diff options
| author | Dan Carpenter <dan.carpenter@oracle.com> | 2015-10-15 21:25:15 +0300 |
|---|---|---|
| committer | David Woodhouse <David.Woodhouse@intel.com> | 2015-10-15 21:16:47 +0100 |
| commit | 95fb6144bb2222b4c0189e76c1aae006b0a02bff (patch) | |
| tree | c0f5ba55cf649ac9af3ace42fe2432c549d13b76 | |
| parent | 26322ab55aa90717c7e4bdbd8cf60a70854636f5 (diff) | |
iommu/vt-d: shift wrapping bug in prq_event_thread()
The "req->addr" variable is a bit field declared as "u64 addr:52;".
The "address" variable is a u64. We need to cast "req->addr" to a u64
before the shift or the result is truncated to 52 bits.
Fixes: a222a7f0bb6c ('iommu/vt-d: Implement page request handling')
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
| -rw-r--r-- | drivers/iommu/intel-svm.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/iommu/intel-svm.c b/drivers/iommu/intel-svm.c index b7e923aae4d8..99a78030857b 100644 --- a/drivers/iommu/intel-svm.c +++ b/drivers/iommu/intel-svm.c @@ -490,7 +490,7 @@ static irqreturn_t prq_event_thread(int irq, void *d) req = &iommu->prq[head / sizeof(*req)]; result = QI_RESP_FAILURE; - address = req->addr << PAGE_SHIFT; + address = (u64)req->addr << PAGE_SHIFT; if (!req->pasid_present) { pr_err("%s: Page request without PASID: %08llx %08llx\n", iommu->name, ((unsigned long long *)req)[0], |