diff options
| author | James Smart <jsmart2021@gmail.com> | 2021-09-10 16:31:56 -0700 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2021-09-14 23:33:21 -0400 |
| commit | 3ea998cbf9e781b6d16250fab1e6121dce32790b (patch) | |
| tree | 0859a0d3850eaec572256b85ea63467be523c9a7 /drivers/scsi/lpfc/lpfc_scsi.c | |
| parent | d5ac69b332d8859d1f8bd5d4dee31f3267f6b0d2 (diff) | |
| download | linux-3ea998cbf9e781b6d16250fab1e6121dce32790b.tar.bz2 | |
scsi: lpfc: Fix I/O block after enabling managed congestion mode
If the congestion management framework dynamically enables, it may do so
while I/O is in flight. The updates of cmf info due to inflight I/O
completing may happen before values have been initialized.
Fix by ensure cmf_max_bytes_per_interval is initialized when checking
bandwidth utilization for SCSI layer blocking.
Link: https://lore.kernel.org/r/20210910233159.115896-12-jsmart2021@gmail.com
Co-developed-by: Justin Tee <justin.tee@broadcom.com>
Signed-off-by: Justin Tee <justin.tee@broadcom.com>
Signed-off-by: James Smart <jsmart2021@gmail.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/scsi/lpfc/lpfc_scsi.c')
| -rw-r--r-- | drivers/scsi/lpfc/lpfc_scsi.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/scsi/lpfc/lpfc_scsi.c b/drivers/scsi/lpfc/lpfc_scsi.c index b70f71b5c1f7..a2cd22728b0f 100644 --- a/drivers/scsi/lpfc/lpfc_scsi.c +++ b/drivers/scsi/lpfc/lpfc_scsi.c @@ -3961,7 +3961,8 @@ lpfc_update_cmf_cmd(struct lpfc_hba *phba, uint32_t size) int cpu; /* At this point we are either LPFC_CFG_MANAGED or LPFC_CFG_MONITOR */ - if (phba->cmf_active_mode == LPFC_CFG_MANAGED) { + if (phba->cmf_active_mode == LPFC_CFG_MANAGED && + phba->cmf_max_bytes_per_interval) { total = 0; for_each_present_cpu(cpu) { cgs = per_cpu_ptr(phba->cmf_stat, cpu); |