diff options
| author | Jon Mason <mason@myri.com> | 2011-06-27 05:05:01 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2011-06-29 06:02:04 -0700 |
| commit | 7539a613c646f9e870bbedfa753a54cf13b98d22 (patch) | |
| tree | e0d0433cde6ea1fa58550b8011eeab97b7719c43 | |
| parent | 3b20b2dc5f713aa7eca20a8ff942292974a1cc94 (diff) | |
myri10ge: Mask PCI Surprise Link Down Events
A SRAM parity error can cause a surprise link down. Since We can
recover from SRAM parity errors, mask PCI surprise down events.
Signed-off-by: Jon Mason <mason@myri.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | drivers/net/myri10ge/myri10ge.c | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/drivers/net/myri10ge/myri10ge.c b/drivers/net/myri10ge/myri10ge.c index a8ae641d0bd1..0f0f83d50ddc 100644 --- a/drivers/net/myri10ge/myri10ge.c +++ b/drivers/net/myri10ge/myri10ge.c @@ -3327,6 +3327,26 @@ static void myri10ge_select_firmware(struct myri10ge_priv *mgp) mgp->fw_name); } +static void myri10ge_mask_surprise_down(struct pci_dev *pdev) +{ + struct pci_dev *bridge = pdev->bus->self; + int cap; + u32 mask; + + if (bridge == NULL) + return; + + cap = pci_find_ext_capability(bridge, PCI_EXT_CAP_ID_ERR); + if (cap) { + /* a sram parity error can cause a surprise link + * down; since we expect and can recover from sram + * parity errors, mask surprise link down events */ + pci_read_config_dword(bridge, cap + PCI_ERR_UNCOR_MASK, &mask); + mask |= 0x20; + pci_write_config_dword(bridge, cap + PCI_ERR_UNCOR_MASK, mask); + } +} + #ifdef CONFIG_PM static int myri10ge_suspend(struct pci_dev *pdev, pm_message_t state) { @@ -3845,6 +3865,7 @@ static int myri10ge_probe(struct pci_dev *pdev, const struct pci_device_id *ent) goto abort_with_enabled; } + myri10ge_mask_surprise_down(pdev); pci_set_master(pdev); dac_enabled = 1; status = pci_set_dma_mask(pdev, DMA_BIT_MASK(64)); |