coresight: core: Fix use of uninitialized pointer

[ Upstream commit d777a8991847729ec4e2a13fcad58c2b00bb19dc ]

Currently the pointer "sink" might be checked before initialized. Fix
this by initializing this pointer.

Link: https://lore.kernel.org/r/1620912469-52222-2-git-send-email-liuqi115@huawei.com
Fixes: 6d578258b955 ("coresight: Make sysfs functional on topologies with per core sink")
Signed-off-by: Junhao He <hejunhao2@hisilicon.com>
Signed-off-by: Qi Liu <liuqi115@huawei.com>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Link: https://lore.kernel.org/r/20210614175901.532683-3-mathieu.poirier@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/hwtracing/coresight/coresight-core.c b/drivers/hwtracing/coresight/coresight-core.c
index 0062c893565300ac7524c0319ba4829159087e32..237a8c0d6c244944b653de8b7d347a39219c1583 100644 (file)
--- a/drivers/hwtracing/coresight/coresight-core.c
+++ b/drivers/hwtracing/coresight/coresight-core.c
@@ -595,7 +595,7 @@ static struct coresight_device *
 coresight_find_enabled_sink(struct coresight_device *csdev)
 {
        int i;
-       struct coresight_device *sink;
+       struct coresight_device *sink = NULL;
 
        if ((csdev->type == CORESIGHT_DEV_TYPE_SINK ||
             csdev->type == CORESIGHT_DEV_TYPE_LINKSINK) &&