13,6 +13,7 @@
> > #include
> > #include
> > #include
> > +#include
>
> Why is this needed? I don't see any of the symbols declared in that file
> used
On Sat, Sep 26, 2020 at 01:07:17AM -0700, Nicolin Chen wrote:
> The tegra_smmu_probe_device() function searches in DT for the iommu
> phandler to get "smmu" pointer. This works for most of SMMU clients
> that exist in the DTB. But a PCI device will not be added to iommu,
> since it doesn't have a
On Sat, Sep 26, 2020 at 05:48:17PM +0300, Dmitry Osipenko wrote:
> 26.09.2020 11:07, Nicolin Chen пишет:
> ...
> > + /* NULL smmu pointer means that SMMU driver is not probed yet */
> > + if (unlikely(!smmu))
> > + return ERR_PTR(-EPROBE_DEFER);
>
> Hello, Nicolin!
>
> Please don't
Hi Dmitry,
Thank you for the review and comments!
On Sat, Sep 26, 2020 at 05:48:17PM +0300, Dmitry Osipenko wrote:
> 26.09.2020 11:07, Nicolin Chen пишет:
> ...
> > + /* NULL smmu pointer means that SMMU driver is not probed yet */
> > + if (unlikely(!smmu))
> > + return
26.09.2020 11:07, Nicolin Chen пишет:
...
> + /* NULL smmu pointer means that SMMU driver is not probed yet */
> + if (unlikely(!smmu))
> + return ERR_PTR(-EPROBE_DEFER);
Hello, Nicolin!
Please don't pollute code with likely/unlikely. This is not a
performance-critical code.
The tegra_smmu_probe_device() function searches in DT for the iommu
phandler to get "smmu" pointer. This works for most of SMMU clients
that exist in the DTB. But a PCI device will not be added to iommu,
since it doesn't have a DT node.
Fortunately, for a client with a DT node,
