diff mbox series

[11/14] lpfc: Fix I/O block after enabling managed congestion mode

Message ID 20210910233159.115896-12-jsmart2021@gmail.com (mailing list archive)
State Accepted
Headers show
Series lpfc: Update lpfc to revision 14.0.0.2 | expand

Commit Message

James Smart Sept. 10, 2021, 11:31 p.m. UTC 
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.

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>
---
 drivers/scsi/lpfc/lpfc_scsi.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)
diff mbox series

Patch

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);