static int modify_irte_ga(struct amd_iommu *iommu, u16 devid, int index,
struct irte_ga *irte, struct amd_ir_data *data)
{
- bool ret;
struct irq_remap_table *table;
- unsigned long flags;
struct irte_ga *entry;
+ unsigned long flags;
+ u128 old;
table = get_irq_table(iommu, devid);
if (!table)
entry = (struct irte_ga *)table->table;
entry = &entry[index];
- ret = cmpxchg_double(&entry->lo.val, &entry->hi.val,
- entry->lo.val, entry->hi.val,
- irte->lo.val, irte->hi.val);
/*
* We use cmpxchg16 to atomically update the 128-bit IRTE,
* and it cannot be updated by the hardware or other processors
* behind us, so the return value of cmpxchg16 should be the
* same as the old value.
*/
- WARN_ON(!ret);
+ old = entry->irte;
+ WARN_ON(!try_cmpxchg128(&entry->irte, &old, irte->irte));
if (data)
data->ref = entry;