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usb: gadget: configfs: change config attributes file operation

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in order to add trace event in configfs function with same
struct gadget_info *gi parameter,
add struct config_usb_cfg *cfg variable in below functions,
gadget_config_desc_MaxPower_show(),
gadget_config_desc_MaxPower_store(),
gadget_config_desc_bmAttributes_show(),
gadget_config_desc_bmAttributes_store(),
this allow following patch easy change cfg to gi with helper function
cfg_to_gadget_info().

Signed-off-by: Linyu Yuan <quic_linyyuan@quicinc.com>
Link: https://lore.kernel.org/r/1634649997-28745-3-git-send-email-quic_linyyuan@quicinc.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Linyu Yuan 2021-10-19 21:26:35 +08:00 committed by Greg Kroah-Hartman
parent 260d88b79c
commit c26f1c109d
1 changed files with 10 additions and 5 deletions
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15
drivers/usb/gadget/configfs.c
View file

@ -508,12 +508,15 @@ static struct configfs_item_operations gadget_config_item_ops = {
static ssize_t gadget_config_desc_MaxPower_show(struct config_item *item,
char *page)
{
return sprintf(page, "%u\n", to_config_usb_cfg(item)->c.MaxPower);
struct config_usb_cfg *cfg = to_config_usb_cfg(item);
return sprintf(page, "%u\n", cfg->c.MaxPower);
}
static ssize_t gadget_config_desc_MaxPower_store(struct config_item *item,
const char *page, size_t len)
{
struct config_usb_cfg *cfg = to_config_usb_cfg(item);
u16 val;
int ret;
ret = kstrtou16(page, 0, &val);
@ -521,20 +524,22 @@ static ssize_t gadget_config_desc_MaxPower_store(struct config_item *item,
return ret;
if (DIV_ROUND_UP(val, 8) > 0xff)
return -ERANGE;
to_config_usb_cfg(item)->c.MaxPower = val;
cfg->c.MaxPower = val;
return len;
}
static ssize_t gadget_config_desc_bmAttributes_show(struct config_item *item,
char *page)
{
return sprintf(page, "0x%02x\n",
to_config_usb_cfg(item)->c.bmAttributes);
struct config_usb_cfg *cfg = to_config_usb_cfg(item);
return sprintf(page, "0x%02x\n", cfg->c.bmAttributes);
}
static ssize_t gadget_config_desc_bmAttributes_store(struct config_item *item,
const char *page, size_t len)
{
struct config_usb_cfg *cfg = to_config_usb_cfg(item);
u8 val;
int ret;
ret = kstrtou8(page, 0, &val);
@ -545,7 +550,7 @@ static ssize_t gadget_config_desc_bmAttributes_store(struct config_item *item,
if (val & ~(USB_CONFIG_ATT_ONE | USB_CONFIG_ATT_SELFPOWER |
USB_CONFIG_ATT_WAKEUP))
return -EINVAL;
to_config_usb_cfg(item)->c.bmAttributes = val;
cfg->c.bmAttributes = val;
return len;
}