scsi: fnic: Adding Check Condition counter to misc fnicstats

Just a simple counter of number of check conditions encountered on that
host.
Signed-off-by: Satish Kharat <satishkh@cisco.com>
Signed-off-by: Sesidhar Baddela <sebaddel@cisco.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/fnic/fnic_scsi.c

@@ -915,6 +915,9 @@ static void fnic_fcpio_icmnd_cmpl_handler(struct fnic *fnic,
 		if (icmnd_cmpl->flags & FCPIO_ICMND_CMPL_RESID_UNDER)
 			xfer_len -= icmnd_cmpl->residual;
 
+		if (icmnd_cmpl->scsi_status == SAM_STAT_CHECK_CONDITION)
+			atomic64_inc(&fnic_stats->misc_stats.check_condition);
+
 		if (icmnd_cmpl->scsi_status == SAM_STAT_TASK_SET_FULL)
 			atomic64_inc(&fnic_stats->misc_stats.queue_fulls);
 		break;

drivers/scsi/fnic/fnic_stats.h

@@ -88,6 +88,7 @@ struct misc_stats {
 	atomic64_t devrst_cpwq_alloc_failures;
 	atomic64_t io_cpwq_alloc_failures;
 	atomic64_t no_icmnd_itmf_cmpls;
+	atomic64_t check_condition;
 	atomic64_t queue_fulls;
 	atomic64_t rport_not_ready;
 	atomic64_t frame_errors;

drivers/scsi/fnic/fnic_trace.c

@@ -357,6 +357,7 @@ int fnic_get_stats_data(struct stats_debug_info *debug,
 		  "Number of Copy WQ Alloc Failures for Device Reset: %lld\n"
 		  "Number of Copy WQ Alloc Failures for IOs: %lld\n"
 		  "Number of no icmnd itmf Completions: %lld\n"
+		  "Number of Check Conditions encountered: %lld\n"
 		  "Number of QUEUE Fulls: %lld\n"
 		  "Number of rport not ready: %lld\n"
 		  "Number of receive frame errors: %lld\n",
@@ -377,6 +378,7 @@ int fnic_get_stats_data(struct stats_debug_info *debug,
 			  &stats->misc_stats.devrst_cpwq_alloc_failures),
 		  (u64)atomic64_read(&stats->misc_stats.io_cpwq_alloc_failures),
 		  (u64)atomic64_read(&stats->misc_stats.no_icmnd_itmf_cmpls),
+		  (u64)atomic64_read(&stats->misc_stats.check_condition),
 		  (u64)atomic64_read(&stats->misc_stats.queue_fulls),
 		  (u64)atomic64_read(&stats->misc_stats.rport_not_ready),
 		  (u64)atomic64_read(&stats->misc_stats.frame_errors));