On 2025-03-11 6:42 pm, Joerg Roedel wrote:
Hi Robin,
On Fri, Feb 28, 2025 at 03:46:33PM +0000, Robin Murphy wrote:
+ /*
+ * And if we do now see any replay calls, they would indicate someone
+ * misusing the dma_configure path outside bus code.
+ */
+ if (dev->driver)
+ dev_WARN(dev, "late IOMMU probe at driver bind, something fishy here!\n");
This warning triggers on my workstation (with an AMD IOMMU), any ideas?
Argh! When I moved the dma_configure call into iommu_init_device() for
v2 I moved the warning with it, but of course that needs to stay where
it was, *after* the point that ops->probe_device has had a chance to
filter out irrelevant devices. Does this make it behave?
Thanks,
Robin.
----->8-----
diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c
index 09798ddbce9d..1da6c55a0d02 100644
--- a/drivers/iommu/iommu.c
+++ b/drivers/iommu/iommu.c
@@ -437,12 +437,6 @@ static int iommu_init_device(struct device *dev)
ret = -ENODEV;
goto err_free;
}
- /*
- * And if we do now see any replay calls, they would indicate someone
- * misusing the dma_configure path outside bus code.
- */
- if (dev->driver)
- dev_WARN(dev, "late IOMMU probe at driver bind, something fishy here!\n");
if (!try_module_get(ops->owner)) {
ret = -EINVAL;
@@ -565,6 +559,12 @@ static int __iommu_probe_device(struct device *dev, struct list_head *group_list
ret = iommu_init_device(dev);
if (ret)
return ret;
+ /*
+ * And if we do now see any replay calls, they would indicate someone
+ * misusing the dma_configure path outside bus code.
+ */
+ if (dev->driver)
+ dev_WARN(dev, "late IOMMU probe at driver bind, something fishy here!\n");
group = dev->iommu_group;
gdev = iommu_group_alloc_device(group, dev);
