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usb-gadget: 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 15:32:38 +02:00
committed by Nicholas Bellinger
parent 870823e629
commit 45b6a73f62
2 changed files with 119 additions and 197 deletions
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19
include/linux/usb/gadget_configfs.h
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@@ -7,9 +7,10 @@ int check_user_usb_string(const char *name,
struct usb_gadget_strings *stringtab_dev);
#define GS_STRINGS_W(__struct, __name) \
static ssize_t __struct##_##__name##_store(struct __struct *gs, \
static ssize_t __struct##_##__name##_store(struct config_item *item, \
const char *page, size_t len) \
{ \
struct __struct *gs = to_##__struct(item); \
int ret; \
\
ret = usb_string_copy(page, &gs->__name); \
@@ -19,30 +20,20 @@ int check_user_usb_string(const char *name,
}
#define GS_STRINGS_R(__struct, __name) \
static ssize_t __struct##_##__name##_show(struct __struct *gs, \
char *page) \
static ssize_t __struct##_##__name##_show(struct config_item *item, char *page) \
{ \
struct __struct *gs = to_##__struct(item); \
return sprintf(page, "%s\n", gs->__name ?: ""); \
}
#define GS_STRING_ITEM_ATTR(struct_name, name) \
static struct struct_name##_attribute struct_name##_##name = \
__CONFIGFS_ATTR(name, S_IRUGO | S_IWUSR, \
struct_name##_##name##_show, \
struct_name##_##name##_store)
#define GS_STRINGS_RW(struct_name, _name) \
GS_STRINGS_R(struct_name, _name) \
GS_STRINGS_W(struct_name, _name) \
GS_STRING_ITEM_ATTR(struct_name, _name)
CONFIGFS_ATTR(struct_name##_, _name)
#define USB_CONFIG_STRING_RW_OPS(struct_in) \
CONFIGFS_ATTR_OPS(struct_in); \
\
static struct configfs_item_operations struct_in##_langid_item_ops = { \
.release = struct_in##_attr_release, \
.show_attribute = struct_in##_attr_show, \
.store_attribute = struct_in##_attr_store, \
}; \
\
static struct config_item_type struct_in##_langid_type = { \