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usb: gadget: config: Remove unused usb_gadget_config_buf 

usb_gadget_config_buf() has been unused since 2012's
commit fa06920a3e ("usb: gadget: Remove File-backed Storage Gadget
(g_file_storage).")

Remove it.

Signed-off-by: "Dr. David Alan Gilbert" <linux@treblig.org>
Link: https://lore.kernel.org/r/20250608233338.179894-2-linux@treblig.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Dr. David Alan Gilbert 2025-06-09 00:33:37 +01:00 committed by Greg Kroah-Hartman
parent bc9a0c68f2
commit efec475e5e
2 changed files with 0 additions and 57 deletions
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53
drivers/usb/gadget/config.c
View File

@ -53,59 +53,6 @@ usb_descriptor_fillbuf(void *buf, unsigned buflen,
}
EXPORT_SYMBOL_GPL(usb_descriptor_fillbuf);
/**
* usb_gadget_config_buf - builts a complete configuration descriptor
* @config: Header for the descriptor, including characteristics such
* as power requirements and number of interfaces.
* @buf: Buffer for the resulting configuration descriptor.
* @length: Length of buffer. If this is not big enough to hold the
* entire configuration descriptor, an error code will be returned.
* @desc: Null-terminated vector of pointers to the descriptors (interface,
* endpoint, etc) defining all functions in this device configuration.
*
* This copies descriptors into the response buffer, building a descriptor
* for that configuration. It returns the buffer length or a negative
* status code. The config.wTotalLength field is set to match the length
* of the result, but other descriptor fields (including power usage and
* interface count) must be set by the caller.
*
* Gadget drivers could use this when constructing a config descriptor
* in response to USB_REQ_GET_DESCRIPTOR. They will need to patch the
* resulting bDescriptorType value if USB_DT_OTHER_SPEED_CONFIG is needed.
*/
int usb_gadget_config_buf(
const struct usb_config_descriptor *config,
void *buf,
unsigned length,
const struct usb_descriptor_header **desc
)
{
struct usb_config_descriptor *cp = buf;
int len;
/* config descriptor first */
if (length < USB_DT_CONFIG_SIZE || !desc)
return -EINVAL;
*cp = *config;
/* then interface/endpoint/class/vendor/... */
len = usb_descriptor_fillbuf(USB_DT_CONFIG_SIZE + (u8 *)buf,
length - USB_DT_CONFIG_SIZE, desc);
if (len < 0)
return len;
len += USB_DT_CONFIG_SIZE;
if (len > 0xffff)
return -EINVAL;
/* patch up the config descriptor */
cp->bLength = USB_DT_CONFIG_SIZE;
cp->bDescriptorType = USB_DT_CONFIG;
cp->wTotalLength = cpu_to_le16(len);
cp->bmAttributes |= USB_CONFIG_ATT_ONE;
return len;
}
EXPORT_SYMBOL_GPL(usb_gadget_config_buf);
/**
* usb_copy_descriptors - copy a vector of USB descriptors
* @src: null-terminated vector to copy

4
include/linux/usb/gadget.h
View File

@ -860,10 +860,6 @@ container_of(str_item, struct gadget_string, item)
int usb_descriptor_fillbuf(void *, unsigned,
const struct usb_descriptor_header **);
/* build config descriptor from single descriptor vector */
int usb_gadget_config_buf(const struct usb_config_descriptor *config,
void *buf, unsigned buflen, const struct usb_descriptor_header **desc);
/* copy a NULL-terminated vector of descriptors */
struct usb_descriptor_header **usb_copy_descriptors(
struct usb_descriptor_header **);