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iommu/vt-d: Fix buggy QAT device mask

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Impacted QAT device IDs that need extra dtlb flush quirk is ranging
from 0x4940 to 0x4943. After bitwise AND device ID with 0xfffc the
result should be 0x4940 instead of 0x494c to identify these devices.

Fixes: e65a6897be ("iommu/vt-d: Add a fix for devices need extra dtlb flush")
Reported-by: Raghunathan Srinivasan <raghunathan.srinivasan@intel.com>
Signed-off-by: Ashok Raj <ashok.raj@intel.com>
Signed-off-by: Jacob Pan <jacob.jun.pan@linux.intel.com>
Link: https://lore.kernel.org/r/20221203005610.2927487-1-jacob.jun.pan@linux.intel.com
Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
This commit is contained in:
Jacob Pan 2022-12-05 21:14:12 +08:00 committed by Joerg Roedel
parent 76dcd734ec
commit 81c95fbaeb
1 changed files with 1 additions and 1 deletions
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2
drivers/iommu/intel/iommu.c
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@ -1402,7 +1402,7 @@ static void domain_update_iotlb(struct dmar_domain *domain)
* check because it applies only to the built-in QAT devices and it doesn't
* grant additional privileges.
*/
#define BUGGY_QAT_DEVID_MASK 0x494c
#define BUGGY_QAT_DEVID_MASK 0x4940
static bool dev_needs_extra_dtlb_flush(struct pci_dev *pdev)
{
if (pdev->vendor != PCI_VENDOR_ID_INTEL)