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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>
This commit is contained in:
Jon Mason 2011-06-27 05:05:01 +00:00 committed by David S. Miller
parent 3b20b2dc5f
commit 7539a613c6
1 changed files with 21 additions and 0 deletions
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21
drivers/net/myri10ge/myri10ge.c
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@ -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));