Messages in this thread Patch in this message | | | From | Myron Stowe <> | Subject | [PATCH -v2 16/16] PCI: latency timer doesn't apply to PCIe | Date | Fri, 28 Oct 2011 15:49:20 -0600 |
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From: Myron Stowe <mstowe@redhat.com>
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> ---
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 a50e643..a20c01a 100644 --- a/drivers/pci/pci.c +++ b/drivers/pci/pci.c @@ -2607,6 +2607,10 @@ 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;
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