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git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
usb: gadget: config: Remove unused usb_gadget_config_buf
usb_gadget_config_buf() has been unused since 2012's
commit fa06920a3ece ("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>
authored by
Dr. David Alan Gilbert
and committed by
Greg Kroah-Hartman
efec475e
bc9a0c68
-57
-53
drivers/usb/gadget/config.c
-53
drivers/usb/gadget/config.c
···
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EXPORT_SYMBOL_GPL(usb_descriptor_fillbuf);
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/**
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* usb_gadget_config_buf - builts a complete configuration descriptor
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* @config: Header for the descriptor, including characteristics such
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* as power requirements and number of interfaces.
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* @buf: Buffer for the resulting configuration descriptor.
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* @length: Length of buffer. If this is not big enough to hold the
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* entire configuration descriptor, an error code will be returned.
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* @desc: Null-terminated vector of pointers to the descriptors (interface,
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* endpoint, etc) defining all functions in this device configuration.
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*
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* This copies descriptors into the response buffer, building a descriptor
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* for that configuration. It returns the buffer length or a negative
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* status code. The config.wTotalLength field is set to match the length
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* of the result, but other descriptor fields (including power usage and
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* interface count) must be set by the caller.
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*
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* Gadget drivers could use this when constructing a config descriptor
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* in response to USB_REQ_GET_DESCRIPTOR. They will need to patch the
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* resulting bDescriptorType value if USB_DT_OTHER_SPEED_CONFIG is needed.
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*/
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int usb_gadget_config_buf(
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const struct usb_config_descriptor *config,
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void *buf,
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unsigned length,
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const struct usb_descriptor_header **desc
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)
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{
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struct usb_config_descriptor *cp = buf;
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int len;
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/* config descriptor first */
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if (length < USB_DT_CONFIG_SIZE || !desc)
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return -EINVAL;
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*cp = *config;
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/* then interface/endpoint/class/vendor/... */
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len = usb_descriptor_fillbuf(USB_DT_CONFIG_SIZE + (u8 *)buf,
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length - USB_DT_CONFIG_SIZE, desc);
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if (len < 0)
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return len;
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len += USB_DT_CONFIG_SIZE;
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if (len > 0xffff)
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return -EINVAL;
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/* patch up the config descriptor */
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cp->bLength = USB_DT_CONFIG_SIZE;
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cp->bDescriptorType = USB_DT_CONFIG;
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cp->wTotalLength = cpu_to_le16(len);
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cp->bmAttributes |= USB_CONFIG_ATT_ONE;
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return len;
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}
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EXPORT_SYMBOL_GPL(usb_gadget_config_buf);
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/**
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* usb_copy_descriptors - copy a vector of USB descriptors
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* @src: null-terminated vector to copy
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* Context: initialization code, which may sleep
-4
include/linux/usb/gadget.h
-4
include/linux/usb/gadget.h
···
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int usb_descriptor_fillbuf(void *, unsigned,
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const struct usb_descriptor_header **);
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/* build config descriptor from single descriptor vector */
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int usb_gadget_config_buf(const struct usb_config_descriptor *config,
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void *buf, unsigned buflen, const struct usb_descriptor_header **desc);
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/* copy a NULL-terminated vector of descriptors */
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struct usb_descriptor_header **usb_copy_descriptors(
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struct usb_descriptor_header **);