Fix number of IO channels to match CPUs
Signed-off-by: James Smart <james.smart@xxxxxxxxxx>
---
lpfc_init.c | 14 ++++++++++++++
1 file changed, 14 insertions(+)
diff -upNr a/drivers/scsi/lpfc/lpfc_init.c b/drivers/scsi/lpfc/lpfc_init.c
--- a/drivers/scsi/lpfc/lpfc_init.c 2012-08-11 12:24:51.636924276 -0400
+++ b/drivers/scsi/lpfc/lpfc_init.c 2012-08-11 12:24:51.775924271 -0400
@@ -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 *
/* 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;
--
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