diff options
author | Shaun Ruffell <sruffell@digium.com> | 2012-03-21 16:33:51 +0000 |
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committer | Shaun Ruffell <sruffell@digium.com> | 2012-03-21 16:33:51 +0000 |
commit | 4998f0fc56008a0f7d0426c3d5b10c3995441fff (patch) | |
tree | d8ee849d1ac479a79aad492081595a475292c5df /drivers/dahdi/dahdi-base.c | |
parent | e715aaf4b81fc3b3511fdd07877bb9b395d99ebc (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>
git-svn-id: http://svn.asterisk.org/svn/dahdi/linux/trunk@10556 a0bf4364-ded3-4de4-8d8a-66a801d63aff
Diffstat (limited to 'drivers/dahdi/dahdi-base.c')
-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 88e44be..6cb5ec8 100644 --- a/drivers/dahdi/dahdi-base.c +++ b/drivers/dahdi/dahdi-base.c @@ -10041,6 +10041,24 @@ 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) { |