diff options
| author | Luo Jiaxing <luojiaxing@huawei.com> | 2019-10-24 22:08:25 +0800 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2019-10-24 21:31:15 -0400 |
| commit | f873b66119f2d6fc7b932a68df8d77a26357bab6 (patch) | |
| tree | 7cb350f345f8e38d41f7eacfb4a0679f6f07f55b /drivers/scsi/hisi_sas/hisi_sas_v3_hw.c | |
| parent | cabe7c10c97a0857a9fb14b6c772ab784947995d (diff) | |
scsi: hisi_sas: Record the phy down event in debugfs
The number of phy down reflects the quality of the link between SAS
controller and disk. In order to allow the user to confirm the link quality
of the system, we record the number of phy down for each phy.
The user can check the current phy down count by reading the debugfs file
corresponding to the specific phy, or clear the phy down count by writing 0
to the debugfs file.
Link: https://lore.kernel.org/r/1571926105-74636-19-git-send-email-john.garry@huawei.com
Signed-off-by: Luo Jiaxing <luojiaxing@huawei.com>
Signed-off-by: John Garry <john.garry@huawei.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/scsi/hisi_sas/hisi_sas_v3_hw.c')
| -rw-r--r-- | drivers/scsi/hisi_sas/hisi_sas_v3_hw.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/scsi/hisi_sas/hisi_sas_v3_hw.c b/drivers/scsi/hisi_sas/hisi_sas_v3_hw.c index e4da309009c0..2ae7070db41a 100644 --- a/drivers/scsi/hisi_sas/hisi_sas_v3_hw.c +++ b/drivers/scsi/hisi_sas/hisi_sas_v3_hw.c @@ -1549,6 +1549,8 @@ static irqreturn_t phy_down_v3_hw(int phy_no, struct hisi_hba *hisi_hba) u32 phy_state, sl_ctrl, txid_auto; struct device *dev = hisi_hba->dev; + atomic_inc(&phy->down_cnt); + del_timer(&phy->timer); hisi_sas_phy_write32(hisi_hba, phy_no, PHYCTRL_NOT_RDY_MSK, 1); |