diff options
| author | Yinghai Lu <yinghai@kernel.org> | 2012-11-03 21:39:28 -0700 |
|---|---|---|
| committer | Bjorn Helgaas <bhelgaas@google.com> | 2013-01-07 15:58:43 -0700 |
| commit | 745216025de0354eea23493d994e3fc0ab7369fc (patch) | |
| tree | f078a19befc5fd3699b4ed4e637c91a11d44fe40 /arch/x86/pci/i386.c | |
| parent | dc2f56fa8400677ef4852d5128f03b795cf57e7b (diff) | |
x86/PCI: Don't track firmware-assigned BAR values for hot-added devices
The BIOS doesn't assign BAR values for hot-added devices, so don't
bother saving the original values when we enumerate these devices.
[bhelgaas: changelog, return constant 0 in pcibios_retrieve_fw_addr]
Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Diffstat (limited to 'arch/x86/pci/i386.c')
| -rw-r--r-- | arch/x86/pci/i386.c | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/arch/x86/pci/i386.c b/arch/x86/pci/i386.c index 42dd75552351..1bd672ab0084 100644 --- a/arch/x86/pci/i386.c +++ b/arch/x86/pci/i386.c @@ -51,6 +51,7 @@ struct pcibios_fwaddrmap { static LIST_HEAD(pcibios_fwaddrmappings); static DEFINE_SPINLOCK(pcibios_fwaddrmap_lock); +static bool pcibios_fw_addr_done; /* Must be called with 'pcibios_fwaddrmap_lock' lock held. */ static struct pcibios_fwaddrmap *pcibios_fwaddrmap_lookup(struct pci_dev *dev) @@ -72,6 +73,9 @@ pcibios_save_fw_addr(struct pci_dev *dev, int idx, resource_size_t fw_addr) unsigned long flags; struct pcibios_fwaddrmap *map; + if (pcibios_fw_addr_done) + return; + spin_lock_irqsave(&pcibios_fwaddrmap_lock, flags); map = pcibios_fwaddrmap_lookup(dev); if (!map) { @@ -97,6 +101,9 @@ resource_size_t pcibios_retrieve_fw_addr(struct pci_dev *dev, int idx) struct pcibios_fwaddrmap *map; resource_size_t fw_addr = 0; + if (pcibios_fw_addr_done) + return 0; + spin_lock_irqsave(&pcibios_fwaddrmap_lock, flags); map = pcibios_fwaddrmap_lookup(dev); if (map) @@ -106,7 +113,7 @@ resource_size_t pcibios_retrieve_fw_addr(struct pci_dev *dev, int idx) return fw_addr; } -static void pcibios_fw_addr_list_del(void) +static void __init pcibios_fw_addr_list_del(void) { unsigned long flags; struct pcibios_fwaddrmap *entry, *next; @@ -118,6 +125,7 @@ static void pcibios_fw_addr_list_del(void) kfree(entry); } spin_unlock_irqrestore(&pcibios_fwaddrmap_lock, flags); + pcibios_fw_addr_done = true; } static int |