etm4_init_arch_data is called early during the device probe, even before the coresight_device is registered. Since we are about to replace the direct access via abstraction layer, we need a way to pass in the csdev_access for the given device. Towards this free up the argument, which is already available via etmdrvdata[smp_processor_id()].
Cc: Mathieu Poirier mathieu.poirier@linaro.org Cc: Mike Leach mike.leach@linaro.org Signed-off-by: Suzuki K Poulose suzuki.poulose@arm.com --- drivers/hwtracing/coresight/coresight-etm4x.c | 15 +++++++++++---- 1 file changed, 11 insertions(+), 4 deletions(-)
diff --git a/drivers/hwtracing/coresight/coresight-etm4x.c b/drivers/hwtracing/coresight/coresight-etm4x.c index 7bb74c659c4f..67deb4a4e618 100644 --- a/drivers/hwtracing/coresight/coresight-etm4x.c +++ b/drivers/hwtracing/coresight/coresight-etm4x.c @@ -614,7 +614,8 @@ static const struct coresight_ops etm4_cs_ops = { .source_ops = &etm4_source_ops, };
-static void etm4_init_arch_data(void *info) + +static void etm4_init_arch_data(void *__unused) { u32 etmidr0; u32 etmidr1; @@ -622,8 +623,14 @@ static void etm4_init_arch_data(void *info) u32 etmidr3; u32 etmidr4; u32 etmidr5; - struct etmv4_drvdata *drvdata = info; - int i; + struct etmv4_drvdata *drvdata; + int i, cpu; + + cpu = raw_smp_processor_id(); + drvdata = etmdrvdata[cpu]; + + if (WARN_ON(!etmdrvdata[cpu])) + return;
/* Make sure all registers are accessible */ etm4_os_unlock(drvdata); @@ -1517,7 +1524,7 @@ static int etm4_probe(struct amba_device *adev, const struct amba_id *id) etmdrvdata[drvdata->cpu] = drvdata;
if (smp_call_function_single(drvdata->cpu, - etm4_init_arch_data, drvdata, 1)) + etm4_init_arch_data, NULL, 1)) dev_err(dev, "ETM arch init failed\n");
ret = etm4_pm_setup_cpuslocked();