powerpc/powernv/sriov: Rename truncate_iov

This prevents SR-IOV being used by making the SR-IOV BAR resources
unallocatable. Rename it to reflect what it actually does.

Signed-off-by: Oliver O'Halloran <oohall@gmail.com>
Reviewed-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20200722065715.1432738-7-oohall@gmail.com

diff --git a/arch/powerpc/platforms/powernv/pci-sriov.c b/arch/powerpc/platforms/powernv/pci-sriov.c
index 8f5f0f5..10ebdf0 100644 (file)
--- a/arch/powerpc/platforms/powernv/pci-sriov.c
+++ b/arch/powerpc/platforms/powernv/pci-sriov.c
@@ -155,7 +155,7 @@ static void pnv_pci_ioda_fixup_iov_resources(struct pci_dev *pdev)
 
        iov = kzalloc(sizeof(*iov), GFP_KERNEL);
        if (!iov)
-               goto truncate_iov;
+               goto disable_iov;
        pdev->dev.archdata.iov_data = iov;
 
        total_vfs = pci_sriov_get_totalvfs(pdev);
@@ -169,7 +169,7 @@ static void pnv_pci_ioda_fixup_iov_resources(struct pci_dev *pdev)
                if (!pnv_pci_is_m64_flags(res->flags)) {
                        dev_warn(&pdev->dev, "Don't support SR-IOV with non M64 VF BAR%d: %pR. \n",
                                 i, res);
-                       goto truncate_iov;
+                       goto disable_iov;
                }
 
                total_vf_bar_sz += pci_iov_resource_size(pdev,
@@ -208,7 +208,8 @@ static void pnv_pci_ioda_fixup_iov_resources(struct pci_dev *pdev)
                 * mode is 32MB.
                 */
                if (iov->m64_single_mode && (size < SZ_32M))
-                       goto truncate_iov;
+                       goto disable_iov;
+
                dev_dbg(&pdev->dev, " Fixing VF BAR%d: %pR to\n", i, res);
                res->end = res->start + size * mul - 1;
                dev_dbg(&pdev->dev, "                       %pR\n", res);
@@ -219,8 +220,8 @@ static void pnv_pci_ioda_fixup_iov_resources(struct pci_dev *pdev)
 
        return;
 
-truncate_iov:
-       /* To save MMIO space, IOV BAR is truncated. */
+disable_iov:
+       /* Save ourselves some MMIO space by disabling the unusable BARs */
        for (i = 0; i < PCI_SRIOV_NUM_BARS; i++) {
                res = &pdev->resource[i + PCI_IOV_RESOURCES];
                res->flags = 0;