[PATCH] hwtracing: stm: fix return value of error branch in stm_heartbeat_init

[Wang Hui]

ret would be reset by stm_source_register_device after first loop, so we
should reassign ret while allocation failed for
stm_heartbeat[i].data.name

Reported-by: Hulk Robot <hul...@huawei.com>
Fixes: 119291853038 ("stm class: Add heartbeat stm source device")
Signed-off-by: Wang Hui <john.wang...@huawei.com>
---
 drivers/hwtracing/stm/heartbeat.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/hwtracing/stm/heartbeat.c 
b/drivers/hwtracing/stm/heartbeat.c
index 3e7df1c0477f..81d7b21d31ec 100644
--- a/drivers/hwtracing/stm/heartbeat.c
+++ b/drivers/hwtracing/stm/heartbeat.c
@@ -64,7 +64,7 @@ static void stm_heartbeat_unlink(struct stm_source_data *data)
 
 static int stm_heartbeat_init(void)
 {
-       int i, ret = -ENOMEM;
+       int i, ret;
 
        if (nr_devs < 0 || nr_devs > STM_HEARTBEAT_MAX)
                return -EINVAL;
@@ -72,8 +72,10 @@ static int stm_heartbeat_init(void)
        for (i = 0; i < nr_devs; i++) {
                stm_heartbeat[i].data.name =
                        kasprintf(GFP_KERNEL, "heartbeat.%d", i);
-               if (!stm_heartbeat[i].data.name)
+               if (!stm_heartbeat[i].data.name) {
+                       ret = -ENOMEM;
                        goto fail_unregister;
+               }
 
                stm_heartbeat[i].data.nr_chans  = 1;
                stm_heartbeat[i].data.link      = stm_heartbeat_link;
-- 
2.29.0