diff mbox series

[v2,02/16] bus/fslmc: fix dereferencing null pointer

Message ID 20200306095742.18080-3-hemant.agrawal@nxp.com (mailing list archive)
State Changes Requested, archived
Delegated to: Ferruh Yigit
Headers
Series NXP DPAAx fixes and enhancements |

Checks

Context Check Description
ci/checkpatch success coding style OK
ci/Intel-compilation success Compilation OK

Commit Message

Hemant Agrawal March 6, 2020, 9:57 a.m. UTC 
  From: Apeksha Gupta <apeksha.gupta@nxp.com>

This patch fixees the nxp internal coverity reported
null pointer dereferncing issue.

Fixes: 6fef517e17cf ("bus/fslmc: add qman HW fq query count API")
Cc: stable@dpdk.org

Signed-off-by: Apeksha Gupta <apeksha.gupta@nxp.com>
---
 drivers/bus/fslmc/qbman/qbman_debug.c | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)
diff mbox series

Patch

diff --git a/drivers/bus/fslmc/qbman/qbman_debug.c b/drivers/bus/fslmc/qbman/qbman_debug.c
index 0bb2ce880..34374ae4b 100644
--- a/drivers/bus/fslmc/qbman/qbman_debug.c
+++ b/drivers/bus/fslmc/qbman/qbman_debug.c
@@ -20,26 +20,27 @@  struct qbman_fq_query_desc {
 	uint8_t verb;
 	uint8_t reserved[3];
 	uint32_t fqid;
-	uint8_t reserved2[57];
+	uint8_t reserved2[56];
 };
 
 int qbman_fq_query_state(struct qbman_swp *s, uint32_t fqid,
 			 struct qbman_fq_query_np_rslt *r)
 {
 	struct qbman_fq_query_desc *p;
+	struct qbman_fq_query_np_rslt *var;
 
 	p = (struct qbman_fq_query_desc *)qbman_swp_mc_start(s);
 	if (!p)
 		return -EBUSY;
 
 	p->fqid = fqid;
-	*r = *(struct qbman_fq_query_np_rslt *)qbman_swp_mc_complete(s, p,
-						QBMAN_FQ_QUERY_NP);
-	if (!r) {
+	var = qbman_swp_mc_complete(s, p, QBMAN_FQ_QUERY_NP);
+	if (!var) {
 		pr_err("qbman: Query FQID %d NP fields failed, no response\n",
 		       fqid);
 		return -EIO;
 	}
+	*r = *var;
 
 	/* Decode the outcome */
 	QBMAN_BUG_ON((r->verb & QBMAN_RESPONSE_VERB_MASK) != QBMAN_FQ_QUERY_NP);