[android-common:android13-5.10-2026-10 1/1] drivers/usb/gadget/function/f_accessory.c:1088:5: warning: no previous prototype for 'acc_ctrlrequest_composite'

[kernel test robot <lkp@intel.com>]

tree:   https://android.googlesource.com/kernel/common android13-5.10-2026-10
head:   a4c2f82969bc5fa7fcc21ede4b690ece7ff72335
commit: 30e6baaaac88f18b10ba5b7474ac35f5efdf4ef8 [1/1] ANDROID: usb: f_accessory: Check buffer size when initialised via composite
config: arm64-randconfig-r2303-20261018 (https://download.01.org/0day-ci/archive/20261019/202610191628.GaawZRNO-lkp@intel.com/config)
compiler: aarch64-linux-gcc (GCC) 11.5.0
sparse: v0.6.5-rc1
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20261019/202610191628.GaawZRNO-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202610191628.GaawZRNO-lkp@intel.com/

All warnings (new ones prefixed by >>):

   drivers/usb/gadget/function/f_accessory.c:975:5: warning: no previous prototype for 'acc_ctrlrequest' [-Wmissing-prototypes]
     975 | int acc_ctrlrequest(struct usb_composite_dev *cdev,
         |     ^~~~~~~~~~~~~~~
>> drivers/usb/gadget/function/f_accessory.c:1088:5: warning: no previous prototype for 'acc_ctrlrequest_composite' [-Wmissing-prototypes]
    1088 | int acc_ctrlrequest_composite(struct usb_composite_dev *cdev,
         |     ^~~~~~~~~~~~~~~~~~~~~~~~~
   drivers/usb/gadget/function/f_accessory.c:1441:6: warning: no previous prototype for 'acc_disconnect' [-Wmissing-prototypes]
    1441 | void acc_disconnect(void)
         |      ^~~~~~~~~~~~~~
   drivers/usb/gadget/function/f_accessory.c:1546:5: warning: no previous prototype for 'acc_ctrlrequest_configfs' [-Wmissing-prototypes]
    1546 | int acc_ctrlrequest_configfs(struct usb_function *f,
         |     ^~~~~~~~~~~~~~~~~~~~~~~~

Kconfig warnings: (for reference only)
   WARNING: unmet direct dependencies detected for DRM_MIPI_DSI
   Depends on [n]: HAS_IOMEM [=y] && DRM [=n]
   Selected by [y]:
   - GKI_HIDDEN_DRM_CONFIGS [=y]
   WARNING: unmet direct dependencies detected for DRM_KMS_CMA_HELPER
   Depends on [n]: HAS_IOMEM [=y] && DRM [=n]
   Selected by [y]:
   - GKI_HIDDEN_DRM_CONFIGS [=y]
   WARNING: unmet direct dependencies detected for DRM_GEM_CMA_HELPER
   Depends on [n]: HAS_IOMEM [=y] && DRM [=n]
   Selected by [y]:
   - GKI_HIDDEN_DRM_CONFIGS [=y]
   WARNING: unmet direct dependencies detected for BALLOON_COMPACTION
   Depends on [n]: COMPACTION [=n] && MEMORY_BALLOON [=y]
   Selected by [y]:
   - GKI_HIDDEN_MM_CONFIGS [=y]


vim +/acc_ctrlrequest_composite +1088 drivers/usb/gadget/function/f_accessory.c

  1087	
> 1088	int acc_ctrlrequest_composite(struct usb_composite_dev *cdev,
  1089				      const struct usb_ctrlrequest *ctrl)
  1090	{
  1091		u16 w_length = le16_to_cpu(ctrl->wLength);
  1092	
  1093		if (w_length > USB_COMP_EP0_BUFSIZ) {
  1094			if (ctrl->bRequestType & USB_DIR_IN) {
  1095				/* Cast away the const, we are going to overwrite on purpose. */
  1096				__le16 *temp = (__le16 *)&ctrl->wLength;
  1097	
  1098				*temp = cpu_to_le16(USB_COMP_EP0_BUFSIZ);
  1099				w_length = USB_COMP_EP0_BUFSIZ;
  1100			} else {
  1101				return -EINVAL;
  1102			}
  1103		}
  1104		return acc_ctrlrequest(cdev, ctrl);
  1105	}
  1106	EXPORT_SYMBOL_GPL(acc_ctrlrequest_composite);
  1107	

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