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dahdi: Add dahdi_pci_disable_link_state for kernel < 2.6.25.

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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
This commit is contained in:
Shaun Ruffell
2012-03-21 16:33:51 +00:00
parent b278ce23b5
commit da11ba2f0f
2 changed files with 35 additions and 0 deletions
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18
drivers/dahdi/dahdi-base.c
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@@ -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, &reg16);
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)
{