From: Tvrtko Ursulin <[email protected]>
Handling of intel_iommu kernel command line option should return "true" to
indicate option is valid and so avoid logging it as unknown by the core
parsing code.
Also log unknown sub-options at the notice level to let user know of
potential typos or similar.
Signed-off-by: Tvrtko Ursulin <[email protected]>
Reported-by: Eero Tamminen <[email protected]>
Cc: Lu Baolu <[email protected]>
---
drivers/iommu/intel/iommu.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/iommu/intel/iommu.c b/drivers/iommu/intel/iommu.c
index 327f477a8553..41d163e275b2 100644
--- a/drivers/iommu/intel/iommu.c
+++ b/drivers/iommu/intel/iommu.c
@@ -463,13 +463,15 @@ static int __init intel_iommu_setup(char *str)
} else if (!strncmp(str, "tboot_noforce", 13)) {
pr_info("Intel-IOMMU: not forcing on after tboot. This could expose security risk for tboot\n");
intel_iommu_tboot_noforce = 1;
+ } else {
+ pr_notice("Unknown option - '%s'\n", str);
}
str += strcspn(str, ",");
while (*str == ',')
str++;
}
- return 0;
+ return 1;
}
__setup("intel_iommu=", intel_iommu_setup);
--
2.30.2