[PATCH 22/22] iommu/amd: Propagate errors from amd_iommu_init_api

[Joerg Roedel]

From: Joerg Roedel <jroe...@suse.de>

This function can fail. Propagate any errors back to the
initialization state machine.

Signed-off-by: Joerg Roedel <jroe...@suse.de>
---
 drivers/iommu/amd_iommu.c       | 4 ++--
 drivers/iommu/amd_iommu_init.c  | 5 +++--
 drivers/iommu/amd_iommu_proto.h | 2 +-
 3 files changed, 6 insertions(+), 5 deletions(-)

diff --git a/drivers/iommu/amd_iommu.c b/drivers/iommu/amd_iommu.c
index 6e73fa1..6659b51 100644
--- a/drivers/iommu/amd_iommu.c
+++ b/drivers/iommu/amd_iommu.c
@@ -2840,9 +2840,9 @@ static struct dma_map_ops amd_iommu_dma_ops = {
        .dma_supported = amd_iommu_dma_supported,
 };
 
-void __init amd_iommu_init_api(void)
+int __init amd_iommu_init_api(void)
 {
-       bus_set_iommu(&pci_bus_type, &amd_iommu_ops);
+       return bus_set_iommu(&pci_bus_type, &amd_iommu_ops);
 }
 
 int __init amd_iommu_init_dma_ops(void)
diff --git a/drivers/iommu/amd_iommu_init.c b/drivers/iommu/amd_iommu_init.c
index e4a6e40..dbac49c 100644
--- a/drivers/iommu/amd_iommu_init.c
+++ b/drivers/iommu/amd_iommu_init.c
@@ -1391,9 +1391,10 @@ static int __init amd_iommu_init_pci(void)
        for_each_iommu(iommu)
                iommu_flush_all_caches(iommu);
 
-       amd_iommu_init_api();
+       ret = amd_iommu_init_api();
 
-       print_iommu_info();
+       if (!ret)
+               print_iommu_info();
 
        return ret;
 }
diff --git a/drivers/iommu/amd_iommu_proto.h b/drivers/iommu/amd_iommu_proto.h
index 72b0fd4..9ed1c43 100644
--- a/drivers/iommu/amd_iommu_proto.h
+++ b/drivers/iommu/amd_iommu_proto.h
@@ -30,7 +30,7 @@ extern void amd_iommu_reset_cmd_buffer(struct amd_iommu 
*iommu);
 extern int amd_iommu_init_devices(void);
 extern void amd_iommu_uninit_devices(void);
 extern void amd_iommu_init_notifier(void);
-extern void amd_iommu_init_api(void);
+extern int amd_iommu_init_api(void);
 
 /* Needed for interrupt remapping */
 extern int amd_iommu_prepare(void);
-- 
1.9.1

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