diff options
Diffstat (limited to 'drivers/pci/iov.c')
| -rw-r--r-- | drivers/pci/iov.c | 23 |
1 files changed, 14 insertions, 9 deletions
diff --git a/drivers/pci/iov.c b/drivers/pci/iov.c index de8ffacf9c9b..21a7182dccd4 100644 --- a/drivers/pci/iov.c +++ b/drivers/pci/iov.c @@ -286,7 +286,6 @@ static int sriov_enable(struct pci_dev *dev, int nr_virtfn) (!(iov->cap & PCI_SRIOV_CAP_VFM) && (nr_virtfn > initial))) return -EINVAL; - pci_write_config_word(dev, iov->pos + PCI_SRIOV_NUM_VF, nr_virtfn); pci_read_config_word(dev, iov->pos + PCI_SRIOV_VF_OFFSET, &offset); pci_read_config_word(dev, iov->pos + PCI_SRIOV_VF_STRIDE, &stride); if (!offset || (nr_virtfn > 1 && !stride)) @@ -324,7 +323,7 @@ static int sriov_enable(struct pci_dev *dev, int nr_virtfn) if (!pdev->is_physfn) { pci_dev_put(pdev); - return -ENODEV; + return -ENOSYS; } rc = sysfs_create_link(&dev->dev.kobj, @@ -334,6 +333,7 @@ static int sriov_enable(struct pci_dev *dev, int nr_virtfn) return rc; } + pci_write_config_word(dev, iov->pos + PCI_SRIOV_NUM_VF, nr_virtfn); 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); @@ -368,6 +368,7 @@ failed: 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); + pci_write_config_word(dev, iov->pos + PCI_SRIOV_NUM_VF, 0); ssleep(1); pci_cfg_access_unlock(dev); @@ -401,6 +402,7 @@ static void sriov_disable(struct pci_dev *dev) sysfs_remove_link(&dev->dev.kobj, "dep_link"); iov->num_VFs = 0; + pci_write_config_word(dev, iov->pos + PCI_SRIOV_NUM_VF, 0); } static int sriov_init(struct pci_dev *dev, int pos) @@ -662,7 +664,7 @@ int pci_enable_sriov(struct pci_dev *dev, int nr_virtfn) might_sleep(); if (!dev->is_physfn) - return -ENODEV; + return -ENOSYS; return sriov_enable(dev, nr_virtfn); } @@ -722,7 +724,7 @@ EXPORT_SYMBOL_GPL(pci_num_vf); * @dev: the PCI device * * Returns number of VFs belonging to this device that are assigned to a guest. - * If device is not a physical function returns -ENODEV. + * If device is not a physical function returns 0. */ int pci_vfs_assigned(struct pci_dev *dev) { @@ -767,12 +769,15 @@ EXPORT_SYMBOL_GPL(pci_vfs_assigned); * device's mutex held. * * Returns 0 if PF is an SRIOV-capable device and - * value of numvfs valid. If not a PF with VFS, return -EINVAL; + * value of numvfs valid. If not a PF return -ENOSYS; + * if numvfs is invalid return -EINVAL; * if VFs already enabled, return -EBUSY. */ int pci_sriov_set_totalvfs(struct pci_dev *dev, u16 numvfs) { - if (!dev->is_physfn || (numvfs > dev->sriov->total_VFs)) + if (!dev->is_physfn) + return -ENOSYS; + if (numvfs > dev->sriov->total_VFs) return -EINVAL; /* Shouldn't change if VFs already enabled */ @@ -786,17 +791,17 @@ int pci_sriov_set_totalvfs(struct pci_dev *dev, u16 numvfs) EXPORT_SYMBOL_GPL(pci_sriov_set_totalvfs); /** - * pci_sriov_get_totalvfs -- get total VFs supported on this devic3 + * pci_sriov_get_totalvfs -- get total VFs supported on this device * @dev: the PCI PF device * * For a PCIe device with SRIOV support, return the PCIe * SRIOV capability value of TotalVFs or the value of driver_max_VFs - * if the driver reduced it. Otherwise, -EINVAL. + * if the driver reduced it. Otherwise 0. */ int pci_sriov_get_totalvfs(struct pci_dev *dev) { if (!dev->is_physfn) - return -EINVAL; + return 0; if (dev->sriov->driver_max_VFs) return dev->sriov->driver_max_VFs; |