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-rw-r--r--drivers/pci/host/pcie-altera.c12
1 files changed, 11 insertions, 1 deletions
diff --git a/drivers/pci/host/pcie-altera.c b/drivers/pci/host/pcie-altera.c
index b61025ee07de..e4154b2a23ce 100644
--- a/drivers/pci/host/pcie-altera.c
+++ b/drivers/pci/host/pcie-altera.c
@@ -61,6 +61,8 @@
#define TLP_LOOP 500
#define RP_DEVFN 0
+#define LINK_UP_TIMEOUT 5000
+
#define INTX_NUM 4
#define DWORD_MASK 3
@@ -101,6 +103,7 @@ static void altera_pcie_retrain(struct pci_dev *dev)
{
u16 linkcap, linkstat;
struct altera_pcie *pcie = dev->bus->sysdata;
+ int timeout = 0;
if (!altera_pcie_link_is_up(pcie))
return;
@@ -115,9 +118,16 @@ static void altera_pcie_retrain(struct pci_dev *dev)
return;
pcie_capability_read_word(dev, PCI_EXP_LNKSTA, &linkstat);
- if ((linkstat & PCI_EXP_LNKSTA_CLS) == PCI_EXP_LNKSTA_CLS_2_5GB)
+ if ((linkstat & PCI_EXP_LNKSTA_CLS) == PCI_EXP_LNKSTA_CLS_2_5GB) {
pcie_capability_set_word(dev, PCI_EXP_LNKCTL,
PCI_EXP_LNKCTL_RL);
+ while (!altera_pcie_link_is_up(pcie)) {
+ timeout++;
+ if (timeout > LINK_UP_TIMEOUT)
+ break;
+ udelay(5);
+ }
+ }
}
DECLARE_PCI_FIXUP_EARLY(0x1172, PCI_ANY_ID, altera_pcie_retrain);