diff options
| author | Shaun Ruffell <sruffell@digium.com> | 2012-03-21 19:11:44 +0000 |
|---|---|---|
| committer | Shaun Ruffell <sruffell@digium.com> | 2012-03-21 19:11:44 +0000 |
| commit | afeb6f6ded7dcb5f52f7ddb976542c67bbc0c762 (patch) | |
| tree | afa0c114e6e37249cc6f424d3b8729c5f13f15c8 /drivers | |
| parent | 98f1fa92461b25cc2aa0255b950a18c0ce0709cf (diff) | |
dahdi: Add dahdi_pci_disable_link_state for kernel < 2.6.25.
Will allow the ASPM (Active State Power Management) state to be disabled on
PCIe devices before kernel version 2.6.25.
Signed-off-by: Shaun Ruffell <sruffell@digium.com>
Origin: http://svnview.digium.com/svn/dahdi?view=rev&rev=10556
git-svn-id: http://svn.asterisk.org/svn/dahdi/linux/branches/2.6@10564 a0bf4364-ded3-4de4-8d8a-66a801d63aff
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/dahdi/dahdi-base.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/drivers/dahdi/dahdi-base.c b/drivers/dahdi/dahdi-base.c index c690b94..3137bde 100644 --- a/drivers/dahdi/dahdi-base.c +++ b/drivers/dahdi/dahdi-base.c @@ -10045,6 +10045,24 @@ failed_driver_init: return res; } +#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 25) +#ifdef CONFIG_PCI +void dahdi_pci_disable_link_state(struct pci_dev *pdev, int state) +{ + u16 reg16; + int pos = pci_find_capability(pdev, PCI_CAP_ID_EXP); + state &= (PCIE_LINK_STATE_L0S | PCIE_LINK_STATE_L1 | + PCIE_LINK_STATE_CLKPM); + if (!pos) + return; + pci_read_config_word(pdev, pos + PCI_EXP_LNKCTL, ®16); + reg16 &= ~(state); + pci_write_config_word(pdev, pos + PCI_EXP_LNKCTL, reg16); +} +EXPORT_SYMBOL(dahdi_pci_disable_link_state); +#endif /* CONFIG_PCI */ +#endif /* 2.6.25 */ + #if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 22) static inline void flush_find_master_work(void) { |