diff options
Diffstat (limited to 'drivers/hwtracing/intel_th/gth.c')
| -rw-r--r-- | drivers/hwtracing/intel_th/gth.c | 18 |
1 files changed, 16 insertions, 2 deletions
diff --git a/drivers/hwtracing/intel_th/gth.c b/drivers/hwtracing/intel_th/gth.c index 9beea0b54231..33e09369a491 100644 --- a/drivers/hwtracing/intel_th/gth.c +++ b/drivers/hwtracing/intel_th/gth.c @@ -22,6 +22,7 @@ #include <linux/mm.h> #include <linux/slab.h> #include <linux/bitmap.h> +#include <linux/pm_runtime.h> #include "intel_th.h" #include "gth.h" @@ -190,6 +191,11 @@ static ssize_t master_attr_store(struct device *dev, if (old_port >= 0) { gth->master[ma->master] = -1; clear_bit(ma->master, gth->output[old_port].master); + + /* + * if the port is active, program this setting, + * implies that runtime PM is on + */ if (gth->output[old_port].output->active) gth_master_set(gth, ma->master, -1); } @@ -204,7 +210,7 @@ static ssize_t master_attr_store(struct device *dev, set_bit(ma->master, gth->output[port].master); - /* if the port is active, program this setting */ + /* if the port is active, program this setting, see above */ if (gth->output[port].output->active) gth_master_set(gth, ma->master, port); } @@ -326,11 +332,15 @@ static ssize_t output_attr_show(struct device *dev, struct gth_device *gth = oa->gth; size_t count; + pm_runtime_get_sync(dev); + spin_lock(>h->gth_lock); count = snprintf(buf, PAGE_SIZE, "%x\n", gth_output_parm_get(gth, oa->port, oa->parm)); spin_unlock(>h->gth_lock); + pm_runtime_put(dev); + return count; } @@ -346,10 +356,14 @@ static ssize_t output_attr_store(struct device *dev, if (kstrtouint(buf, 16, &config) < 0) return -EINVAL; + pm_runtime_get_sync(dev); + spin_lock(>h->gth_lock); gth_output_parm_set(gth, oa->port, oa->parm, config); spin_unlock(>h->gth_lock); + pm_runtime_put(dev); + return count; } @@ -451,7 +465,7 @@ static int intel_th_output_attributes(struct gth_device *gth) } /** - * intel_th_gth_disable() - enable tracing to an output device + * intel_th_gth_disable() - disable tracing to an output device * @thdev: GTH device * @output: output device's descriptor * |