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sfc: Improve test for IOMMU in use

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The device::iommu_group field may be set even if no IOMMU is in use.
iommu_present() is still a better indicator, although it doesn't tell
us whether *our* device is affected.

Reported-by: Alex Williamson <alex.williamson@redhat.com>
Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
This commit is contained in:
Ben Hutchings 2013-06-12 18:09:08 +01:00
parent 1899c111a5
commit 636d73da27
1 changed files with 1 additions and 1 deletions
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drivers/net/ethernet/sfc/rx.c
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@ -677,7 +677,7 @@ static void efx_init_rx_recycle_ring(struct efx_nic *efx,
#ifdef CONFIG_PPC64
bufs_in_recycle_ring = EFX_RECYCLE_RING_SIZE_IOMMU;
#else
if (efx->pci_dev->dev.iommu_group)
if (iommu_present(&pci_bus_type))
bufs_in_recycle_ring = EFX_RECYCLE_RING_SIZE_IOMMU;
else
bufs_in_recycle_ring = EFX_RECYCLE_RING_SIZE_NOIOMMU;