Merge tag 'iommu-fix-v5.2-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu
Pull iommu fix from Joerg Roedel:
"Revert a commit from the previous pile of fixes which causes new
lockdep splats. It is better to revert it for now and work on a better
and more well tested fix"
* tag 'iommu-fix-v5.2-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu:
Revert "iommu/vt-d: Fix lock inversion between iommu->lock and device_domain_lock"
diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c
index 5629729..162b3236 100644
--- a/drivers/iommu/intel-iommu.c
+++ b/drivers/iommu/intel-iommu.c
@@ -2504,7 +2504,6 @@
}
}
- spin_lock(&iommu->lock);
spin_lock_irqsave(&device_domain_lock, flags);
if (dev)
found = find_domain(dev);
@@ -2520,16 +2519,17 @@
if (found) {
spin_unlock_irqrestore(&device_domain_lock, flags);
- spin_unlock(&iommu->lock);
free_devinfo_mem(info);
/* Caller must free the original domain */
return found;
}
+ spin_lock(&iommu->lock);
ret = domain_attach_iommu(domain, iommu);
+ spin_unlock(&iommu->lock);
+
if (ret) {
spin_unlock_irqrestore(&device_domain_lock, flags);
- spin_unlock(&iommu->lock);
free_devinfo_mem(info);
return NULL;
}
@@ -2539,7 +2539,6 @@
if (dev)
dev->archdata.iommu = info;
spin_unlock_irqrestore(&device_domain_lock, flags);
- spin_unlock(&iommu->lock);
/* PASID table is mandatory for a PCI device in scalable mode. */
if (dev && dev_is_pci(dev) && sm_supported(iommu)) {
