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Commit 7539a613 authored by Jon Mason's avatar Jon Mason Committed by David S. Miller
Browse files

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: default avatarJon Mason <mason@myri.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 3b20b2dc

drivers/net/myri10ge/myri10ge.c

+21 −0
Original line number Diff line number Diff line
@@ -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));