Hi Sricharan, Thank you for the patch. On Thursday 18 May 2017 15:37:08 Sricharan R wrote: > Now with IOMMU probe deferral, we return -EPROBE_DEFER > for masters that are connected to an IOMMU which is not > probed yet, but going to get probed, so that we can attach > the correct dma_ops. So while trying to defer the probe of > the master, check if the of_iommu node that it is connected > to is marked in DT as 'status=disabled', then the IOMMU is never > is going to get probed. So simply return NULL and let the master > work without an IOMMU. > > Fixes: 7b07cbefb68d ("iommu: of: Handle IOMMU lookup failure with deferred > probing or error") Signed-off-by: Sricharan R <sricharan@xxxxxxxxxxxxxx> > Reported-by: Geert Uytterhoeven <geert@xxxxxxxxxxxxxx> > Tested-by: Will Deacon <will.deacon@xxxxxxx> > Tested-by: Magnus Damn <magnus.damn@xxxxxxxxx> > Acked-by: Will Deacon <will.deacon@xxxxxxx> Reviewed-by: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx> > --- > [V2] Corrected spelling/case in commit log > > drivers/iommu/of_iommu.c | 1 + > 1 file changed, 1 insertion(+) > > diff --git a/drivers/iommu/of_iommu.c b/drivers/iommu/of_iommu.c > index 9f44ee8..e6e9bec 100644 > --- a/drivers/iommu/of_iommu.c > +++ b/drivers/iommu/of_iommu.c > @@ -118,6 +118,7 @@ static bool of_iommu_driver_present(struct device_node > *np) > > ops = iommu_ops_from_fwnode(fwnode); > if ((ops && !ops->of_xlate) || > + !of_device_is_available(iommu_spec->np) || > (!ops && !of_iommu_driver_present(iommu_spec->np))) > return NULL; -- Regards, Laurent Pinchart -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html