diff options
| author | Arindam Nath <arindam.nath@amd.com> | 2020-02-05 18:54:22 +0300 |
|---|---|---|
| committer | Jon Mason <jdmason@kudzu.us> | 2020-03-13 17:04:19 +0300 |
| commit | 5cafa48502c833fa175d2d16a26d1b4e0702aa74 (patch) | |
| tree | 36b43477c287bd7fd19f76bff3b8fa481812114b /drivers/ntb/hw/amd/ntb_hw_amd.c | |
| parent | 5c6404d5fa74124c64661ce44d7e447f3bf3df1e (diff) | |
| download | linux-5cafa48502c833fa175d2d16a26d1b4e0702aa74.tar.xz | |
NTB: return the side info status from amd_poll_link
Bit 1 of SIDE_INFO register is an indication that
the driver on the other side of link is ready. We
set this bit during driver initialization sequence.
So rather than having separate macros to return the
status, we can simply return the status of this bit
from amd_poll_link(). So a return of 1 or 0 from
this function will indicate to the caller whether
the driver on the other side of link is ready or not,
respectively.
Signed-off-by: Arindam Nath <arindam.nath@amd.com>
Signed-off-by: Jon Mason <jdmason@kudzu.us>
Diffstat (limited to 'drivers/ntb/hw/amd/ntb_hw_amd.c')
| -rw-r--r-- | drivers/ntb/hw/amd/ntb_hw_amd.c | 11 |
1 files changed, 5 insertions, 6 deletions
diff --git a/drivers/ntb/hw/amd/ntb_hw_amd.c b/drivers/ntb/hw/amd/ntb_hw_amd.c index f50537e0917b..84723420d70b 100644 --- a/drivers/ntb/hw/amd/ntb_hw_amd.c +++ b/drivers/ntb/hw/amd/ntb_hw_amd.c @@ -246,7 +246,7 @@ static int amd_ntb_get_link_status(struct amd_ntb_dev *ndev) static int amd_link_is_up(struct amd_ntb_dev *ndev) { if (!ndev->peer_sta) - return NTB_LNK_STA_ACTIVE(ndev->cntl_sta); + return ndev->cntl_sta; if (ndev->peer_sta & AMD_LINK_UP_EVENT) { ndev->peer_sta = 0; @@ -896,16 +896,15 @@ static int amd_poll_link(struct amd_ntb_dev *ndev) u32 reg; reg = readl(mmio + AMD_SIDEINFO_OFFSET); - reg &= NTB_LIN_STA_ACTIVE_BIT; + reg &= AMD_SIDE_READY; dev_dbg(&ndev->ntb.pdev->dev, "%s: reg_val = 0x%x.\n", __func__, reg); - if (reg == ndev->cntl_sta) - return 0; - ndev->cntl_sta = reg; - return amd_ntb_get_link_status(ndev); + amd_ntb_get_link_status(ndev); + + return ndev->cntl_sta; } static void amd_link_hb(struct work_struct *work) |