diff options
| author | Luo Jiaxing <luojiaxing@huawei.com> | 2019-10-24 17:08:25 +0300 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2019-10-25 04:31:15 +0300 |
| commit | f873b66119f2d6fc7b932a68df8d77a26357bab6 (patch) | |
| tree | 7cb350f345f8e38d41f7eacfb4a0679f6f07f55b /drivers/scsi/hisi_sas/hisi_sas.h | |
| parent | cabe7c10c97a0857a9fb14b6c772ab784947995d (diff) | |
| download | linux-f873b66119f2d6fc7b932a68df8d77a26357bab6.tar.xz | |
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.h')
| -rw-r--r-- | drivers/scsi/hisi_sas/hisi_sas.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/scsi/hisi_sas/hisi_sas.h b/drivers/scsi/hisi_sas/hisi_sas.h index 72823222e08f..233c73e01246 100644 --- a/drivers/scsi/hisi_sas/hisi_sas.h +++ b/drivers/scsi/hisi_sas/hisi_sas.h @@ -169,6 +169,7 @@ struct hisi_sas_phy { enum sas_linkrate minimum_linkrate; enum sas_linkrate maximum_linkrate; int enable; + atomic_t down_cnt; }; struct hisi_sas_port { |