iommu/vt-d: Fix unused invalidation hint in qi_desc_iotlb

[ Upstream commit 6b38a108eeb3936b21643191db535a35dd7c890b ]

Invalidation hint (ih) in the function 'qi_desc_iotlb' is initialized
to zero and never used. It is embedded in the 0th bit of the 'addr'
parameter. Get the correct 'ih' value from there.

Fixes: f701c9f36bcb ("iommu/vt-d: Factor out invalidation descriptor composition")
Signed-off-by: Aashish Sharma <aashish@aashishsharma.net>
Link: https://lore.kernel.org/r/20251009010903.1323979-1-aashish@aashishsharma.net
Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/iommu/intel/iommu.h b/drivers/iommu/intel/iommu.h
index df24a62e8ca40d0a0889c5f2a75913cfb31ab52f..5b5f57d694afd42e4ccd4ccb322d80b5e993231a 100644 (file)
--- a/drivers/iommu/intel/iommu.h
+++ b/drivers/iommu/intel/iommu.h
@@ -1088,7 +1088,7 @@ static inline void qi_desc_iotlb(struct intel_iommu *iommu, u16 did, u64 addr,
                                 struct qi_desc *desc)
 {
        u8 dw = 0, dr = 0;
-       int ih = 0;
+       int ih = addr & 1;
 
        if (cap_write_drain(iommu->cap))
                dw = 1;