From: Wang Hui john.wanghui@huawei.com
commit 927633a6d20af319d986f3e42c3ef9f6d7835008 upstream.
In stm_heartbeat_init(): return value gets reset after the first iteration by stm_source_register_device(), so allocation failures after that will, after a clean up, return success. Fix that.
Fixes: 119291853038 ("stm class: Add heartbeat stm source device") Reported-by: Hulk Robot hulkci@huawei.com Signed-off-by: Wang Hui john.wanghui@huawei.com Signed-off-by: Alexander Shishkin alexander.shishkin@linux.intel.com Link: https://lore.kernel.org/r/20210115195917.3184-2-alexander.shishkin@linux.int... Cc: stable stable@vger.kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- 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 7db42395e1316..825c59a77a0e0 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;