diff options
Diffstat (limited to 'drivers/pci/pcie')
| -rw-r--r-- | drivers/pci/pcie/aspm.c | 13 |
1 files changed, 9 insertions, 4 deletions
diff --git a/drivers/pci/pcie/aspm.c b/drivers/pci/pcie/aspm.c index 4d8e2c7b2ad..586b6f75910 100644 --- a/drivers/pci/pcie/aspm.c +++ b/drivers/pci/pcie/aspm.c @@ -17,6 +17,7 @@ #include <linux/init.h> #include <linux/slab.h> #include <linux/jiffies.h> +#include <linux/delay.h> #include <linux/pci-aspm.h> #include "../pci.h" @@ -75,6 +76,8 @@ static const char *policy_str[] = { [POLICY_POWERSAVE] = "powersave" }; +#define LINK_RETRAIN_TIMEOUT HZ + static int policy_to_aspm_state(struct pci_dev *pdev) { struct pcie_link_state *link_state = pdev->link_state; @@ -238,16 +241,18 @@ static void pcie_aspm_configure_common_clock(struct pci_dev *pdev) pci_write_config_word(pdev, pos + PCI_EXP_LNKCTL, reg16); /* Wait for link training end */ - /* break out after waiting for 1 second */ + /* break out after waiting for timeout */ start_jiffies = jiffies; - while ((jiffies - start_jiffies) < HZ) { + for (;;) { pci_read_config_word(pdev, pos + PCI_EXP_LNKSTA, ®16); if (!(reg16 & PCI_EXP_LNKSTA_LT)) break; - cpu_relax(); + if (time_after(jiffies, start_jiffies + LINK_RETRAIN_TIMEOUT)) + break; + msleep(1); } /* training failed -> recover */ - if ((jiffies - start_jiffies) >= HZ) { + if (reg16 & PCI_EXP_LNKSTA_LT) { dev_printk (KERN_ERR, &pdev->dev, "ASPM: Could not configure" " common clock\n"); i = 0; |