Subject: [PATCH 07/15] powerpc/powernv/sriov: Rename truncate_iov

From: Oliver O'Halloran <[email-masked]>
Date: Fri, 10 Jul 2020 15:23:32 +1000

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 <[email-masked]>
---
 arch/powerpc/platforms/powernv/pci-sriov.c | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

diff --git a/arch/powerpc/platforms/powernv/pci-sriov.c b/arch/powerpc/platforms/powernv/pci-sriov.c
index f4c74ab1284d..216ceeff69b0 100644
--- 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);
@@ -170,7 +170,7 @@ static void pnv_pci_ioda_fixup_iov_resources(struct pci_dev *pdev)
 			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,
@@ -209,7 +209,8 @@ 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);
@@ -220,8 +221,8 @@ 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;
-- 
2.26.2