netdev - [PATCH net 4/5] bnxt_en: Return error when allocating zero size context memory.

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Message-Id: <1587932682-1212-5-git-send-email-michael.chan@broadcom.com>
Date:   Sun, 26 Apr 2020 16:24:41 -0400
From:   Michael Chan <michael.chan@...adcom.com>
To:     davem@...emloft.net
Cc:     netdev@...r.kernel.org
Subject: [PATCH net 4/5] bnxt_en: Return error when allocating zero size context memory.

bnxt_alloc_ctx_pg_tbls() should return error when the memory size of the
context memory to set up is zero.  By returning success (0), the caller
may proceed normally and may crash later when it tries to set up the
memory.

Fixes: 08fe9d181606 ("bnxt_en: Add Level 2 context memory paging support.")
Signed-off-by: Michael Chan <michael.chan@...adcom.com>
---
 drivers/net/ethernet/broadcom/bnxt/bnxt.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.c b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
index d8db08e..070c42d 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
@@ -6642,7 +6642,7 @@ static int bnxt_alloc_ctx_pg_tbls(struct bnxt *bp,
 	int rc;

 	if (!mem_size)
-		return 0;
+		return -EINVAL;

 	ctx_pg->nr_pages = DIV_ROUND_UP(mem_size, BNXT_PAGE_SIZE);
 	if (ctx_pg->nr_pages > MAX_CTX_TOTAL_PAGES) {
-- 
2.5.1