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stm class: Fix module init return on allocation failure

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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: 1192918530 ("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.intel.com
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Wang Hui 2021-01-15 22:59:16 +03:00 committed by Greg Kroah-Hartman
parent f583ccebac
commit 225c87b40a
1 changed files with 4 additions and 2 deletions
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6
drivers/hwtracing/stm/heartbeat.c
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@ -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;