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usb-gadget/f_acm: use per-attribute show and store methods

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To simplify the configfs interface and remove boilerplate code that also
causes binary bloat.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Andrzej Pietrasiewicz <andrzej.p@samsung.com>
Acked-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
This commit is contained in:
Christoph Hellwig 2015-10-03 15:32:41 +02:00 committed by Nicholas Bellinger
parent da4e527cd8
commit ea6bd6b14e
1 changed files with 4 additions and 22 deletions
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26
drivers/usb/gadget/function/f_acm.c
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@ -776,21 +776,6 @@ static inline struct f_serial_opts *to_f_serial_opts(struct config_item *item)
func_inst.group);
}
CONFIGFS_ATTR_STRUCT(f_serial_opts);
static ssize_t f_acm_attr_show(struct config_item *item,
struct configfs_attribute *attr,
char *page)
{
struct f_serial_opts *opts = to_f_serial_opts(item);
struct f_serial_opts_attribute *f_serial_opts_attr =
container_of(attr, struct f_serial_opts_attribute, attr);
ssize_t ret = 0;
if (f_serial_opts_attr->show)
ret = f_serial_opts_attr->show(opts, page);
return ret;
}
static void acm_attr_release(struct config_item *item)
{
struct f_serial_opts *opts = to_f_serial_opts(item);
@ -800,20 +785,17 @@ static void acm_attr_release(struct config_item *item)
static struct configfs_item_operations acm_item_ops = {
.release = acm_attr_release,
.show_attribute = f_acm_attr_show,
};
static ssize_t f_acm_port_num_show(struct f_serial_opts *opts, char *page)
static ssize_t f_acm_port_num_show(struct config_item *item, char *page)
{
return sprintf(page, "%u\n", opts->port_num);
return sprintf(page, "%u\n", to_f_serial_opts(item)->port_num);
}
static struct f_serial_opts_attribute f_acm_port_num =
__CONFIGFS_ATTR_RO(port_num, f_acm_port_num_show);
CONFIGFS_ATTR_RO(f_acm_port_, num);
static struct configfs_attribute *acm_attrs[] = {
&f_acm_port_num.attr,
&f_acm_port_attr_num,
NULL,
};