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coresight: platform: acpi: Ignore the absence of graph

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Some components may not have graph connections for describing
the trace path. e.g., ETE, where it could directly use the per
CPU TRBE. Ignore the absence of graph connections

Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com>
Link: https://lore.kernel.org/r/20230710062500.45147-6-anshuman.khandual@arm.com
This commit is contained in:
Suzuki K Poulose 2023-07-10 11:54:59 +05:30
parent 73d779a03a
commit 3a2888aa1f
1 changed files with 5 additions and 1 deletions
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6
drivers/hwtracing/coresight/coresight-platform.c
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@ -667,8 +667,12 @@ static int acpi_coresight_parse_graph(struct device *dev,
struct coresight_connection *new_conn;
graph = acpi_get_coresight_graph(adev);
/*
* There are no graph connections, which is fine for some components.
* e.g., ETE
*/
if (!graph)
return -ENOENT;
return 0;
nlinks = graph->package.elements[2].integer.value;
if (!nlinks)