AcoSail/kernel_optimize_test
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x86/PCI: Don't track firmware-assigned BAR values for hot-added devices

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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>
This commit is contained in:
Yinghai Lu 2012-11-03 21:39:28 -07:00 committed by Bjorn Helgaas
parent dc2f56fa84
commit 745216025d
1 changed files with 9 additions and 1 deletions
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10
arch/x86/pci/i386.c
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@ -51,6 +51,7 @@ struct pcibios_fwaddrmap {
static LIST_HEAD(pcibios_fwaddrmappings); static LIST_HEAD(pcibios_fwaddrmappings);
static DEFINE_SPINLOCK(pcibios_fwaddrmap_lock); static DEFINE_SPINLOCK(pcibios_fwaddrmap_lock);
static bool pcibios_fw_addr_done;
/* Must be called with 'pcibios_fwaddrmap_lock' lock held. */ /* Must be called with 'pcibios_fwaddrmap_lock' lock held. */
static struct pcibios_fwaddrmap *pcibios_fwaddrmap_lookup(struct pci_dev *dev) 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; unsigned long flags;
struct pcibios_fwaddrmap *map; struct pcibios_fwaddrmap *map;
if (pcibios_fw_addr_done)
return;
spin_lock_irqsave(&pcibios_fwaddrmap_lock, flags); spin_lock_irqsave(&pcibios_fwaddrmap_lock, flags);
map = pcibios_fwaddrmap_lookup(dev); map = pcibios_fwaddrmap_lookup(dev);
if (!map) { if (!map) {
@ -97,6 +101,9 @@ resource_size_t pcibios_retrieve_fw_addr(struct pci_dev *dev, int idx)
struct pcibios_fwaddrmap *map; struct pcibios_fwaddrmap *map;
resource_size_t fw_addr = 0; resource_size_t fw_addr = 0;
if (pcibios_fw_addr_done)
return 0;
spin_lock_irqsave(&pcibios_fwaddrmap_lock, flags); spin_lock_irqsave(&pcibios_fwaddrmap_lock, flags);
map = pcibios_fwaddrmap_lookup(dev); map = pcibios_fwaddrmap_lookup(dev);
if (map) if (map)
@ -106,7 +113,7 @@ resource_size_t pcibios_retrieve_fw_addr(struct pci_dev *dev, int idx)
return fw_addr; return fw_addr;
} }
static void pcibios_fw_addr_list_del(void) static void __init pcibios_fw_addr_list_del(void)
{ {
unsigned long flags; unsigned long flags;
struct pcibios_fwaddrmap *entry, *next; struct pcibios_fwaddrmap *entry, *next;
@ -118,6 +125,7 @@ static void pcibios_fw_addr_list_del(void)
kfree(entry); kfree(entry);
} }
spin_unlock_irqrestore(&pcibios_fwaddrmap_lock, flags); spin_unlock_irqrestore(&pcibios_fwaddrmap_lock, flags);
pcibios_fw_addr_done = true;
} }
static int static int