diff options
| -rw-r--r-- | arch/s390/pci/pci.c | 3 | ||||
| -rw-r--r-- | drivers/pci/iov.c | 48 | ||||
| -rw-r--r-- | include/linux/pci.h | 1 |
3 files changed, 40 insertions, 12 deletions
diff --git a/arch/s390/pci/pci.c b/arch/s390/pci/pci.c index 9f6f392a4461..4266a4de3160 100644 --- a/arch/s390/pci/pci.c +++ b/arch/s390/pci/pci.c @@ -651,6 +651,9 @@ int pcibios_add_device(struct pci_dev *pdev) struct resource *res; int i; + if (pdev->is_physfn) + pdev->no_vf_scan = 1; + pdev->dev.groups = zpci_attr_groups; pdev->dev.dma_ops = &s390_pci_dma_ops; zpci_map_resources(pdev); diff --git a/drivers/pci/iov.c b/drivers/pci/iov.c index 9616eca3182f..3aa115ed3a65 100644 --- a/drivers/pci/iov.c +++ b/drivers/pci/iov.c @@ -252,6 +252,27 @@ int __weak pcibios_sriov_disable(struct pci_dev *pdev) return 0; } +static int sriov_add_vfs(struct pci_dev *dev, u16 num_vfs) +{ + unsigned int i; + int rc; + + if (dev->no_vf_scan) + return 0; + + for (i = 0; i < num_vfs; i++) { + rc = pci_iov_add_virtfn(dev, i); + if (rc) + goto failed; + } + return 0; +failed: + while (i--) + pci_iov_remove_virtfn(dev, i); + + return rc; +} + static int sriov_enable(struct pci_dev *dev, int nr_virtfn) { int rc; @@ -337,21 +358,15 @@ static int sriov_enable(struct pci_dev *dev, int nr_virtfn) msleep(100); pci_cfg_access_unlock(dev); - for (i = 0; i < initial; i++) { - rc = pci_iov_add_virtfn(dev, i); - if (rc) - goto failed; - } + rc = sriov_add_vfs(dev, initial); + if (rc) + goto err_pcibios; kobject_uevent(&dev->dev.kobj, KOBJ_CHANGE); iov->num_VFs = nr_virtfn; return 0; -failed: - while (i--) - pci_iov_remove_virtfn(dev, i); - err_pcibios: iov->ctrl &= ~(PCI_SRIOV_CTRL_VFE | PCI_SRIOV_CTRL_MSE); pci_cfg_access_lock(dev); @@ -368,17 +383,26 @@ err_pcibios: return rc; } -static void sriov_disable(struct pci_dev *dev) +static void sriov_del_vfs(struct pci_dev *dev) { - int i; struct pci_sriov *iov = dev->sriov; + int i; - if (!iov->num_VFs) + if (dev->no_vf_scan) return; for (i = 0; i < iov->num_VFs; i++) pci_iov_remove_virtfn(dev, i); +} + +static void sriov_disable(struct pci_dev *dev) +{ + struct pci_sriov *iov = dev->sriov; + + if (!iov->num_VFs) + return; + sriov_del_vfs(dev); iov->ctrl &= ~(PCI_SRIOV_CTRL_VFE | PCI_SRIOV_CTRL_MSE); pci_cfg_access_lock(dev); pci_write_config_word(dev, iov->pos + PCI_SRIOV_CTRL, iov->ctrl); diff --git a/include/linux/pci.h b/include/linux/pci.h index a6cd567c3fc1..8e3c646bc15c 100644 --- a/include/linux/pci.h +++ b/include/linux/pci.h @@ -405,6 +405,7 @@ struct pci_dev { unsigned int non_compliant_bars:1; /* Broken BARs; ignore them */ unsigned int is_probed:1; /* Device probing in progress */ unsigned int link_active_reporting:1;/* Device capable of reporting link active */ + unsigned int no_vf_scan:1; /* Don't scan for VFs after IOV enablement */ pci_dev_flags_t dev_flags; atomic_t enable_cnt; /* pci_enable_device has been called */ |