github-mirror/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2026-05-12 16:18:45 +02:00
Code Issues Actions Packages Projects Releases Wiki Activity

iommu/amd: Fix precedence order in set_dte_passthrough()

Browse Source 
Bitwise OR | operator has a higher precedence than the ternary ?:
operatior. It will be incorrectly evaluated as:

new->data[1] |= (FIELD_PREP(...) | dev_data->ats_enabled) ? DTE_FLAG_IOTLB : 0;

Wrap the conditional operation in parentheses to enforce the
correct evaluation order.

Fixes: 93eee2a49c ("iommu/amd: Refactor logic to program the host page table in DTE")
Signed-off-by: Weinan Liu <wnliu@google.com>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Reviewed-by: Vasant Hegde <vasant.hegde@amd.com>
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
This commit is contained in:
Weinan Liu 2026-04-30 23:28:51 +00:00 committed by Joerg Roedel
parent f9471dc1a7
commit 10161b4a79
1 changed files with 2 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
drivers/iommu/amd/iommu.c
View File

@ -2149,7 +2149,8 @@ static void set_dte_passthrough(struct iommu_dev_data *dev_data,
new->data[0] |= DTE_FLAG_TV | DTE_FLAG_IR | DTE_FLAG_IW;
new->data[1] |= FIELD_PREP(DTE_DOMID_MASK, domain->id) |
(dev_data->ats_enabled) ? DTE_FLAG_IOTLB : 0;
(dev_data->ats_enabled ? DTE_FLAG_IOTLB : 0);
}
static void set_dte_entry(struct amd_iommu *iommu,