LinuxLists.cc - [PATCH] udmabuf: put dmabuf in case of get fd failed

2021-12-20 05:43:41

Subject: [PATCH] udmabuf: put dmabuf in case of get fd failed

It needs call dma_buf_put() to put dmabuf in case of getting
fd failed.

Signed-off-by: Xianting Tian <[email protected]>
---
drivers/dma-buf/udmabuf.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/dma-buf/udmabuf.c b/drivers/dma-buf/udmabuf.c
index c57a609db..d77f96995 100644
--- a/drivers/dma-buf/udmabuf.c
+++ b/drivers/dma-buf/udmabuf.c
@@ -274,8 +274,11 @@ static long udmabuf_create(struct miscdevice *device,
flags = 0;
if (head->flags & UDMABUF_FLAGS_CLOEXEC)
flags |= O_CLOEXEC;
- return dma_buf_fd(buf, flags);
+ ret = dma_buf_fd(buf, flags);
+ if (ret < 0) {
+ dma_buf_put(buf);

+ return ret;
err:
while (pgbuf > 0)
put_page(ubuf->pages[--pgbuf]);
--
2.17.1

2021-12-20 13:21:13

by kernel test robot

[permalink] [raw]

Subject: Re: [PATCH] udmabuf: put dmabuf in case of get fd failed

Hi Xianting,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on linus/master]
[also build test WARNING on v5.16-rc6 next-20211217]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch]

url: https://github.com/0day-ci/linux/commits/Xianting-Tian/udmabuf-put-dmabuf-in-case-of-get-fd-failed/20211220-134433
base: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git a7904a538933c525096ca2ccde1e60d0ee62c08e
config: x86_64-randconfig-r032-20211220 (https://download.01.org/0day-ci/archive/20211220/[email protected]/config)
compiler: gcc-9 (Debian 9.3.0-22) 9.3.0
reproduce (this is a W=1 build):
# https://github.com/0day-ci/linux/commit/322781a4da9de4a3057afd933108d23ca7f5282e
git remote add linux-review https://github.com/0day-ci/linux
git fetch --no-tags linux-review Xianting-Tian/udmabuf-put-dmabuf-in-case-of-get-fd-failed/20211220-134433
git checkout 322781a4da9de4a3057afd933108d23ca7f5282e
# save the config file to linux build tree
mkdir build_dir
make W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash drivers/dma-buf/

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <[email protected]>

All warnings (new ones prefixed by >>):

drivers/dma-buf/udmabuf.c: In function 'udmabuf_create':
drivers/dma-buf/udmabuf.c:292:13: error: invalid storage class for function 'udmabuf_ioctl_create'
292 | static long udmabuf_ioctl_create(struct file *filp, unsigned long arg)
| ^~~~~~~~~~~~~~~~~~~~
>> drivers/dma-buf/udmabuf.c:292:1: warning: ISO C90 forbids mixed declarations and code [-Wdeclaration-after-statement]
292 | static long udmabuf_ioctl_create(struct file *filp, unsigned long arg)
| ^~~~~~
drivers/dma-buf/udmabuf.c:311:13: error: invalid storage class for function 'udmabuf_ioctl_create_list'
311 | static long udmabuf_ioctl_create_list(struct file *filp, unsigned long arg)
| ^~~~~~~~~~~~~~~~~~~~~~~~~
drivers/dma-buf/udmabuf.c:332:13: error: invalid storage class for function 'udmabuf_ioctl'
332 | static long udmabuf_ioctl(struct file *filp, unsigned int ioctl,
| ^~~~~~~~~~~~~
drivers/dma-buf/udmabuf.c:353:20: error: initializer element is not constant
353 | .unlocked_ioctl = udmabuf_ioctl,
| ^~~~~~~~~~~~~
drivers/dma-buf/udmabuf.c:353:20: note: (near initialization for 'udmabuf_fops.unlocked_ioctl')
drivers/dma-buf/udmabuf.c:355:20: error: initializer element is not constant
355 | .compat_ioctl = udmabuf_ioctl,
| ^~~~~~~~~~~~~
drivers/dma-buf/udmabuf.c:355:20: note: (near initialization for 'udmabuf_fops.compat_ioctl')
drivers/dma-buf/udmabuf.c:365:19: error: invalid storage class for function 'udmabuf_dev_init'
365 | static int __init udmabuf_dev_init(void)
| ^~~~~~~~~~~~~~~~
drivers/dma-buf/udmabuf.c:370:20: error: invalid storage class for function 'udmabuf_dev_exit'
370 | static void __exit udmabuf_dev_exit(void)
| ^~~~~~~~~~~~~~~~
In file included from include/linux/init.h:5,
from include/linux/cred.h:12,
from drivers/dma-buf/udmabuf.c:2:
include/linux/compiler.h:244:46: error: initializer element is not constant
244 | __UNIQUE_ID(__PASTE(__addressable_,sym)) = (void *)&sym;
| ^
include/linux/init.h:236:2: note: in expansion of macro '__ADDRESSABLE'
236 | __ADDRESSABLE(fn)
| ^~~~~~~~~~~~~
include/linux/init.h:241:2: note: in expansion of macro '__define_initcall_stub'
241 | __define_initcall_stub(__stub, fn) \
| ^~~~~~~~~~~~~~~~~~~~~~
include/linux/init.h:254:2: note: in expansion of macro '____define_initcall'
254 | ____define_initcall(fn, \
| ^~~~~~~~~~~~~~~~~~~
include/linux/init.h:260:2: note: in expansion of macro '__unique_initcall'
260 | __unique_initcall(fn, id, __sec, __initcall_id(fn))
| ^~~~~~~~~~~~~~~~~
include/linux/init.h:262:35: note: in expansion of macro '___define_initcall'
262 | #define __define_initcall(fn, id) ___define_initcall(fn, id, .initcall##id)
| ^~~~~~~~~~~~~~~~~~
include/linux/init.h:291:30: note: in expansion of macro '__define_initcall'
291 | #define device_initcall(fn) __define_initcall(fn, 6)
| ^~~~~~~~~~~~~~~~~
include/linux/init.h:296:24: note: in expansion of macro 'device_initcall'
296 | #define __initcall(fn) device_initcall(fn)
| ^~~~~~~~~~~~~~~
include/linux/module.h:88:24: note: in expansion of macro '__initcall'
88 | #define module_init(x) __initcall(x);
| ^~~~~~~~~~
drivers/dma-buf/udmabuf.c:375:1: note: in expansion of macro 'module_init'
375 | module_init(udmabuf_dev_init)
| ^~~~~~~~~~~
In file included from include/linux/container_of.h:5,
from include/linux/list.h:5,
from include/linux/key.h:14,
from include/linux/cred.h:13,
from drivers/dma-buf/udmabuf.c:2:
>> include/linux/build_bug.h:78:41: warning: ISO C90 forbids mixed declarations and code [-Wdeclaration-after-statement]
78 | #define __static_assert(expr, msg, ...) _Static_assert(expr, msg)
| ^~~~~~~~~~~~~~
include/linux/build_bug.h:77:34: note: in expansion of macro '__static_assert'
77 | #define static_assert(expr, ...) __static_assert(expr, ##__VA_ARGS__, #expr)
| ^~~~~~~~~~~~~~~
include/linux/init.h:246:2: note: in expansion of macro 'static_assert'
246 | static_assert(__same_type(initcall_t, &fn));
| ^~~~~~~~~~~~~
include/linux/init.h:254:2: note: in expansion of macro '____define_initcall'
254 | ____define_initcall(fn, \
| ^~~~~~~~~~~~~~~~~~~
include/linux/init.h:260:2: note: in expansion of macro '__unique_initcall'
260 | __unique_initcall(fn, id, __sec, __initcall_id(fn))
| ^~~~~~~~~~~~~~~~~
include/linux/init.h:262:35: note: in expansion of macro '___define_initcall'
262 | #define __define_initcall(fn, id) ___define_initcall(fn, id, .initcall##id)
| ^~~~~~~~~~~~~~~~~~
include/linux/init.h:291:30: note: in expansion of macro '__define_initcall'
291 | #define device_initcall(fn) __define_initcall(fn, 6)
| ^~~~~~~~~~~~~~~~~
include/linux/init.h:296:24: note: in expansion of macro 'device_initcall'
296 | #define __initcall(fn) device_initcall(fn)
| ^~~~~~~~~~~~~~~
include/linux/module.h:88:24: note: in expansion of macro '__initcall'
88 | #define module_init(x) __initcall(x);
| ^~~~~~~~~~
drivers/dma-buf/udmabuf.c:375:1: note: in expansion of macro 'module_init'
375 | module_init(udmabuf_dev_init)
| ^~~~~~~~~~~
In file included from include/linux/cred.h:12,
from drivers/dma-buf/udmabuf.c:2:
drivers/dma-buf/udmabuf.c:376:13: error: initializer element is not constant
376 | module_exit(udmabuf_dev_exit)
| ^~~~~~~~~~~~~~~~
include/linux/init.h:299:50: note: in definition of macro '__exitcall'
299 | static exitcall_t __exitcall_##fn __exit_call = fn
| ^~
drivers/dma-buf/udmabuf.c:376:1: note: in expansion of macro 'module_exit'
376 | module_exit(udmabuf_dev_exit)
| ^~~~~~~~~~~
include/linux/init.h:299:2: warning: ISO C90 forbids mixed declarations and code [-Wdeclaration-after-statement]
299 | static exitcall_t __exitcall_##fn __exit_call = fn
| ^~~~~~
include/linux/module.h:100:24: note: in expansion of macro '__exitcall'
100 | #define module_exit(x) __exitcall(x);
| ^~~~~~~~~~
drivers/dma-buf/udmabuf.c:376:1: note: in expansion of macro 'module_exit'
376 | module_exit(udmabuf_dev_exit)
| ^~~~~~~~~~~
drivers/dma-buf/udmabuf.c:379:1: error: expected declaration or statement at end of input
379 | MODULE_LICENSE("GPL v2");
| ^~~~~~~~~~~~~~

vim +292 drivers/dma-buf/udmabuf.c

fbb0de79507819 Gerd Hoffmann 2018-08-27 291
fbb0de79507819 Gerd Hoffmann 2018-08-27 @292 static long udmabuf_ioctl_create(struct file *filp, unsigned long arg)
fbb0de79507819 Gerd Hoffmann 2018-08-27 293 {
fbb0de79507819 Gerd Hoffmann 2018-08-27 294 struct udmabuf_create create;
fbb0de79507819 Gerd Hoffmann 2018-08-27 295 struct udmabuf_create_list head;
fbb0de79507819 Gerd Hoffmann 2018-08-27 296 struct udmabuf_create_item list;
fbb0de79507819 Gerd Hoffmann 2018-08-27 297
fbb0de79507819 Gerd Hoffmann 2018-08-27 298 if (copy_from_user(&create, (void __user *)arg,
33f35429fc49c0 Gerd Hoffmann 2018-09-11 299 sizeof(create)))
fbb0de79507819 Gerd Hoffmann 2018-08-27 300 return -EFAULT;
fbb0de79507819 Gerd Hoffmann 2018-08-27 301
fbb0de79507819 Gerd Hoffmann 2018-08-27 302 head.flags = create.flags;
fbb0de79507819 Gerd Hoffmann 2018-08-27 303 head.count = 1;
fbb0de79507819 Gerd Hoffmann 2018-08-27 304 list.memfd = create.memfd;
fbb0de79507819 Gerd Hoffmann 2018-08-27 305 list.offset = create.offset;
fbb0de79507819 Gerd Hoffmann 2018-08-27 306 list.size = create.size;
fbb0de79507819 Gerd Hoffmann 2018-08-27 307
c1bbed66899726 Gurchetan Singh 2019-12-02 308 return udmabuf_create(filp->private_data, &head, &list);
fbb0de79507819 Gerd Hoffmann 2018-08-27 309 }
fbb0de79507819 Gerd Hoffmann 2018-08-27 310

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/[email protected]

2021-12-20 13:42:13

by kernel test robot

[permalink] [raw]

Subject: Re: [PATCH] udmabuf: put dmabuf in case of get fd failed

2021-12-20 14:12:30

by kernel test robot

[permalink] [raw]

Subject: Re: [PATCH] udmabuf: put dmabuf in case of get fd failed

Hi Xianting,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on linus/master]
[also build test ERROR on v5.16-rc6 next-20211217]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch]

url: https://github.com/0day-ci/linux/commits/Xianting-Tian/udmabuf-put-dmabuf-in-case-of-get-fd-failed/20211220-134433
base: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git a7904a538933c525096ca2ccde1e60d0ee62c08e
config: arc-randconfig-r043-20211220 (https://download.01.org/0day-ci/archive/20211220/[email protected]/config)
compiler: arceb-elf-gcc (GCC) 11.2.0
reproduce (this is a W=1 build):
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# https://github.com/0day-ci/linux/commit/322781a4da9de4a3057afd933108d23ca7f5282e
git remote add linux-review https://github.com/0day-ci/linux
git fetch --no-tags linux-review Xianting-Tian/udmabuf-put-dmabuf-in-case-of-get-fd-failed/20211220-134433
git checkout 322781a4da9de4a3057afd933108d23ca7f5282e
# save the config file to linux build tree
mkdir build_dir
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross O=build_dir ARCH=arc SHELL=/bin/bash drivers/dma-buf/

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <[email protected]>

All error/warnings (new ones prefixed by >>):

drivers/dma-buf/udmabuf.c: In function 'udmabuf_create':
>> drivers/dma-buf/udmabuf.c:292:13: error: invalid storage class for function 'udmabuf_ioctl_create'
292 | static long udmabuf_ioctl_create(struct file *filp, unsigned long arg)
| ^~~~~~~~~~~~~~~~~~~~
>> drivers/dma-buf/udmabuf.c:292:1: warning: ISO C90 forbids mixed declarations and code [-Wdeclaration-after-statement]
292 | static long udmabuf_ioctl_create(struct file *filp, unsigned long arg)
| ^~~~~~
>> drivers/dma-buf/udmabuf.c:311:13: error: invalid storage class for function 'udmabuf_ioctl_create_list'
311 | static long udmabuf_ioctl_create_list(struct file *filp, unsigned long arg)
| ^~~~~~~~~~~~~~~~~~~~~~~~~
>> drivers/dma-buf/udmabuf.c:332:13: error: invalid storage class for function 'udmabuf_ioctl'
332 | static long udmabuf_ioctl(struct file *filp, unsigned int ioctl,
| ^~~~~~~~~~~~~
>> drivers/dma-buf/udmabuf.c:353:27: error: initializer element is not constant
353 | .unlocked_ioctl = udmabuf_ioctl,
| ^~~~~~~~~~~~~
drivers/dma-buf/udmabuf.c:353:27: note: (near initialization for 'udmabuf_fops.unlocked_ioctl')
>> drivers/dma-buf/udmabuf.c:365:19: error: invalid storage class for function 'udmabuf_dev_init'
365 | static int __init udmabuf_dev_init(void)
| ^~~~~~~~~~~~~~~~
>> drivers/dma-buf/udmabuf.c:370:20: error: invalid storage class for function 'udmabuf_dev_exit'
370 | static void __exit udmabuf_dev_exit(void)
| ^~~~~~~~~~~~~~~~
In file included from include/linux/cred.h:12,
from drivers/dma-buf/udmabuf.c:2:
drivers/dma-buf/udmabuf.c:375:13: error: initializer element is not constant
375 | module_init(udmabuf_dev_init)
| ^~~~~~~~~~~~~~~~
include/linux/init.h:250:55: note: in definition of macro '____define_initcall'
250 | __attribute__((__section__(__sec))) = fn;
| ^~
include/linux/init.h:260:9: note: in expansion of macro '__unique_initcall'
260 | __unique_initcall(fn, id, __sec, __initcall_id(fn))
| ^~~~~~~~~~~~~~~~~
include/linux/init.h:262:35: note: in expansion of macro '___define_initcall'
262 | #define __define_initcall(fn, id) ___define_initcall(fn, id, .initcall##id)
| ^~~~~~~~~~~~~~~~~~
include/linux/init.h:291:41: note: in expansion of macro '__define_initcall'
291 | #define device_initcall(fn) __define_initcall(fn, 6)
| ^~~~~~~~~~~~~~~~~
include/linux/init.h:296:24: note: in expansion of macro 'device_initcall'
296 | #define __initcall(fn) device_initcall(fn)
| ^~~~~~~~~~~~~~~
include/linux/module.h:88:25: note: in expansion of macro '__initcall'
88 | #define module_init(x) __initcall(x);
| ^~~~~~~~~~
drivers/dma-buf/udmabuf.c:375:1: note: in expansion of macro 'module_init'
375 | module_init(udmabuf_dev_init)
| ^~~~~~~~~~~
drivers/dma-buf/udmabuf.c:376:13: error: initializer element is not constant
376 | module_exit(udmabuf_dev_exit)
| ^~~~~~~~~~~~~~~~
include/linux/init.h:299:57: note: in definition of macro '__exitcall'
299 | static exitcall_t __exitcall_##fn __exit_call = fn
| ^~
drivers/dma-buf/udmabuf.c:376:1: note: in expansion of macro 'module_exit'
376 | module_exit(udmabuf_dev_exit)
| ^~~~~~~~~~~
>> include/linux/init.h:299:9: warning: ISO C90 forbids mixed declarations and code [-Wdeclaration-after-statement]
299 | static exitcall_t __exitcall_##fn __exit_call = fn
| ^~~~~~
include/linux/module.h:100:25: note: in expansion of macro '__exitcall'
100 | #define module_exit(x) __exitcall(x);
| ^~~~~~~~~~
drivers/dma-buf/udmabuf.c:376:1: note: in expansion of macro 'module_exit'
376 | module_exit(udmabuf_dev_exit)
| ^~~~~~~~~~~
>> drivers/dma-buf/udmabuf.c:379:1: error: expected declaration or statement at end of input
379 | MODULE_LICENSE("GPL v2");
| ^~~~~~~~~~~~~~

vim +/udmabuf_ioctl_create +292 drivers/dma-buf/udmabuf.c

fbb0de795078190 Gerd Hoffmann 2018-08-27 291
fbb0de795078190 Gerd Hoffmann 2018-08-27 @292 static long udmabuf_ioctl_create(struct file *filp, unsigned long arg)
fbb0de795078190 Gerd Hoffmann 2018-08-27 293 {
fbb0de795078190 Gerd Hoffmann 2018-08-27 294 struct udmabuf_create create;
fbb0de795078190 Gerd Hoffmann 2018-08-27 295 struct udmabuf_create_list head;
fbb0de795078190 Gerd Hoffmann 2018-08-27 296 struct udmabuf_create_item list;
fbb0de795078190 Gerd Hoffmann 2018-08-27 297
fbb0de795078190 Gerd Hoffmann 2018-08-27 298 if (copy_from_user(&create, (void __user *)arg,
33f35429fc49c09 Gerd Hoffmann 2018-09-11 299 sizeof(create)))
fbb0de795078190 Gerd Hoffmann 2018-08-27 300 return -EFAULT;
fbb0de795078190 Gerd Hoffmann 2018-08-27 301
fbb0de795078190 Gerd Hoffmann 2018-08-27 302 head.flags = create.flags;
fbb0de795078190 Gerd Hoffmann 2018-08-27 303 head.count = 1;
fbb0de795078190 Gerd Hoffmann 2018-08-27 304 list.memfd = create.memfd;
fbb0de795078190 Gerd Hoffmann 2018-08-27 305 list.offset = create.offset;
fbb0de795078190 Gerd Hoffmann 2018-08-27 306 list.size = create.size;
fbb0de795078190 Gerd Hoffmann 2018-08-27 307
c1bbed668997268 Gurchetan Singh 2019-12-02 308 return udmabuf_create(filp->private_data, &head, &list);
fbb0de795078190 Gerd Hoffmann 2018-08-27 309 }
fbb0de795078190 Gerd Hoffmann 2018-08-27 310
fbb0de795078190 Gerd Hoffmann 2018-08-27 @311 static long udmabuf_ioctl_create_list(struct file *filp, unsigned long arg)
fbb0de795078190 Gerd Hoffmann 2018-08-27 312 {
fbb0de795078190 Gerd Hoffmann 2018-08-27 313 struct udmabuf_create_list head;
fbb0de795078190 Gerd Hoffmann 2018-08-27 314 struct udmabuf_create_item *list;
fbb0de795078190 Gerd Hoffmann 2018-08-27 315 int ret = -EINVAL;
fbb0de795078190 Gerd Hoffmann 2018-08-27 316 u32 lsize;
fbb0de795078190 Gerd Hoffmann 2018-08-27 317
fbb0de795078190 Gerd Hoffmann 2018-08-27 318 if (copy_from_user(&head, (void __user *)arg, sizeof(head)))
fbb0de795078190 Gerd Hoffmann 2018-08-27 319 return -EFAULT;
dc4716d75154b36 Gerd Hoffmann 2018-09-11 320 if (head.count > list_limit)
fbb0de795078190 Gerd Hoffmann 2018-08-27 321 return -EINVAL;
fbb0de795078190 Gerd Hoffmann 2018-08-27 322 lsize = sizeof(struct udmabuf_create_item) * head.count;
fbb0de795078190 Gerd Hoffmann 2018-08-27 323 list = memdup_user((void __user *)(arg + sizeof(head)), lsize);
fbb0de795078190 Gerd Hoffmann 2018-08-27 324 if (IS_ERR(list))
fbb0de795078190 Gerd Hoffmann 2018-08-27 325 return PTR_ERR(list);
fbb0de795078190 Gerd Hoffmann 2018-08-27 326
c1bbed668997268 Gurchetan Singh 2019-12-02 327 ret = udmabuf_create(filp->private_data, &head, list);
fbb0de795078190 Gerd Hoffmann 2018-08-27 328 kfree(list);
fbb0de795078190 Gerd Hoffmann 2018-08-27 329 return ret;
fbb0de795078190 Gerd Hoffmann 2018-08-27 330 }
fbb0de795078190 Gerd Hoffmann 2018-08-27 331
fbb0de795078190 Gerd Hoffmann 2018-08-27 @332 static long udmabuf_ioctl(struct file *filp, unsigned int ioctl,
fbb0de795078190 Gerd Hoffmann 2018-08-27 333 unsigned long arg)
fbb0de795078190 Gerd Hoffmann 2018-08-27 334 {
fbb0de795078190 Gerd Hoffmann 2018-08-27 335 long ret;
fbb0de795078190 Gerd Hoffmann 2018-08-27 336
fbb0de795078190 Gerd Hoffmann 2018-08-27 337 switch (ioctl) {
fbb0de795078190 Gerd Hoffmann 2018-08-27 338 case UDMABUF_CREATE:
fbb0de795078190 Gerd Hoffmann 2018-08-27 339 ret = udmabuf_ioctl_create(filp, arg);
fbb0de795078190 Gerd Hoffmann 2018-08-27 340 break;
fbb0de795078190 Gerd Hoffmann 2018-08-27 341 case UDMABUF_CREATE_LIST:
fbb0de795078190 Gerd Hoffmann 2018-08-27 342 ret = udmabuf_ioctl_create_list(filp, arg);
fbb0de795078190 Gerd Hoffmann 2018-08-27 343 break;
fbb0de795078190 Gerd Hoffmann 2018-08-27 344 default:
52499d9cdd88784 Gerd Hoffmann 2018-09-11 345 ret = -ENOTTY;
fbb0de795078190 Gerd Hoffmann 2018-08-27 346 break;
fbb0de795078190 Gerd Hoffmann 2018-08-27 347 }
fbb0de795078190 Gerd Hoffmann 2018-08-27 348 return ret;
fbb0de795078190 Gerd Hoffmann 2018-08-27 349 }
fbb0de795078190 Gerd Hoffmann 2018-08-27 350
fbb0de795078190 Gerd Hoffmann 2018-08-27 351 static const struct file_operations udmabuf_fops = {
fbb0de795078190 Gerd Hoffmann 2018-08-27 352 .owner = THIS_MODULE,
fbb0de795078190 Gerd Hoffmann 2018-08-27 @353 .unlocked_ioctl = udmabuf_ioctl,
d4a197f4047e01d Kristian H. Kristensen 2020-09-03 354 #ifdef CONFIG_COMPAT
d4a197f4047e01d Kristian H. Kristensen 2020-09-03 355 .compat_ioctl = udmabuf_ioctl,
d4a197f4047e01d Kristian H. Kristensen 2020-09-03 356 #endif
fbb0de795078190 Gerd Hoffmann 2018-08-27 357 };
fbb0de795078190 Gerd Hoffmann 2018-08-27 358
fbb0de795078190 Gerd Hoffmann 2018-08-27 359 static struct miscdevice udmabuf_misc = {
fbb0de795078190 Gerd Hoffmann 2018-08-27 360 .minor = MISC_DYNAMIC_MINOR,
fbb0de795078190 Gerd Hoffmann 2018-08-27 361 .name = "udmabuf",
fbb0de795078190 Gerd Hoffmann 2018-08-27 362 .fops = &udmabuf_fops,
fbb0de795078190 Gerd Hoffmann 2018-08-27 363 };
fbb0de795078190 Gerd Hoffmann 2018-08-27 364
fbb0de795078190 Gerd Hoffmann 2018-08-27 @365 static int __init udmabuf_dev_init(void)
fbb0de795078190 Gerd Hoffmann 2018-08-27 366 {
fbb0de795078190 Gerd Hoffmann 2018-08-27 367 return misc_register(&udmabuf_misc);
fbb0de795078190 Gerd Hoffmann 2018-08-27 368 }
fbb0de795078190 Gerd Hoffmann 2018-08-27 369
fbb0de795078190 Gerd Hoffmann 2018-08-27 @370 static void __exit udmabuf_dev_exit(void)
fbb0de795078190 Gerd Hoffmann 2018-08-27 371 {
fbb0de795078190 Gerd Hoffmann 2018-08-27 372 misc_deregister(&udmabuf_misc);
fbb0de795078190 Gerd Hoffmann 2018-08-27 373 }
fbb0de795078190 Gerd Hoffmann 2018-08-27 374
fbb0de795078190 Gerd Hoffmann 2018-08-27 375 module_init(udmabuf_dev_init)
fbb0de795078190 Gerd Hoffmann 2018-08-27 376 module_exit(udmabuf_dev_exit)
fbb0de795078190 Gerd Hoffmann 2018-08-27 377
fbb0de795078190 Gerd Hoffmann 2018-08-27 378 MODULE_AUTHOR("Gerd Hoffmann <[email protected]>");
fbb0de795078190 Gerd Hoffmann 2018-08-27 @379 MODULE_LICENSE("GPL v2");

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0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/[email protected]