diff options
| -rw-r--r-- | drivers/iommu/iommu.c | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c index 9d728800a862..ee9c62150b56 100644 --- a/drivers/iommu/iommu.c +++ b/drivers/iommu/iommu.c @@ -422,13 +422,15 @@ static int iommu_init_device(struct device *dev) * is buried in the bus dma_configure path. Properly unpicking that is * still a big job, so for now just invoke the whole thing. The device * already having a driver bound means dma_configure has already run and - * either found no IOMMU to wait for, or we're in its replay call right - * now, so either way there's no point calling it again. + * found no IOMMU to wait for, so there's no point calling it again. */ - if (!dev->driver && dev->bus->dma_configure) { + if (!dev->iommu->fwspec && !dev->driver && dev->bus->dma_configure) { mutex_unlock(&iommu_probe_device_lock); dev->bus->dma_configure(dev); mutex_lock(&iommu_probe_device_lock); + /* If another instance finished the job for us, skip it */ + if (!dev->iommu || dev->iommu_group) + return -ENODEV; } /* * At this point, relevant devices either now have a fwspec which will |