From: Dan Carpenter <dan.carpenter@oracle.com>
Date: Thu, 22 Apr 2021 09:10:28 +0000 (+0300)
Subject: bnxt_en: fix ternary sign extension bug in bnxt_show_temp()
X-Git-Tag: v5.11.21~38
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=df40a70f6556d4c529e8edeaf5c947e4963f402a;p=thirdparty%2Fkernel%2Fstable.git

bnxt_en: fix ternary sign extension bug in bnxt_show_temp()

[ Upstream commit 27537929f30d3136a71ef29db56127a33c92dad7 ]

The problem is that bnxt_show_temp() returns long but "rc" is an int
and "len" is a u32.  With ternary operations the type promotion is quite
tricky.  The negative "rc" is first promoted to u32 and then to long so
it ends up being a high positive value instead of a a negative as we
intended.

Fix this by removing the ternary.

Fixes: d69753fa1ecb ("bnxt_en: return proper error codes in bnxt_show_temp")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---

diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.c b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
index 80819d8fddb4b..11839f086f298 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
@@ -9546,7 +9546,9 @@ static ssize_t bnxt_show_temp(struct device *dev,
 	if (!rc)
 		len = sprintf(buf, "%u\n", resp->temp * 1000); /* display millidegree */
 	mutex_unlock(&bp->hwrm_cmd_lock);
-	return rc ?: len;
+	if (rc)
+		return rc;
+	return len;
 }
 static SENSOR_DEVICE_ATTR(temp1_input, 0444, bnxt_show_temp, NULL, 0);