From: Intiyaz Basha <intiyaz.basha@cavium.com>
Date: Fri, 18 Aug 2017 20:07:19 +0000 (-0700)
Subject: liquidio: fix Smatch error
X-Git-Tag: v4.14-rc1~130^2~209
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=d2896116dbc7be7cabd5db414e008aef4a5e0a00;p=platform%2Fkernel%2Flinux-rpi3.git

liquidio: fix Smatch error

Fix Smatch error by not dereferencing iq pointer if it's NULL.

See http://marc.info/?l=kernel-janitors&m=150296723301129&w=2

Also, remove unnecessary parentheses.

Fixes: d314ac222829 ("liquidio: moved liquidio_napi_poll to lio_core.c")
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Intiyaz Basha <intiyaz.basha@cavium.com>
Signed-off-by: Felix Manlunas <felix.manlunas@cavium.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/drivers/net/ethernet/cavium/liquidio/lio_core.c b/drivers/net/ethernet/cavium/liquidio/lio_core.c
index d4f0646..0e7896c 100644
--- a/drivers/net/ethernet/cavium/liquidio/lio_core.c
+++ b/drivers/net/ethernet/cavium/liquidio/lio_core.c
@@ -668,8 +668,8 @@ static int liquidio_napi_poll(struct napi_struct *napi, int budget)
 
 #define MAX_REG_CNT  2000000U
 	/* force enable interrupt if reg cnts are high to avoid wraparound */
-	if (((work_done < budget) && (tx_done)) ||
-	    (iq->pkt_in_done >= MAX_REG_CNT) ||
+	if ((work_done < budget && tx_done) ||
+	    (iq && iq->pkt_in_done >= MAX_REG_CNT) ||
 	    (droq->pkt_count >= MAX_REG_CNT)) {
 		tx_done = 1;
 		napi_complete_done(napi, work_done);