diff options
| author | Sebastian Ott <sebott@linux.vnet.ibm.com> | 2016-01-27 13:33:30 +0100 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2016-11-23 16:02:26 +0100 |
| commit | 5c5afd0201221be578ec200dfedfa04acda529c1 (patch) | |
| tree | 0a3ef4f5f8320375f48567b453afd4dbf71c246f /arch/s390/pci/pci.c | |
| parent | 80abb39b504e08613549684fa236c1a7ee22a7cd (diff) | |
s390/pci: use unique UIDs for domain enumeration
Use UIDs as domain numbers if the UID checking rules apply (in this
case the FW guarantees uniqueness of these values).
Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390/pci/pci.c')
| -rw-r--r-- | arch/s390/pci/pci.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/arch/s390/pci/pci.c b/arch/s390/pci/pci.c index 15ffc19c8c0c..64e1734bebb7 100644 --- a/arch/s390/pci/pci.c +++ b/arch/s390/pci/pci.c @@ -722,6 +722,11 @@ struct dev_pm_ops pcibios_pm_ops = { static int zpci_alloc_domain(struct zpci_dev *zdev) { + if (zpci_unique_uid) { + zdev->domain = (u16) zdev->uid; + return 0; + } + spin_lock(&zpci_domain_lock); zdev->domain = find_first_zero_bit(zpci_domain, ZPCI_NR_DEVICES); if (zdev->domain == ZPCI_NR_DEVICES) { @@ -735,6 +740,9 @@ static int zpci_alloc_domain(struct zpci_dev *zdev) static void zpci_free_domain(struct zpci_dev *zdev) { + if (zpci_unique_uid) + return; + spin_lock(&zpci_domain_lock); clear_bit(zdev->domain, zpci_domain); spin_unlock(&zpci_domain_lock); |