Re: [PATCH V3 6/6] coresight: platform: acpi: Ignore the absence of graph
From: Anshuman Khandual <hidden>
Date: 2023-05-23 02:46:32
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On 5/19/23 18:10, Suzuki K Poulose wrote:
On 19/05/2023 06:21, Anshuman Khandual wrote:quoted
From: Suzuki K Poulose <suzuki.poulose@arm.com> 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 <redacted>Please could you move this before the Patch 5, where we add ACPI support for etm4x with system instructions ? That way the support is up with that patch, without an error that is fixed by this patch.
Sure, will move it before adding the ACPI support patch.
Suzukiquoted
--- drivers/hwtracing/coresight/coresight-platform.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-)diff --git a/drivers/hwtracing/coresight/coresight-platform.c b/drivers/hwtracing/coresight/coresight-platform.c index 475899714104..c4b4fbde8550 100644 --- a/drivers/hwtracing/coresight/coresight-platform.c +++ b/drivers/hwtracing/coresight/coresight-platform.c@@ -692,8 +692,12 @@ static int acpi_coresight_parse_graph(struct acpi_device *adev,pdata->nr_inport = pdata->nr_outport = 0; 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)
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