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NTB: Enable link up and down event notification 

Link-Up and Link-Down events can occur irrespective
of whether a data transfer is in progress or not.
So we need to enable the interrupt delivery for
these events early during driver load.

Signed-off-by: Arindam Nath <arindam.nath@amd.com>
Signed-off-by: Jon Mason <jdmason@kudzu.us>
This commit is contained in:
Arindam Nath 2020-02-05 21:24:20 +05:30 committed by Jon Mason
parent 52ba447889
commit 8a7cedef44
1 changed files with 5 additions and 0 deletions
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5
drivers/ntb/hw/amd/ntb_hw_amd.c
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@ -994,6 +994,7 @@ static enum ntb_topo amd_get_topo(struct amd_ntb_dev *ndev)
static int amd_init_dev(struct amd_ntb_dev *ndev) static int amd_init_dev(struct amd_ntb_dev *ndev)
{ {
void __iomem *mmio = ndev->self_mmio;
struct pci_dev *pdev; struct pci_dev *pdev;
int rc = 0; int rc = 0;
@ -1015,6 +1016,10 @@ static int amd_init_dev(struct amd_ntb_dev *ndev)
ndev->db_valid_mask = BIT_ULL(ndev->db_count) - 1; ndev->db_valid_mask = BIT_ULL(ndev->db_count) - 1;
/* Enable Link-Up and Link-Down event interrupts */
ndev->int_mask &= ~(AMD_LINK_UP_EVENT | AMD_LINK_DOWN_EVENT);
writel(ndev->int_mask, mmio + AMD_INTMASK_OFFSET);
return 0; return 0;
} }