Greg Kroah-Hartman wrote:
There's no need to special-case the dp0 sysfs attributes, the is_visible() callback in the attribute group can handle that for us, so add that and add it to the attribute group list making the logic simpler overall.
This is a step on the way to moving all of the sysfs attribute handling into the default driver core attribute group logic so that the soundwire core does not have to do any of it manually.
Cc: Vinod Koul vkoul@kernel.org Cc: Bard Liao yung-chuan.liao@linux.intel.com Cc: Pierre-Louis Bossart pierre-louis.bossart@linux.intel.com Cc: Sanyog Kale sanyog.r.kale@intel.com Cc: alsa-devel@alsa-project.org Cc: linux-kernel@vger.kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
drivers/soundwire/sysfs_slave.c | 28 ++++++++++++++++++++++------ 1 file changed, 22 insertions(+), 6 deletions(-)
diff --git a/drivers/soundwire/sysfs_slave.c b/drivers/soundwire/sysfs_slave.c index 83e3f6cc3250..8876c7807048 100644 --- a/drivers/soundwire/sysfs_slave.c +++ b/drivers/soundwire/sysfs_slave.c @@ -184,18 +184,40 @@ static struct attribute *dp0_attrs[] = { NULL, };
+static umode_t dp0_attr_visible(struct kobject *kobj, struct attribute *attr,
int n)+{
- struct sdw_slave *slave = dev_to_sdw_dev(kobj_to_dev(kobj));
- if (slave->prop.dp0_prop)
return attr->mode;- return 0;
+}
+static bool dp0_group_visible(struct kobject *kobj) +{
- struct sdw_slave *slave = dev_to_sdw_dev(kobj_to_dev(kobj));
- if (slave->prop.dp0_prop)
return true;- return false;
+} +DEFINE_SYSFS_GROUP_VISIBLE(dp0);
What do you think of the following for cases like these where attr_visible is trivially derivable from group_visible?
diff --git a/include/linux/sysfs.h b/include/linux/sysfs.h index a42642b277dd..203d2e7e9a1e 100644 --- a/include/linux/sysfs.h +++ b/include/linux/sysfs.h @@ -117,6 +117,15 @@ struct attribute_group { return name##_attr_visible(kobj, attr, n); \ }
+#define DEFINE_SIMPLE_SYSFS_GROUP_VISIBLE(name) \ + static inline umode_t sysfs_group_visible_##name( \ + struct kobject *kobj, struct attribute *a, int n) \ + { \ + if (n == 0 && !name##_group_visible(kobj)) \ + return SYSFS_GROUP_INVISIBLE; \ + return a->mode; \ + } + /* * Same as DEFINE_SYSFS_GROUP_VISIBLE, but for groups with only binary * attributes
...i.e. don't require $prefix_attr_visible() to be defined?
With or without that:
Reviewed-by: Dan Williams dan.j.williams@intel.com