drivers/virt/vboxguest/vboxguest_linux.c:166: warning: Function parameter or member 'input' not described in 'vbg_input_open'

From: kernel test robot
Date: Mon Jan 01 2024 - 00:16:26 EST

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tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: 610a9b8f49fbcf1100716370d3b5f6f884a2835a
commit: 0ba002bc4393dcfae031fc707b11c094b46a5048 virt: Add vboxguest driver for Virtual Box Guest integration
date: 6 years ago
config: i386-debian-10.3 (https://download.01.org/0day-ci/archive/20240101/202401011343.2ZXFAiyt-lkp@xxxxxxxxx/config)
compiler: gcc-12 (Debian 12.2.0-14) 12.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240101/202401011343.2ZXFAiyt-lkp@xxxxxxxxx/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@xxxxxxxxx>
| Closes: https://lore.kernel.org/oe-kbuild-all/202401011343.2ZXFAiyt-lkp@xxxxxxxxx/

All warnings (new ones prefixed by >>):

drivers/virt/vboxguest/vboxguest_linux.c: In function 'vbg_pci_probe':
drivers/virt/vboxguest/vboxguest_linux.c:295:25: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast]
295 | (void *)mmio, (int)mmio_len);
| ^
drivers/virt/vboxguest/vboxguest_linux.c:367:18: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast]
367 | (void *)mmio, (int)mmio_len);
| ^
In file included from drivers/virt/vboxguest/vboxguest_linux.c:11:
drivers/virt/vboxguest/vboxguest_linux.c: At top level:
include/linux/module.h:137:14: warning: 'cleanup_module' specifies less restrictive attribute than its target 'vbg_pci_driver_exit': 'cold' [-Wmissing-attributes]
137 | void cleanup_module(void) __attribute__((alias(#exitfn)));
| ^~~~~~~~~~~~~~
include/linux/device.h:1518:1: note: in expansion of macro 'module_exit'
1518 | module_exit(__driver##_exit);
| ^~~~~~~~~~~
include/linux/pci.h:1275:9: note: in expansion of macro 'module_driver'
1275 | module_driver(__pci_driver, pci_register_driver, \
| ^~~~~~~~~~~~~
drivers/virt/vboxguest/vboxguest_linux.c:462:1: note: in expansion of macro 'module_pci_driver'
462 | module_pci_driver(vbg_pci_driver);
| ^~~~~~~~~~~~~~~~~
In file included from include/linux/input.h:22,
from drivers/virt/vboxguest/vboxguest_linux.c:8:
drivers/virt/vboxguest/vboxguest_linux.c:462:19: note: 'cleanup_module' target declared here
462 | module_pci_driver(vbg_pci_driver);
| ^~~~~~~~~~~~~~
include/linux/device.h:1514:20: note: in definition of macro 'module_driver'
1514 | static void __exit __driver##_exit(void) \
| ^~~~~~~~
drivers/virt/vboxguest/vboxguest_linux.c:462:1: note: in expansion of macro 'module_pci_driver'
462 | module_pci_driver(vbg_pci_driver);
| ^~~~~~~~~~~~~~~~~
include/linux/module.h:131:13: warning: 'init_module' specifies less restrictive attribute than its target 'vbg_pci_driver_init': 'cold' [-Wmissing-attributes]
131 | int init_module(void) __attribute__((alias(#initfn)));
| ^~~~~~~~~~~
include/linux/device.h:1513:1: note: in expansion of macro 'module_init'
1513 | module_init(__driver##_init); \
| ^~~~~~~~~~~
include/linux/pci.h:1275:9: note: in expansion of macro 'module_driver'
1275 | module_driver(__pci_driver, pci_register_driver, \
| ^~~~~~~~~~~~~
drivers/virt/vboxguest/vboxguest_linux.c:462:1: note: in expansion of macro 'module_pci_driver'
462 | module_pci_driver(vbg_pci_driver);
| ^~~~~~~~~~~~~~~~~
drivers/virt/vboxguest/vboxguest_linux.c:462:19: note: 'init_module' target declared here
462 | module_pci_driver(vbg_pci_driver);
| ^~~~~~~~~~~~~~
include/linux/device.h:1509:19: note: in definition of macro 'module_driver'
1509 | static int __init __driver##_init(void) \
| ^~~~~~~~
drivers/virt/vboxguest/vboxguest_linux.c:462:1: note: in expansion of macro 'module_pci_driver'
462 | module_pci_driver(vbg_pci_driver);
| ^~~~~~~~~~~~~~~~~
>> drivers/virt/vboxguest/vboxguest_linux.c:166: warning: Function parameter or member 'input' not described in 'vbg_input_open'
>> drivers/virt/vboxguest/vboxguest_linux.c:184: warning: Function parameter or member 'input' not described in 'vbg_input_close'
>> drivers/virt/vboxguest/vboxguest_linux.c:196: warning: Function parameter or member 'gdev' not described in 'vbg_create_input_device'
>> drivers/virt/vboxguest/vboxguest_linux.c:248: warning: Function parameter or member 'pci' not described in 'vbg_pci_probe'
>> drivers/virt/vboxguest/vboxguest_linux.c:248: warning: Function parameter or member 'id' not described in 'vbg_pci_probe'
--
>> drivers/virt/vboxguest/vboxguest_core.c:341: warning: Function parameter or member 'work' not described in 'vbg_balloon_work'
>> drivers/virt/vboxguest/vboxguest_core.c:405: warning: Function parameter or member 't' not described in 'vbg_heartbeat_timer'
--
>> drivers/virt/vboxguest/vboxguest_utils.c:418: warning: Function parameter or member 'gdev' not described in 'hgcm_cancel_call'
>> drivers/virt/vboxguest/vboxguest_utils.c:418: warning: Function parameter or member 'call' not described in 'hgcm_cancel_call'

vim +166 drivers/virt/vboxguest/vboxguest_linux.c

159
160 /**
161 * Called when the input device is first opened.
162 *
163 * Sets up absolute mouse reporting.
164 */
165 static int vbg_input_open(struct input_dev *input)
> 166 {
167 struct vbg_dev *gdev = input_get_drvdata(input);
168 u32 feat = VMMDEV_MOUSE_GUEST_CAN_ABSOLUTE | VMMDEV_MOUSE_NEW_PROTOCOL;
169 int ret;
170
171 ret = vbg_core_set_mouse_status(gdev, feat);
172 if (ret)
173 return ret;
174
175 return 0;
176 }
177
178 /**
179 * Called if all open handles to the input device are closed.
180 *
181 * Disables absolute reporting.
182 */
183 static void vbg_input_close(struct input_dev *input)
> 184 {
185 struct vbg_dev *gdev = input_get_drvdata(input);
186
187 vbg_core_set_mouse_status(gdev, 0);
188 }
189
190 /**
191 * Creates the kernel input device.
192 *
193 * Return: 0 on success, negated errno on failure.
194 */
195 static int vbg_create_input_device(struct vbg_dev *gdev)
> 196 {
197 struct input_dev *input;
198
199 input = devm_input_allocate_device(gdev->dev);
200 if (!input)
201 return -ENOMEM;
202
203 input->id.bustype = BUS_PCI;
204 input->id.vendor = VBOX_VENDORID;
205 input->id.product = VMMDEV_DEVICEID;
206 input->open = vbg_input_open;
207 input->close = vbg_input_close;
208 input->dev.parent = gdev->dev;
209 input->name = "VirtualBox mouse integration";
210
211 input_set_abs_params(input, ABS_X, VMMDEV_MOUSE_RANGE_MIN,
212 VMMDEV_MOUSE_RANGE_MAX, 0, 0);
213 input_set_abs_params(input, ABS_Y, VMMDEV_MOUSE_RANGE_MIN,
214 VMMDEV_MOUSE_RANGE_MAX, 0, 0);
215 input_set_capability(input, EV_KEY, BTN_MOUSE);
216 input_set_drvdata(input, gdev);
217
218 gdev->input = input;
219
220 return input_register_device(gdev->input);
221 }
222
223 static ssize_t host_version_show(struct device *dev,
224 struct device_attribute *attr, char *buf)
225 {
226 struct vbg_dev *gdev = dev_get_drvdata(dev);
227
228 return sprintf(buf, "%s\n", gdev->host_version);
229 }
230
231 static ssize_t host_features_show(struct device *dev,
232 struct device_attribute *attr, char *buf)
233 {
234 struct vbg_dev *gdev = dev_get_drvdata(dev);
235
236 return sprintf(buf, "%#x\n", gdev->host_features);
237 }
238
239 static DEVICE_ATTR_RO(host_version);
240 static DEVICE_ATTR_RO(host_features);
241
242 /**
243 * Does the PCI detection and init of the device.
244 *
245 * Return: 0 on success, negated errno on failure.
246 */
247 static int vbg_pci_probe(struct pci_dev *pci, const struct pci_device_id *id)
> 248 {
249 struct device *dev = &pci->dev;
250 resource_size_t io, io_len, mmio, mmio_len;
251 struct vmmdev_memory *vmmdev;
252 struct vbg_dev *gdev;
253 int ret;
254
255 gdev = devm_kzalloc(dev, sizeof(*gdev), GFP_KERNEL);
256 if (!gdev)
257 return -ENOMEM;
258
259 ret = pci_enable_device(pci);
260 if (ret != 0) {
261 vbg_err("vboxguest: Error enabling device: %d\n", ret);
262 return ret;
263 }
264
265 ret = -ENODEV;
266
267 io = pci_resource_start(pci, 0);
268 io_len = pci_resource_len(pci, 0);
269 if (!io || !io_len) {
270 vbg_err("vboxguest: Error IO-port resource (0) is missing\n");
271 goto err_disable_pcidev;
272 }
273 if (devm_request_region(dev, io, io_len, DEVICE_NAME) == NULL) {
274 vbg_err("vboxguest: Error could not claim IO resource\n");
275 ret = -EBUSY;
276 goto err_disable_pcidev;
277 }
278
279 mmio = pci_resource_start(pci, 1);
280 mmio_len = pci_resource_len(pci, 1);
281 if (!mmio || !mmio_len) {
282 vbg_err("vboxguest: Error MMIO resource (1) is missing\n");
283 goto err_disable_pcidev;
284 }
285
286 if (devm_request_mem_region(dev, mmio, mmio_len, DEVICE_NAME) == NULL) {
287 vbg_err("vboxguest: Error could not claim MMIO resource\n");
288 ret = -EBUSY;
289 goto err_disable_pcidev;
290 }
291
292 vmmdev = devm_ioremap(dev, mmio, mmio_len);
293 if (!vmmdev) {
294 vbg_err("vboxguest: Error ioremap failed; MMIO addr=%p size=%d\n",
295 (void *)mmio, (int)mmio_len);
296 goto err_disable_pcidev;
297 }
298
299 /* Validate MMIO region version and size. */
300 if (vmmdev->version != VMMDEV_MEMORY_VERSION ||
301 vmmdev->size < 32 || vmmdev->size > mmio_len) {
302 vbg_err("vboxguest: Bogus VMMDev memory; version=%08x (expected %08x) size=%d (expected <= %d)\n",
303 vmmdev->version, VMMDEV_MEMORY_VERSION,
304 vmmdev->size, (int)mmio_len);
305 goto err_disable_pcidev;
306 }
307
308 gdev->io_port = io;
309 gdev->mmio = vmmdev;
310 gdev->dev = dev;
311 gdev->misc_device.minor = MISC_DYNAMIC_MINOR;
312 gdev->misc_device.name = DEVICE_NAME;
313 gdev->misc_device.fops = &vbg_misc_device_fops;
314 gdev->misc_device_user.minor = MISC_DYNAMIC_MINOR;
315 gdev->misc_device_user.name = DEVICE_NAME_USER;
316 gdev->misc_device_user.fops = &vbg_misc_device_user_fops;
317
318 ret = vbg_core_init(gdev, VMMDEV_EVENT_MOUSE_POSITION_CHANGED);
319 if (ret)
320 goto err_disable_pcidev;
321
322 ret = vbg_create_input_device(gdev);
323 if (ret) {
324 vbg_err("vboxguest: Error creating input device: %d\n", ret);
325 goto err_vbg_core_exit;
326 }
327
328 ret = devm_request_irq(dev, pci->irq, vbg_core_isr, IRQF_SHARED,
329 DEVICE_NAME, gdev);
330 if (ret) {
331 vbg_err("vboxguest: Error requesting irq: %d\n", ret);
332 goto err_vbg_core_exit;
333 }
334
335 ret = misc_register(&gdev->misc_device);
336 if (ret) {
337 vbg_err("vboxguest: Error misc_register %s failed: %d\n",
338 DEVICE_NAME, ret);
339 goto err_vbg_core_exit;
340 }
341
342 ret = misc_register(&gdev->misc_device_user);
343 if (ret) {
344 vbg_err("vboxguest: Error misc_register %s failed: %d\n",
345 DEVICE_NAME_USER, ret);
346 goto err_unregister_misc_device;
347 }
348
349 mutex_lock(&vbg_gdev_mutex);
350 if (!vbg_gdev)
351 vbg_gdev = gdev;
352 else
353 ret = -EBUSY;
354 mutex_unlock(&vbg_gdev_mutex);
355
356 if (ret) {
357 vbg_err("vboxguest: Error more then 1 vbox guest pci device\n");
358 goto err_unregister_misc_device_user;
359 }
360
361 pci_set_drvdata(pci, gdev);
362 device_create_file(dev, &dev_attr_host_version);
363 device_create_file(dev, &dev_attr_host_features);
364
365 vbg_info("vboxguest: misc device minor %d, IRQ %d, I/O port %x, MMIO at %p (size %d)\n",
366 gdev->misc_device.minor, pci->irq, gdev->io_port,
367 (void *)mmio, (int)mmio_len);
368
369 return 0;
370
371 err_unregister_misc_device_user:
372 misc_deregister(&gdev->misc_device_user);
373 err_unregister_misc_device:
374 misc_deregister(&gdev->misc_device);
375 err_vbg_core_exit:
376 vbg_core_exit(gdev);
377 err_disable_pcidev:
378 pci_disable_device(pci);
379
380 return ret;
381 }
382

--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki

Next message: kernel test robot: "Re: [PATCH 5/8] dt-bindings: nt35510: add compatible for FRIDA FRD400B25025-A-CTK"
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