iommu/amd: Propagate errors from amd_iommu_init_api

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

Signed-off-by: Joerg Roedel <jroedel@suse.de>

diff --git a/drivers/iommu/amd_iommu.c b/drivers/iommu/amd_iommu.c
index 96390b9..8bc6f40 100644 (file)
--- 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 (file)
--- 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 (file)
--- 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);