diff options
| author |   Heiner Kallweit <hkallweit1@gmail.com> | 2017-12-12 07:40:56 +0100 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2017-12-13 14:51:50 -0500 |
| commit | fc0f9f4d2f26b12fd2eda239bb8f18ceaf192c91 (patch) | |
| tree | 42ffc390d9e5fe9077b505f5762c1b767e3a9ac7 /drivers | |
| parent | tcp/dccp: avoid one atomic operation for timewait hashdance (diff) | |
| download | linux-dev-fc0f9f4d2f26b12fd2eda239bb8f18ceaf192c91.tar.xz linux-dev-fc0f9f4d2f26b12fd2eda239bb8f18ceaf192c91.zip | |
PCI: Add pcim_set_mwi(), a device-managed pci_set_mwi()
Add pcim_set_mwi(), a device-managed version of pci_set_mwi().
First user is the Realtek r8169 driver.
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/pci/pci.c | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c index 4a7c6864fdf4..764ca7b8840d 100644 --- a/drivers/pci/pci.c +++ b/drivers/pci/pci.c @@ -1458,6 +1458,7 @@ struct pci_devres { unsigned int pinned:1; unsigned int orig_intx:1; unsigned int restore_intx:1; + unsigned int mwi:1; u32 region_mask; }; @@ -1476,6 +1477,9 @@ static void pcim_release(struct device *gendev, void *res) if (this->region_mask & (1 << i)) pci_release_region(dev, i); + if (this->mwi) + pci_clear_mwi(dev); + if (this->restore_intx) pci_intx(dev, this->orig_intx); @@ -3761,6 +3765,27 @@ int pci_set_mwi(struct pci_dev *dev) EXPORT_SYMBOL(pci_set_mwi); /** + * pcim_set_mwi - a device-managed pci_set_mwi() + * @dev: the PCI device for which MWI is enabled + * + * Managed pci_set_mwi(). + * + * RETURNS: An appropriate -ERRNO error value on error, or zero for success. + */ +int pcim_set_mwi(struct pci_dev *dev) +{ + struct pci_devres *dr; + + dr = find_pci_dr(dev); + if (!dr) + return -ENOMEM; + + dr->mwi = 1; + return pci_set_mwi(dev); +} +EXPORT_SYMBOL(pcim_set_mwi); + +/** * pci_try_set_mwi - enables memory-write-invalidate PCI transaction * @dev: the PCI device for which MWI is enabled * |