On 2022/4/14 20:42, Robin Murphy wrote:
@@ -1883,27 +1900,12 @@ static int iommu_bus_init(struct bus_type *bus)
*/
int bus_set_iommu(struct bus_type *bus, const struct iommu_ops *ops)
{
- int err;
-
- if (ops == NULL) {
- bus->iommu_ops = NULL;
- return 0;
- }
-
- if (bus->iommu_ops != NULL)
+ if (bus->iommu_ops && ops && bus->iommu_ops != ops)
return -EBUSY;
bus->iommu_ops = ops;
Do we still need to keep above lines in bus_set_iommu()?
Best regards,
baolu
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