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| author | Myron Stowe <mstowe@redhat.com> | 2011-10-28 15:49:20 -0600 |
|---|---|---|
| committer | Jesse Barnes <jbarnes@virtuousgeek.org> | 2012-01-06 12:10:47 -0800 |
| commit | f676678f8952d5e2bfc03903dba410c856ae3f3d (patch) | |
| tree | cdc760f3c0f26635f39b2cb2bc404d375ca1eb05 | |
| parent | b9a276ad262815d88f4dd232d578864949aab3b9 (diff) | |
| download | op-kernel-dev-f676678f8952d5e2bfc03903dba410c856ae3f3d.zip op-kernel-dev-f676678f8952d5e2bfc03903dba410c856ae3f3d.tar.gz | |
PCI: latency timer doesn't apply to PCIe
The latency timer is read-only and hardwired to zero for all PCIe
devices, both Type 0 and Type 1, so don't bother trying to update it
and cluttering the dmesg log with meaningless "setting latency timer
to 64" messages.
Signed-off-by: Myron Stowe <myron.stowe@redhat.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
| -rw-r--r-- | drivers/pci/pci.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c index f9abe84..5c5adef 100644 --- a/drivers/pci/pci.c +++ b/drivers/pci/pci.c @@ -2613,6 +2613,10 @@ void __weak pcibios_set_master(struct pci_dev *dev) { u8 lat; + /* The latency timer doesn't apply to PCIe (either Type 0 or Type 1) */ + if (pci_is_pcie(dev)) + return; + pci_read_config_byte(dev, PCI_LATENCY_TIMER, &lat); if (lat < 16) lat = (64 <= pcibios_max_latency) ? 64 : pcibios_max_latency; |
