net/enic: fix crash on error interrupt

When enic's interrupt handler is called indicating an error, it scans
through the receive queues (RQs) on the adapter looking for errors.
But since the inclusion of rx scatter, some of the RQs may not be in
use, and you shouldn't check them for errors.

Fixes: 856d7ba7ed22 ("net/enic: support scattered Rx")
Signed-off-by: Nelson Escobar <neescoba@cisco.com>
Reviewed-by: John Daley <johndale@cisco.com>

diff --git a/drivers/net/enic/enic_main.c b/drivers/net/enic/enic_main.c
index 329559af855a54bff81ae4970515923b4689cd98..542f0952bed3ca0ef18631d632123ea5a2aba380 100644 (file)
--- a/drivers/net/enic/enic_main.c
+++ b/drivers/net/enic/enic_main.c
@@ -123,6 +123,8 @@ static void enic_log_q_error(struct enic *enic)
        }
 
        for (i = 0; i < enic_vnic_rq_count(enic); i++) {
+               if (!enic->rq[i].in_use)
+                       continue;
                error_status = vnic_rq_error_status(&enic->rq[i]);
                if (error_status)
                        dev_err(enic, "RQ[%d] error_status %d\n", i,