| Message ID | 20230519052149.1367814-7-anshuman.khandual@arm.com |
|---|---|
| State | Superseded |
| Headers | show |
| Series | coresight: etm4x: Migrate ACPI AMBA devices to platform driver | expand |
On 5/19/23 18:10, Suzuki K Poulose wrote: > On 19/05/2023 06:21, Anshuman Khandual wrote: >> 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 <anshuman.khandual@arm.com> > > 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. > > Suzuki > > >> --- >> 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) >
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)