tree 3904396e2a4e54668f2ec3e4115fcb83d990459b
parent a37b19a384914c60b7e1264a6c21e7bf96b637e8
author Sricharan R <sricharan@codeaurora.org> 1495892862 +0530
committer Joerg Roedel <jroedel@suse.de> 1496136692 +0200

ACPI/IORT: Ignore all errors except EPROBE_DEFER

While deferring the probe of IOMMU masters, xlate and
add_device callbacks called from iort_iommu_configure
can pass back error values like -ENODEV, which means
the IOMMU cannot be connected with that master for real
reasons. Before the IOMMU probe deferral, all such errors
were ignored. Now all those errors are propagated back,
killing the master's probe for such errors. Instead ignore
all the errors except EPROBE_DEFER, which is the only one
of concern and let the master work without IOMMU, thus
restoring the old behavior. Also make explicit that
acpi_dma_configure handles only -EPROBE_DEFER from
iort_iommu_configure.

Fixes: 5a1bb638d567 ("drivers: acpi: Handle IOMMU lookup failure with deferred probing or error")
Signed-off-by: Sricharan R <sricharan@codeaurora.org>
Signed-off-by: Joerg Roedel <jroedel@suse.de>