diff options
| -rw-r--r-- | drivers/hwtracing/coresight/coresight-etm4x.c | 11 |
1 files changed, 5 insertions, 6 deletions
diff --git a/drivers/hwtracing/coresight/coresight-etm4x.c b/drivers/hwtracing/coresight/coresight-etm4x.c index 2744413dedb2..92524fe1aa6c 100644 --- a/drivers/hwtracing/coresight/coresight-etm4x.c +++ b/drivers/hwtracing/coresight/coresight-etm4x.c @@ -44,12 +44,11 @@ module_param_named(boot_enable, boot_enable, int, S_IRUGO); static int etm4_count; static struct etmv4_drvdata *etmdrvdata[NR_CPUS]; -static void etm4_os_unlock(void *info) +static void etm4_os_unlock(struct etmv4_drvdata *drvdata) { - struct etmv4_drvdata *drvdata = (struct etmv4_drvdata *)info; - /* Writing any value to ETMOSLAR unlocks the trace registers */ writel_relaxed(0x0, drvdata->base + TRCOSLAR); + drvdata->os_unlock = true; isb(); } @@ -286,6 +285,9 @@ static void etm4_init_arch_data(void *info) u32 etmidr5; struct etmv4_drvdata *drvdata = info; + /* Make sure all registers are accessible */ + etm4_os_unlock(drvdata); + CS_UNLOCK(drvdata->base); /* find all capabilities of the tracing unit */ @@ -603,9 +605,6 @@ static int etm4_probe(struct amba_device *adev, const struct amba_id *id) get_online_cpus(); etmdrvdata[drvdata->cpu] = drvdata; - if (!smp_call_function_single(drvdata->cpu, etm4_os_unlock, drvdata, 1)) - drvdata->os_unlock = true; - if (smp_call_function_single(drvdata->cpu, etm4_init_arch_data, drvdata, 1)) dev_err(dev, "ETM arch init failed\n"); |