On 2022/7/7 16:30, Ethan Zhao wrote:
-static int show_device_domain_translation(struct device *dev, void *data)
+static int __show_device_domain_translation(struct device *dev, void *data)
{
- struct device_domain_info *info = dev_iommu_priv_get(dev);
- struct dmar_domain *domain = info->domain;
+ struct dmar_domain *domain;
struct seq_file *m = data;
u64 path[6] = { 0 };
+ domain = to_dmar_domain(iommu_get_domain_for_dev(dev));
if (!domain)
return 0;
@@ -359,20 +359,39 @@ static int show_device_domain_translation(struct device *dev, void *data)
pgtable_walk_level(m, domain->pgd, domain->agaw + 2, 0, path);
seq_putc(m, '\n');
- return 0;
+ /* Don't iterate */
+ return 1;
}
Using this return value trick to change the caller behaviour, seems not
saving
anything, but really cost me a few seconds more to know the
*incantation* --
'Don't iterate' :) .
This is defined by iommu_group_for_each_dev(). Return value 0 means
continuing to next one, while non-zero means stopping iteration.
Best regards,
baolu
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