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authorSricharan R <sricharan@codeaurora.org>2017-05-27 15:47:40 +0200
committerJoerg Roedel <jroedel@suse.de>2017-05-30 11:31:32 +0200
commit573d41757c47cb71cd572236685d4c9e6cacc06c (patch)
tree4c0ece8d43dba4d066eb2ca7af5e904739a4e985 /drivers/iommu/of_iommu.c
parentiommu/dma: Fix function declaration (diff)
downloadlinux-573d41757c47cb71cd572236685d4c9e6cacc06c.tar.xz
linux-573d41757c47cb71cd572236685d4c9e6cacc06c.zip
iommu/of: Fix check for returning EPROBE_DEFER
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") Reported-by: Geert Uytterhoeven <geert@linux-m68k.org> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Tested-by: Will Deacon <will.deacon@arm.com> Tested-by: Magnus Damn <magnus.damn@gmail.com> Acked-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Sricharan R <sricharan@codeaurora.org> Signed-off-by: Joerg Roedel <jroedel@suse.de>
Diffstat (limited to 'drivers/iommu/of_iommu.c')
-rw-r--r--drivers/iommu/of_iommu.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/iommu/of_iommu.c b/drivers/iommu/of_iommu.c
index 9f44ee8ea1bc..e6e9bec42e5f 100644
--- a/drivers/iommu/of_iommu.c
+++ b/drivers/iommu/of_iommu.c
@@ -118,6 +118,7 @@ static const struct iommu_ops
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;