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| author | Yinghai Lu | 2012-01-27 19:55:12 +0100 |
|---|---|---|
| committer | Jesse Barnes | 2012-02-14 17:45:00 +0100 |
| commit | 4e2ce405b24eef9f4cc947bf5f430ca27b474f1f (patch) | |
| tree | 94f98ed4f240c44209efe9d2321da27a15feb7bd /drivers/pci/hotplug/pciehp_hpc.c | |
| parent | PCI: pciehp: replace unconditional sleep with config space access check (diff) | |
| download | kernel-qcow2-linux-4e2ce405b24eef9f4cc947bf5f430ca27b474f1f.tar.gz kernel-qcow2-linux-4e2ce405b24eef9f4cc947bf5f430ca27b474f1f.tar.xz kernel-qcow2-linux-4e2ce405b24eef9f4cc947bf5f430ca27b474f1f.zip | |
PCI: pciehp: make check_link_active more helpful
A few changes:
- remove the 'inline' and let the complier decide
- return a bool to indicate whether the link was active
- add a debug message to indicate link state when it beocmes active
Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Diffstat (limited to 'drivers/pci/hotplug/pciehp_hpc.c')
| -rw-r--r-- | drivers/pci/hotplug/pciehp_hpc.c | 17 |
1 files changed, 12 insertions, 5 deletions
diff --git a/drivers/pci/hotplug/pciehp_hpc.c b/drivers/pci/hotplug/pciehp_hpc.c index 7dc9e33746a6..a8c1f74a1e36 100644 --- a/drivers/pci/hotplug/pciehp_hpc.c +++ b/drivers/pci/hotplug/pciehp_hpc.c @@ -241,13 +241,20 @@ static int pcie_write_cmd(struct controller *ctrl, u16 cmd, u16 mask) return retval; } -static inline int check_link_active(struct controller *ctrl) +static bool check_link_active(struct controller *ctrl) { - u16 link_status; + bool ret = false; + u16 lnk_status; - if (pciehp_readw(ctrl, PCI_EXP_LNKSTA, &link_status)) - return 0; - return !!(link_status & PCI_EXP_LNKSTA_DLLLA); + if (pciehp_readw(ctrl, PCI_EXP_LNKSTA, &lnk_status)) + return ret; + + ret = !!(lnk_status & PCI_EXP_LNKSTA_DLLLA); + + if (ret) + ctrl_dbg(ctrl, "%s: lnk_status = %x\n", __func__, lnk_status); + + return ret; } static void pcie_wait_link_active(struct controller *ctrl) |