[Intel-gfx] [PATCH] drm/i915/gt: Use sysfs_emit() and sysfs_emit_at()

[Rodrigo Vivi]

On Mon, Jan 30, 2023 at 02:13:58PM +0100, Nirmoy Das wrote:
> Use sysfs_emit() and sysfs_emit_at() in show() callback
> as recommended by Documentation/filesystems/sysfs.rst
> 
> Cc: Andi Shyti <andi.shyti at linux.intel.com>
> Signed-off-by: Nirmoy Das <nirmoy.das at intel.com>

Reviewed-by: Rodrigo Vivi <rodrigo.vivi at intel.com>

> ---
>  drivers/gpu/drm/i915/gt/sysfs_engines.c | 34 ++++++++++++-------------
>  1 file changed, 16 insertions(+), 18 deletions(-)
> 
> diff --git a/drivers/gpu/drm/i915/gt/sysfs_engines.c b/drivers/gpu/drm/i915/gt/sysfs_engines.c
> index f2d9858d827c..323cead181b8 100644
> --- a/drivers/gpu/drm/i915/gt/sysfs_engines.c
> +++ b/drivers/gpu/drm/i915/gt/sysfs_engines.c
> @@ -24,7 +24,7 @@ static struct intel_engine_cs *kobj_to_engine(struct kobject *kobj)
>  static ssize_t
>  name_show(struct kobject *kobj, struct kobj_attribute *attr, char *buf)
>  {
> -	return sprintf(buf, "%s\n", kobj_to_engine(kobj)->name);
> +	return sysfs_emit(buf, "%s\n", kobj_to_engine(kobj)->name);
>  }
>  
>  static struct kobj_attribute name_attr =
> @@ -33,7 +33,7 @@ __ATTR(name, 0444, name_show, NULL);
>  static ssize_t
>  class_show(struct kobject *kobj, struct kobj_attribute *attr, char *buf)
>  {
> -	return sprintf(buf, "%d\n", kobj_to_engine(kobj)->uabi_class);
> +	return sysfs_emit(buf, "%d\n", kobj_to_engine(kobj)->uabi_class);
>  }
>  
>  static struct kobj_attribute class_attr =
> @@ -42,7 +42,7 @@ __ATTR(class, 0444, class_show, NULL);
>  static ssize_t
>  inst_show(struct kobject *kobj, struct kobj_attribute *attr, char *buf)
>  {
> -	return sprintf(buf, "%d\n", kobj_to_engine(kobj)->uabi_instance);
> +	return sysfs_emit(buf, "%d\n", kobj_to_engine(kobj)->uabi_instance);
>  }
>  
>  static struct kobj_attribute inst_attr =
> @@ -51,7 +51,7 @@ __ATTR(instance, 0444, inst_show, NULL);
>  static ssize_t
>  mmio_show(struct kobject *kobj, struct kobj_attribute *attr, char *buf)
>  {
> -	return sprintf(buf, "0x%x\n", kobj_to_engine(kobj)->mmio_base);
> +	return sysfs_emit(buf, "0x%x\n", kobj_to_engine(kobj)->mmio_base);
>  }
>  
>  static struct kobj_attribute mmio_attr =
> @@ -107,11 +107,9 @@ __caps_show(struct intel_engine_cs *engine,
>  	for_each_set_bit(n, &caps, show_unknown ? BITS_PER_LONG : count) {
>  		if (n >= count || !repr[n]) {
>  			if (GEM_WARN_ON(show_unknown))
> -				len += snprintf(buf + len, PAGE_SIZE - len,
> -						"[%x] ", n);
> +				len += sysfs_emit_at(buf, len, "[%x] ", n);
>  		} else {
> -			len += snprintf(buf + len, PAGE_SIZE - len,
> -					"%s ", repr[n]);
> +			len += sysfs_emit_at(buf, len, "%s ", repr[n]);
>  		}
>  		if (GEM_WARN_ON(len >= PAGE_SIZE))
>  			break;
> @@ -182,7 +180,7 @@ max_spin_show(struct kobject *kobj, struct kobj_attribute *attr, char *buf)
>  {
>  	struct intel_engine_cs *engine = kobj_to_engine(kobj);
>  
> -	return sprintf(buf, "%lu\n", engine->props.max_busywait_duration_ns);
> +	return sysfs_emit(buf, "%lu\n", engine->props.max_busywait_duration_ns);
>  }
>  
>  static struct kobj_attribute max_spin_attr =
> @@ -193,7 +191,7 @@ max_spin_default(struct kobject *kobj, struct kobj_attribute *attr, char *buf)
>  {
>  	struct intel_engine_cs *engine = kobj_to_engine(kobj);
>  
> -	return sprintf(buf, "%lu\n", engine->defaults.max_busywait_duration_ns);
> +	return sysfs_emit(buf, "%lu\n", engine->defaults.max_busywait_duration_ns);
>  }
>  
>  static struct kobj_attribute max_spin_def =
> @@ -236,7 +234,7 @@ timeslice_show(struct kobject *kobj, struct kobj_attribute *attr, char *buf)
>  {
>  	struct intel_engine_cs *engine = kobj_to_engine(kobj);
>  
> -	return sprintf(buf, "%lu\n", engine->props.timeslice_duration_ms);
> +	return sysfs_emit(buf, "%lu\n", engine->props.timeslice_duration_ms);
>  }
>  
>  static struct kobj_attribute timeslice_duration_attr =
> @@ -247,7 +245,7 @@ timeslice_default(struct kobject *kobj, struct kobj_attribute *attr, char *buf)
>  {
>  	struct intel_engine_cs *engine = kobj_to_engine(kobj);
>  
> -	return sprintf(buf, "%lu\n", engine->defaults.timeslice_duration_ms);
> +	return sysfs_emit(buf, "%lu\n", engine->defaults.timeslice_duration_ms);
>  }
>  
>  static struct kobj_attribute timeslice_duration_def =
> @@ -287,7 +285,7 @@ stop_show(struct kobject *kobj, struct kobj_attribute *attr, char *buf)
>  {
>  	struct intel_engine_cs *engine = kobj_to_engine(kobj);
>  
> -	return sprintf(buf, "%lu\n", engine->props.stop_timeout_ms);
> +	return sysfs_emit(buf, "%lu\n", engine->props.stop_timeout_ms);
>  }
>  
>  static struct kobj_attribute stop_timeout_attr =
> @@ -298,7 +296,7 @@ stop_default(struct kobject *kobj, struct kobj_attribute *attr, char *buf)
>  {
>  	struct intel_engine_cs *engine = kobj_to_engine(kobj);
>  
> -	return sprintf(buf, "%lu\n", engine->defaults.stop_timeout_ms);
> +	return sysfs_emit(buf, "%lu\n", engine->defaults.stop_timeout_ms);
>  }
>  
>  static struct kobj_attribute stop_timeout_def =
> @@ -343,7 +341,7 @@ preempt_timeout_show(struct kobject *kobj, struct kobj_attribute *attr,
>  {
>  	struct intel_engine_cs *engine = kobj_to_engine(kobj);
>  
> -	return sprintf(buf, "%lu\n", engine->props.preempt_timeout_ms);
> +	return sysfs_emit(buf, "%lu\n", engine->props.preempt_timeout_ms);
>  }
>  
>  static struct kobj_attribute preempt_timeout_attr =
> @@ -355,7 +353,7 @@ preempt_timeout_default(struct kobject *kobj, struct kobj_attribute *attr,
>  {
>  	struct intel_engine_cs *engine = kobj_to_engine(kobj);
>  
> -	return sprintf(buf, "%lu\n", engine->defaults.preempt_timeout_ms);
> +	return sysfs_emit(buf, "%lu\n", engine->defaults.preempt_timeout_ms);
>  }
>  
>  static struct kobj_attribute preempt_timeout_def =
> @@ -399,7 +397,7 @@ heartbeat_show(struct kobject *kobj, struct kobj_attribute *attr, char *buf)
>  {
>  	struct intel_engine_cs *engine = kobj_to_engine(kobj);
>  
> -	return sprintf(buf, "%lu\n", engine->props.heartbeat_interval_ms);
> +	return sysfs_emit(buf, "%lu\n", engine->props.heartbeat_interval_ms);
>  }
>  
>  static struct kobj_attribute heartbeat_interval_attr =
> @@ -410,7 +408,7 @@ heartbeat_default(struct kobject *kobj, struct kobj_attribute *attr, char *buf)
>  {
>  	struct intel_engine_cs *engine = kobj_to_engine(kobj);
>  
> -	return sprintf(buf, "%lu\n", engine->defaults.heartbeat_interval_ms);
> +	return sysfs_emit(buf, "%lu\n", engine->defaults.heartbeat_interval_ms);
>  }
>  
>  static struct kobj_attribute heartbeat_interval_def =
> -- 
> 2.39.0
>