Backported Alex Williamson's commit to 2.6.32.y http://git.kernel.org/linus/7b668357810ecb5fdda4418689d50f5d95aea6a8 It resolves the following assert when module is immediately reloaded. kernel BUG at drivers/pci/iova.c:155! <snip> Call Trace: [<ffffffff812645c5>] intel_alloc_iova+0xb5/0xe0 [<ffffffff8126725e>] __intel_map_single+0xbe/0x210 [<ffffffff812674ae>] intel_alloc_coherent+0xae/0x120 [<ffffffffa035f909>] be_queue_alloc+0xb9/0x140 [be2net] [<ffffffffa035fa5a>] be_rx_qs_create+0xca/0x370 [be2net] <snip> The issue is reproducible in 2.6.32.60 and also gets resolved by passing intel-iommu=strict to kernel. Signed-off-by: Jitendra Bhivare <jitendra.bhivare@xxxxxxxxx> --- drivers/pci/intel-iommu.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/pci/intel-iommu.c b/drivers/pci/intel-iommu.c index 5b680df..c1a7b01 100644 --- a/drivers/pci/intel-iommu.c +++ b/drivers/pci/intel-iommu.c @@ -1434,6 +1434,10 @@ static void domain_exit(struct dmar_domain *domain) if (!domain) return; + /* Flush any lazy unmaps that may reference this domain */ + if (!intel_iommu_strict) + flush_unmaps_timeout(0); + domain_remove_dev_info(domain); /* destroy iovas */ put_iova_domain(&domain->iovad); -- 1.8.4 -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html