diff options
| author | Joerg Roedel <joro@8bytes.org> | 2013-03-26 22:48:23 +0100 |
|---|---|---|
| committer | Xavier Boudet <x-boudet@ti.com> | 2013-04-08 08:25:11 +0200 |
| commit | 29e96f7b79802a8dd09b4034a54dbbeb95c1660f (patch) | |
| tree | c9a9362134d69ced9c20c105830770f08bed3628 /drivers/iommu | |
| parent | 93b4f09b2f9933966276a4fb5542a7ced40ecb68 (diff) | |
iommu/amd: Make sure dma_ops are set for hotplug devices
commit c2a2876e863356b092967ea62bebdb4dd663af80 upstream.
There is a bug introduced with commit 27c2127 that causes
devices which are hot unplugged and then hot-replugged to
not have per-device dma_ops set. This causes these devices
to not function correctly. Fixed with this patch.
Reported-by: Andreas Degert <andreas.degert@googlemail.com>
Signed-off-by: Joerg Roedel <joro@8bytes.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/iommu')
| -rw-r--r-- | drivers/iommu/amd_iommu.c | 22 |
1 files changed, 10 insertions, 12 deletions
diff --git a/drivers/iommu/amd_iommu.c b/drivers/iommu/amd_iommu.c index 57ed244cf990..0569843756e5 100644 --- a/drivers/iommu/amd_iommu.c +++ b/drivers/iommu/amd_iommu.c @@ -2270,18 +2270,16 @@ static int device_change_notifier(struct notifier_block *nb, /* allocate a protection domain if a device is added */ dma_domain = find_protection_domain(devid); - if (dma_domain) - goto out; - dma_domain = dma_ops_domain_alloc(); - if (!dma_domain) - goto out; - dma_domain->target_dev = devid; - - spin_lock_irqsave(&iommu_pd_list_lock, flags); - list_add_tail(&dma_domain->list, &iommu_pd_list); - spin_unlock_irqrestore(&iommu_pd_list_lock, flags); - - dev_data = get_dev_data(dev); + if (!dma_domain) { + dma_domain = dma_ops_domain_alloc(); + if (!dma_domain) + goto out; + dma_domain->target_dev = devid; + + spin_lock_irqsave(&iommu_pd_list_lock, flags); + list_add_tail(&dma_domain->list, &iommu_pd_list); + spin_unlock_irqrestore(&iommu_pd_list_lock, flags); + } dev->archdata.dma_ops = &amd_iommu_dma_ops; |