linux-kernel - [PATCH -next] stm class: dummy_stm: fix error return code in dummy_stm

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Message-ID: <20200428135019.78920-1-weiyongjun1@huawei.com>
Date:   Tue, 28 Apr 2020 13:50:19 +0000
From:   Wei Yongjun <weiyongjun1@...wei.com>
To:     Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Maxime Coquelin <mcoquelin.stm32@...il.com>,
        Alexandre Torgue <alexandre.torgue@...com>
CC:     Wei Yongjun <weiyongjun1@...wei.com>,
        <linux-stm32@...md-mailman.stormreply.com>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>, <kernel-janitors@...r.kernel.org>
Subject: [PATCH -next] stm class: dummy_stm: fix error return code in dummy_stm_init()

Fix to return error code -ENOMEM from the error handling case instead
of 0(ret can be overwritted to 0 in for loop).

Signed-off-by: Wei Yongjun <weiyongjun1@...wei.com>
---
 drivers/hwtracing/stm/dummy_stm.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/hwtracing/stm/dummy_stm.c b/drivers/hwtracing/stm/dummy_stm.c
index 38528ffdc0b3..36d32e7afb35 100644
--- a/drivers/hwtracing/stm/dummy_stm.c
+++ b/drivers/hwtracing/stm/dummy_stm.c
@@ -68,7 +68,7 @@ static int dummy_stm_link(struct stm_data *data, unsigned int master,
 
 static int dummy_stm_init(void)
 {
-	int i, ret = -ENOMEM;
+	int i, ret;
 
 	if (nr_dummies < 0 || nr_dummies > DUMMY_STM_MAX)
 		return -EINVAL;
@@ -80,8 +80,10 @@ static int dummy_stm_init(void)
 
 	for (i = 0; i < nr_dummies; i++) {
 		dummy_stm[i].name = kasprintf(GFP_KERNEL, "dummy_stm.%d", i);
-		if (!dummy_stm[i].name)
+		if (!dummy_stm[i].name) {
+			ret = -ENOMEM;
 			goto fail_unregister;
+		}
 
 		dummy_stm[i].sw_start		= master_min;
 		dummy_stm[i].sw_end		= master_max;