[SCSI] fnic: Kernel panic due to FIP mode misconfiguration

If switch configured in FIP and adapter configured in non-fip mode, driver
panics while queueing FIP frame in non-existing fip_frame_queue. Added config
check before queueing FIP frame in misconfiguration case to avoid kernel panic.

Signed-off-by: Hiral Patel <hiralpat@cisco.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>

diff --git a/drivers/scsi/fnic/fnic_fcs.c b/drivers/scsi/fnic/fnic_fcs.c
index 34a0b7d..006fa92 100644 (file)
--- a/drivers/scsi/fnic/fnic_fcs.c
+++ b/drivers/scsi/fnic/fnic_fcs.c
@@ -603,6 +603,12 @@ static inline int fnic_import_rq_eth_pkt(struct fnic *fnic, struct sk_buff *skb)
                skb_reset_mac_header(skb);
        }
        if (eh->h_proto == htons(ETH_P_FIP)) {
+               if (!(fnic->config.flags & VFCF_FIP_CAPABLE)) {
+                       printk(KERN_ERR "Dropped FIP frame, as firmware "
+                                       "uses non-FIP mode, Enable FIP "
+                                       "using UCSM\n");
+                       goto drop;
+               }
                skb_queue_tail(&fnic->fip_frame_queue, skb);
                queue_work(fnic_fip_queue, &fnic->fip_frame_work);
                return 1;               /* let caller know packet was used */