[PATCH] iommu/vt-d: Fix panic accessing amd_iommu_enable_faulting

Dimitri Sivanich
2024-05-30T13:52:18Z

This fixes a bug introduced by commit d74169ceb0d2 ("iommu/vt-d: Allocate
DMAR fault interrupts locally"). The panic happens when
amd_iommu_enable_faulting is called from CPUHP_AP_ONLINE_DYN context.

Signed-off-by: Dimitri Sivanich <sivanich@hpe.com>
Tested-by: Yi Zhang <yi.zhang@redhat.com>
---
drivers/iommu/amd/init.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/iommu/amd/init.c b/drivers/iommu/amd/init.c
index a18e74878f68..b02b959d12af 100644
--- a/drivers/iommu/amd/init.c
+++ b/drivers/iommu/amd/init.c
@@ -3353,7 +3353,7 @@ int amd_iommu_reenable(int mode)
return 0;
}

-int __init amd_iommu_enable_faulting(unsigned int cpu)
+int amd_iommu_enable_faulting(unsigned int cpu)
{
/* We enable MSI later when PCI is initialized */
return 0;
--
2.35.3