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Commit b9dd6524 authored by Sebastian Ott's avatar Sebastian Ott Committed by Martin Schwidefsky
Browse files

s390/cio: add util_string sysfs attribute 



Export utility strings as a chpid's binary sysfs attribute.

Signed-off-by: default avatarSebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: default avatarMartin Schwidefsky <schwidefsky@de.ibm.com>
parent fcc6dd4b

drivers/s390/cio/chp.c

+23 −0
Original line number Diff line number Diff line
@@ -384,6 +384,28 @@ static ssize_t chp_chid_external_show(struct device *dev, 
}

static DEVICE_ATTR(chid_external, 0444, chp_chid_external_show, NULL);



static ssize_t util_string_read(struct file *filp, struct kobject *kobj,

				struct bin_attribute *attr, char *buf,

				loff_t off, size_t count)

{

	struct channel_path *chp = to_channelpath(kobj_to_dev(kobj));

	ssize_t rc;



	mutex_lock(&chp->lock);

	rc = memory_read_from_buffer(buf, count, &off, chp->desc_fmt3.util_str,

				     sizeof(chp->desc_fmt3.util_str));

	mutex_unlock(&chp->lock);



	return rc;

}

static BIN_ATTR_RO(util_string,

		   sizeof(((struct channel_path_desc_fmt3 *)0)->util_str));



static struct bin_attribute *chp_bin_attrs[] = {

	&bin_attr_util_string,

	NULL,

};



static struct attribute *chp_attrs[] = {

	&dev_attr_status.attr,

	&dev_attr_configure.attr,
@@ -396,6 +418,7 @@ static struct attribute *chp_attrs[] = { 
};

static struct attribute_group chp_attr_group = {

	.attrs = chp_attrs,

	.bin_attrs = chp_bin_attrs,

};

static const struct attribute_group *chp_attr_groups[] = {

	&chp_attr_group,