[SCSI] lpfc 8.3.34: Fix number of IO channels to match CPUs

Signed-off-by: James Smart <james.smart@emulex.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>

1 files changed, 14 insertions, 0 deletions

diff --git a/drivers/scsi/lpfc/lpfc_init.c b/drivers/scsi/lpfc/lpfc_init.c
index d81fec832b98..9ad7943414dd 100644
--- a/drivers/scsi/lpfc/lpfc_init.c
+++ b/drivers/scsi/lpfc/lpfc_init.c
@@ -6542,6 +6542,9 @@ static int
 lpfc_sli4_queue_verify(struct lpfc_hba *phba)
 {
         int cfg_fcp_io_channel;
+        uint32_t cpu;
+        uint32_t i = 0;
+
 
         /*
          * Sanity check for configured queue parameters against the run-time
@@ -6551,6 +6554,17 @@ lpfc_sli4_queue_verify(struct lpfc_hba *phba)
         /* Sanity check on HBA EQ parameters */
         cfg_fcp_io_channel = phba->cfg_fcp_io_channel;
 
+        /* It doesn't make sense to have more io channels then CPUs */
+        for_each_online_cpu(cpu) {
+                i++;
+        }
+        if (i < cfg_fcp_io_channel) {
+                lpfc_printf_log(phba, KERN_WARNING, LOG_INIT,
+                                "3188 Reducing IO channels to match number of "
+                                "CPUs: from %d to %d\n", cfg_fcp_io_channel, i);
+                cfg_fcp_io_channel = i;
+        }
+
         if (cfg_fcp_io_channel >
             phba->sli4_hba.max_cfg_param.max_eq) {
                 cfg_fcp_io_channel = phba->sli4_hba.max_cfg_param.max_eq;