From 5dee0eaa3a3c1f6b8e960038384e16ae730d201e Mon Sep 17 00:00:00 2001
From: Kamal Heib <kamalheib1@gmail.com>
Date: Thu, 24 Dec 2020 16:11:16 +0200
Subject: [PATCH] cxgb4: Fix reported error code from create_cq

[ Upstream commit 8f85e04863e379d798c88a68eee5e34341961eff ]

Report EINVAL when trying to call c4iw_create_cq() with number of CQEs
out of the supported range.

Fixes: d6e6ae69be5e ("Add libcxgb4 files.")
Signed-off-by: Kamal Heib <kamalheib1@gmail.com>
Signed-off-by: Nicolas Morey-Chaisemartin <nmoreychaisemartin@suse.com>
---
 providers/cxgb4/verbs.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/providers/cxgb4/verbs.c b/providers/cxgb4/verbs.c
index 32bae6906a15..d0e366f0fca4 100644
--- a/providers/cxgb4/verbs.c
+++ b/providers/cxgb4/verbs.c
@@ -171,6 +171,11 @@ struct ibv_cq *c4iw_create_cq(struct ibv_context *context, int cqe,
 	struct c4iw_dev *dev = to_c4iw_dev(context->device);
 	int ret;
 
+	if (!cqe || cqe > T4_MAX_CQ_DEPTH) {
+		errno = EINVAL;
+		return NULL;
+	}
+
 	chp = calloc(1, sizeof *chp);
 	if (!chp) {
 		return NULL;
-- 
2.25.4