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| author | Sricharan R <sricharan@codeaurora.org> | 2017-05-27 19:17:40 +0530 |
|---|---|---|
| committer | Joerg Roedel <jroedel@suse.de> | 2017-05-30 11:31:32 +0200 |
| commit | 573d41757c47cb71cd572236685d4c9e6cacc06c (patch) | |
| tree | 4c0ece8d43dba4d066eb2ca7af5e904739a4e985 /drivers/iommu | |
| parent | 4b1c88984c8ac894c2c411570757bed7fa5f3226 (diff) | |
| download | linux-573d41757c47cb71cd572236685d4c9e6cacc06c.tar.gz linux-573d41757c47cb71cd572236685d4c9e6cacc06c.tar.bz2 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')
| -rw-r--r-- | drivers/iommu/of_iommu.c | 1 |
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; |