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| author |   Ingo Molnar <mingo@elte.hu> | 2010-08-19 12:48:09 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2010-08-19 12:48:09 +0200 |
| commit | c8710ad38900153af7a3e6762e99c062cfa46443 (patch) | |
| tree | a0c0632274c4eb72f51e99a5861f71cffe65ea60 /drivers/pci/pcie/aspm.c | |
| parent | perf, tracing: add missing __percpu markups (diff) | |
| parent | tracing: Clean up seqfile code for format file (diff) | |
| download | linux-dev-c8710ad38900153af7a3e6762e99c062cfa46443.tar.xz linux-dev-c8710ad38900153af7a3e6762e99c062cfa46443.zip | |
Merge branch 'tip/perf/urgent' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-2.6-trace into perf/core
Diffstat (limited to 'drivers/pci/pcie/aspm.c')
| -rw-r--r-- | drivers/pci/pcie/aspm.c | 16 |
1 files changed, 14 insertions, 2 deletions
diff --git a/drivers/pci/pcie/aspm.c b/drivers/pci/pcie/aspm.c index be53d98fa384..71222814c1ec 100644 --- a/drivers/pci/pcie/aspm.c +++ b/drivers/pci/pcie/aspm.c @@ -588,11 +588,23 @@ void pcie_aspm_init_link_state(struct pci_dev *pdev) * update through pcie_aspm_cap_init(). */ pcie_aspm_cap_init(link, blacklist); - pcie_config_aspm_path(link); /* Setup initial Clock PM state */ pcie_clkpm_cap_init(link, blacklist); - pcie_set_clkpm(link, policy_to_clkpm_state(link)); + + /* + * At this stage drivers haven't had an opportunity to change the + * link policy setting. Enabling ASPM on broken hardware can cripple + * it even before the driver has had a chance to disable ASPM, so + * default to a safe level right now. If we're enabling ASPM beyond + * the BIOS's expectation, we'll do so once pci_enable_device() is + * called. + */ + if (aspm_policy != POLICY_POWERSAVE) { + pcie_config_aspm_path(link); + pcie_set_clkpm(link, policy_to_clkpm_state(link)); + } + unlock: mutex_unlock(&aspm_lock); out: |