Minki/linux
1
0
Fork 1
mirror of https://github.com/torvalds/linux.git synced 2024-11-22 04:02:20 +00:00
Code Issues Packages Projects Releases Wiki Activity

ntb: ntb_hw_intel: link_poll isn't clearing the pending status properly

Browse Source 
On Skylake hardware, the link_poll isn't clearing the pending interrupt
bit.  Adding a new function for SKX that handles clearing of status bit the
right way.

Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Fixes: 783dfa6c ("ntb: Adding Skylake Xeon NTB support")
Signed-off-by: Jon Mason <jdmason@kudzu.us>
This commit is contained in:
Dave Jiang 2017-02-16 16:22:36 -07:00 committed by Jon Mason
parent 8fcd0950c0
commit 939ada5fb5
1 changed files with 23 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

24
drivers/ntb/hw/intel/ntb_hw_intel.c
View File

@ -1629,6 +1629,28 @@ static void atom_deinit_dev(struct intel_ntb_dev *ndev)
/* Skylake Xeon NTB */
static int skx_poll_link(struct intel_ntb_dev *ndev)
{
u16 reg_val;
int rc;
ndev->reg->db_iowrite(ndev->db_link_mask,
ndev->self_mmio +
ndev->self_reg->db_clear);
rc = pci_read_config_word(ndev->ntb.pdev,
SKX_LINK_STATUS_OFFSET, &reg_val);
if (rc)
return 0;
if (reg_val == ndev->lnk_sta)
return 0;
ndev->lnk_sta = reg_val;
return 1;
}
static u64 skx_db_ioread(void __iomem *mmio)
{
return ioread64(mmio);
@ -2852,7 +2874,7 @@ static struct intel_b2b_addr xeon_b2b_dsd_addr = {
};
static const struct intel_ntb_reg skx_reg = {
.poll_link = xeon_poll_link,
.poll_link = skx_poll_link,
.link_is_up = xeon_link_is_up,
.db_ioread = skx_db_ioread,
.db_iowrite = skx_db_iowrite,