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coresight: perf: deal with error condition properly

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Function coresight_build_path() should return -ENOMEM when kzalloc
fails to allocated the requested memory.  That way callers can deal
with the error condition in a similar way.

Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Mathieu Poirier 2016-09-08 16:50:38 -06:00 committed by Greg Kroah-Hartman
parent 3ba1eb17b6
commit 8e67cdbc2f
2 changed files with 3 additions and 3 deletions
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4
drivers/hwtracing/coresight/coresight-etm-perf.c
View File

@ -135,7 +135,7 @@ static void free_event_data(struct work_struct *work)
}
for_each_cpu(cpu, mask) {
if (event_data->path[cpu])
if (!(IS_ERR_OR_NULL(event_data->path[cpu])))
coresight_release_path(event_data->path[cpu]);
}
@ -220,7 +220,7 @@ static void *etm_setup_aux(int event_cpu, void **pages,
* referenced later when the path is actually needed.
*/
event_data->path[cpu] = coresight_build_path(csdev);
if (!event_data->path[cpu])
if (IS_ERR(event_data->path[cpu]))
goto err;
}

2
drivers/hwtracing/coresight/coresight.c
View File

@ -429,7 +429,7 @@ struct list_head *coresight_build_path(struct coresight_device *csdev)
path = kzalloc(sizeof(struct list_head), GFP_KERNEL);
if (!path)
return NULL;
return ERR_PTR(-ENOMEM);
INIT_LIST_HEAD(path);