diff options
Diffstat (limited to 'drivers/pci/ats.c')
| -rw-r--r-- | drivers/pci/ats.c | 9 |
1 files changed, 4 insertions, 5 deletions
diff --git a/drivers/pci/ats.c b/drivers/pci/ats.c index 9355f754c7c2..ceda7dc556d4 100644 --- a/drivers/pci/ats.c +++ b/drivers/pci/ats.c @@ -20,16 +20,12 @@ void pci_ats_init(struct pci_dev *dev) { int pos; - u16 cap; pos = pci_find_ext_capability(dev, PCI_EXT_CAP_ID_ATS); if (!pos) return; dev->ats_cap = pos; - pci_read_config_word(dev, dev->ats_cap + PCI_ATS_CAP, &cap); - dev->ats_qdep = PCI_ATS_CAP_QDEP(cap) ? PCI_ATS_CAP_QDEP(cap) : - PCI_ATS_MAX_QDEP; } /** @@ -131,13 +127,16 @@ EXPORT_SYMBOL_GPL(pci_restore_ats_state); */ int pci_ats_queue_depth(struct pci_dev *dev) { + u16 cap; + if (!dev->ats_cap) return -EINVAL; if (dev->is_virtfn) return 0; - return dev->ats_qdep; + pci_read_config_word(dev, dev->ats_cap + PCI_ATS_CAP, &cap); + return PCI_ATS_CAP_QDEP(cap) ? PCI_ATS_CAP_QDEP(cap) : PCI_ATS_MAX_QDEP; } EXPORT_SYMBOL_GPL(pci_ats_queue_depth); |