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authorSricharan R <sricharan@codeaurora.org>2017-05-27 16:47:42 +0300
committerJoerg Roedel <jroedel@suse.de>2017-05-30 12:31:32 +0300
commit058f8c3fb44d028ba44c2e3635d8bee9787018d6 (patch)
tree3904396e2a4e54668f2ec3e4115fcb83d990459b /drivers/acpi/scan.c
parenta37b19a384914c60b7e1264a6c21e7bf96b637e8 (diff)
downloadlinux-058f8c3fb44d028ba44c2e3635d8bee9787018d6.tar.xz
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>
Diffstat (limited to 'drivers/acpi/scan.c')
-rw-r--r--drivers/acpi/scan.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c
index e39ec7b7cb67..3a10d7573477 100644
--- a/drivers/acpi/scan.c
+++ b/drivers/acpi/scan.c
@@ -1371,8 +1371,8 @@ int acpi_dma_configure(struct device *dev, enum dev_dma_attr attr)
iort_set_dma_mask(dev);
iommu = iort_iommu_configure(dev);
- if (IS_ERR(iommu))
- return PTR_ERR(iommu);
+ if (IS_ERR(iommu) && PTR_ERR(iommu) == -EPROBE_DEFER)
+ return -EPROBE_DEFER;
size = max(dev->coherent_dma_mask, dev->coherent_dma_mask + 1);
/*