| File: | dev/usb/uhid.c |
| Warning: | line 332, column 2 Value stored to 'error' is never read |
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| 1 | /* $OpenBSD: uhid.c,v 1.88 2021/11/15 15:36:24 anton Exp $ */ |
| 2 | /* $NetBSD: uhid.c,v 1.57 2003/03/11 16:44:00 augustss Exp $ */ |
| 3 | |
| 4 | /* |
| 5 | * Copyright (c) 1998 The NetBSD Foundation, Inc. |
| 6 | * All rights reserved. |
| 7 | * |
| 8 | * This code is derived from software contributed to The NetBSD Foundation |
| 9 | * by Lennart Augustsson (lennart@augustsson.net) at |
| 10 | * Carlstedt Research & Technology. |
| 11 | * |
| 12 | * Redistribution and use in source and binary forms, with or without |
| 13 | * modification, are permitted provided that the following conditions |
| 14 | * are met: |
| 15 | * 1. Redistributions of source code must retain the above copyright |
| 16 | * notice, this list of conditions and the following disclaimer. |
| 17 | * 2. Redistributions in binary form must reproduce the above copyright |
| 18 | * notice, this list of conditions and the following disclaimer in the |
| 19 | * documentation and/or other materials provided with the distribution. |
| 20 | * |
| 21 | * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS |
| 22 | * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED |
| 23 | * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| 24 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS |
| 25 | * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| 26 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| 27 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| 28 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| 29 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| 30 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| 31 | * POSSIBILITY OF SUCH DAMAGE. |
| 32 | */ |
| 33 | |
| 34 | /* |
| 35 | * HID spec: https://www.usb.org/sites/default/files/hid1_11.pdf |
| 36 | */ |
| 37 | |
| 38 | #include "fido.h" |
| 39 | #include "ujoy.h" |
| 40 | |
| 41 | #include <sys/param.h> |
| 42 | #include <sys/systm.h> |
| 43 | #include <sys/kernel.h> |
| 44 | #include <sys/malloc.h> |
| 45 | #include <sys/signalvar.h> |
| 46 | #include <sys/device.h> |
| 47 | #include <sys/ioctl.h> |
| 48 | #include <sys/conf.h> |
| 49 | #include <sys/tty.h> |
| 50 | #include <sys/selinfo.h> |
| 51 | #include <sys/proc.h> |
| 52 | #include <sys/vnode.h> |
| 53 | #include <sys/poll.h> |
| 54 | |
| 55 | #include <dev/usb/usb.h> |
| 56 | #include <dev/usb/usbhid.h> |
| 57 | |
| 58 | #include <dev/usb/usbdevs.h> |
| 59 | #include <dev/usb/usbdi.h> |
| 60 | #include <dev/usb/usbdi_util.h> |
| 61 | |
| 62 | #include <dev/usb/uhidev.h> |
| 63 | #include <dev/usb/uhid.h> |
| 64 | |
| 65 | #ifdef UHID_DEBUG |
| 66 | #define DPRINTF(x) do { if (uhiddebug) printf x; } while (0) |
| 67 | #define DPRINTFN(n,x) do { if (uhiddebug>(n)) printf x; } while (0) |
| 68 | int uhiddebug = 0; |
| 69 | #else |
| 70 | #define DPRINTF(x) |
| 71 | #define DPRINTFN(n,x) |
| 72 | #endif |
| 73 | |
| 74 | int uhid_match(struct device *, void *, void *); |
| 75 | |
| 76 | struct cfdriver uhid_cd = { |
| 77 | NULL((void *)0), "uhid", DV_DULL |
| 78 | }; |
| 79 | |
| 80 | const struct cfattach uhid_ca = { |
| 81 | sizeof(struct uhid_softc), |
| 82 | uhid_match, |
| 83 | uhid_attach, |
| 84 | uhid_detach, |
| 85 | }; |
| 86 | |
| 87 | struct uhid_softc * |
| 88 | uhid_lookup(dev_t dev) |
| 89 | { |
| 90 | struct uhid_softc *sc = NULL((void *)0); |
| 91 | struct cdevsw *cdev; |
| 92 | struct cfdriver *cd; |
| 93 | |
| 94 | cdev = &cdevsw[major(dev)(((unsigned)(dev) >> 8) & 0xff)]; |
| 95 | if (cdev->d_open == uhidopen) |
| 96 | cd = &uhid_cd; |
| 97 | #if NFIDO1 > 0 |
| 98 | else if (cdev->d_open == fidoopen) |
| 99 | cd = &fido_cd; |
| 100 | #endif |
| 101 | #if NUJOY1 > 0 |
| 102 | else if (cdev->d_open == ujoyopen) |
| 103 | cd = &ujoy_cd; |
| 104 | #endif |
| 105 | else |
| 106 | return (NULL((void *)0)); |
| 107 | if (UHIDUNIT(dev)(((unsigned)((dev) & 0xff) | (((dev) & 0xffff0000) >> 8))) < cd->cd_ndevs) |
| 108 | sc = cd->cd_devs[UHIDUNIT(dev)(((unsigned)((dev) & 0xff) | (((dev) & 0xffff0000) >> 8)))]; |
| 109 | |
| 110 | return (sc); |
| 111 | } |
| 112 | |
| 113 | int |
| 114 | uhid_match(struct device *parent, void *match, void *aux) |
| 115 | { |
| 116 | struct uhidev_attach_arg *uha = aux; |
| 117 | |
| 118 | if (UHIDEV_CLAIM_MULTIPLE_REPORTID(uha)((uha)->claimed != ((void *)0))) |
| 119 | return (UMATCH_NONE0); |
| 120 | |
| 121 | return (UMATCH_IFACECLASS_GENERIC2); |
| 122 | } |
| 123 | |
| 124 | void |
| 125 | uhid_attach(struct device *parent, struct device *self, void *aux) |
| 126 | { |
| 127 | struct uhid_softc *sc = (struct uhid_softc *)self; |
| 128 | struct uhidev_attach_arg *uha = (struct uhidev_attach_arg *)aux; |
| 129 | int size, repid; |
| 130 | void *desc; |
| 131 | |
| 132 | sc->sc_hdev.sc_intr = uhid_intr; |
| 133 | sc->sc_hdev.sc_parent = uha->parent; |
| 134 | sc->sc_hdev.sc_udev = uha->uaa->device; |
| 135 | sc->sc_hdev.sc_report_id = uha->reportid; |
| 136 | |
| 137 | uhidev_get_report_desc(uha->parent, &desc, &size); |
| 138 | repid = uha->reportid; |
| 139 | sc->sc_hdev.sc_isize = hid_report_size(desc, size, hid_input, repid); |
| 140 | sc->sc_hdev.sc_osize = hid_report_size(desc, size, hid_output, repid); |
| 141 | sc->sc_hdev.sc_fsize = hid_report_size(desc, size, hid_feature, repid); |
| 142 | |
| 143 | printf(": input=%d, output=%d, feature=%d\n", |
| 144 | sc->sc_hdev.sc_isize, sc->sc_hdev.sc_osize, sc->sc_hdev.sc_fsize); |
| 145 | } |
| 146 | |
| 147 | int |
| 148 | uhid_detach(struct device *self, int flags) |
| 149 | { |
| 150 | struct uhid_softc *sc = (struct uhid_softc *)self; |
| 151 | int s; |
| 152 | int maj, mn; |
| 153 | |
| 154 | DPRINTF(("uhid_detach: sc=%p flags=%d\n", sc, flags)); |
| 155 | |
| 156 | if (sc->sc_hdev.sc_state & UHIDEV_OPEN0x01) { |
| 157 | s = splusb()splraise(0x5); |
| 158 | if (--sc->sc_refcnt >= 0) { |
| 159 | /* Wake everyone */ |
| 160 | wakeup(&sc->sc_q); |
| 161 | /* Wait for processes to go away. */ |
| 162 | usb_detach_wait(&sc->sc_hdev.sc_dev); |
| 163 | } |
| 164 | splx(s)spllower(s); |
| 165 | } |
| 166 | |
| 167 | /* locate the major number */ |
| 168 | for (maj = 0; maj < nchrdev; maj++) |
| 169 | if (cdevsw[maj].d_open == uhidopen) |
| 170 | break; |
| 171 | |
| 172 | /* Nuke the vnodes for any open instances (calls close). */ |
| 173 | mn = self->dv_unit; |
| 174 | vdevgone(maj, mn, mn, VCHR); |
| 175 | |
| 176 | s = splusb()splraise(0x5); |
| 177 | klist_invalidate(&sc->sc_rsel.si_note); |
| 178 | splx(s)spllower(s); |
| 179 | |
| 180 | return (0); |
| 181 | } |
| 182 | |
| 183 | void |
| 184 | uhid_intr(struct uhidev *addr, void *data, u_int len) |
| 185 | { |
| 186 | struct uhid_softc *sc = (struct uhid_softc *)addr; |
| 187 | |
| 188 | #ifdef UHID_DEBUG |
| 189 | if (uhiddebug > 5) { |
| 190 | u_int32_t i; |
| 191 | |
| 192 | DPRINTF(("uhid_intr: data =")); |
| 193 | for (i = 0; i < len; i++) |
| 194 | DPRINTF((" %02x", ((u_char *)data)[i])); |
| 195 | DPRINTF(("\n")); |
| 196 | } |
| 197 | #endif |
| 198 | |
| 199 | (void)b_to_q(data, len, &sc->sc_q); |
| 200 | |
| 201 | if (sc->sc_state & UHID_ASLP0x01) { |
| 202 | sc->sc_state &= ~UHID_ASLP0x01; |
| 203 | DPRINTFN(5, ("uhid_intr: waking %p\n", &sc->sc_q)); |
| 204 | wakeup(&sc->sc_q); |
| 205 | } |
| 206 | selwakeup(&sc->sc_rsel); |
| 207 | } |
| 208 | |
| 209 | int |
| 210 | uhidopen(dev_t dev, int flag, int mode, struct proc *p) |
| 211 | { |
| 212 | return (uhid_do_open(dev, flag, mode, p)); |
| 213 | } |
| 214 | |
| 215 | int |
| 216 | uhid_do_open(dev_t dev, int flag, int mode, struct proc *p) |
| 217 | { |
| 218 | struct uhid_softc *sc; |
| 219 | int error; |
| 220 | |
| 221 | if ((sc = uhid_lookup(dev)) == NULL((void *)0)) |
| 222 | return (ENXIO6); |
| 223 | |
| 224 | DPRINTF(("uhidopen: sc=%p\n", sc)); |
| 225 | |
| 226 | if (usbd_is_dying(sc->sc_hdev.sc_udev)) |
| 227 | return (ENXIO6); |
| 228 | |
| 229 | error = uhidev_open(&sc->sc_hdev); |
| 230 | if (error) |
| 231 | return (error); |
| 232 | |
| 233 | clalloc(&sc->sc_q, UHID_BSIZE1020, 0); |
| 234 | |
| 235 | sc->sc_obuf = malloc(sc->sc_hdev.sc_osize, M_USBDEV102, M_WAITOK0x0001); |
| 236 | |
| 237 | return (0); |
| 238 | } |
| 239 | |
| 240 | int |
| 241 | uhidclose(dev_t dev, int flag, int mode, struct proc *p) |
| 242 | { |
| 243 | struct uhid_softc *sc; |
| 244 | |
| 245 | if ((sc = uhid_lookup(dev)) == NULL((void *)0)) |
| 246 | return (ENXIO6); |
| 247 | |
| 248 | DPRINTF(("uhidclose: sc=%p\n", sc)); |
| 249 | |
| 250 | clfree(&sc->sc_q); |
| 251 | free(sc->sc_obuf, M_USBDEV102, sc->sc_hdev.sc_osize); |
| 252 | uhidev_close(&sc->sc_hdev); |
| 253 | |
| 254 | return (0); |
| 255 | } |
| 256 | |
| 257 | int |
| 258 | uhid_do_read(struct uhid_softc *sc, struct uio *uio, int flag) |
| 259 | { |
| 260 | int s; |
| 261 | int error = 0; |
| 262 | size_t length; |
| 263 | u_char buffer[UHID_CHUNK128]; |
| 264 | |
| 265 | DPRINTFN(1, ("uhidread\n")); |
| 266 | |
| 267 | s = splusb()splraise(0x5); |
| 268 | while (sc->sc_q.c_cc == 0) { |
| 269 | if (flag & IO_NDELAY0x10) { |
| 270 | splx(s)spllower(s); |
| 271 | return (EWOULDBLOCK35); |
| 272 | } |
| 273 | sc->sc_state |= UHID_ASLP0x01; |
| 274 | DPRINTFN(5, ("uhidread: sleep on %p\n", &sc->sc_q)); |
| 275 | error = tsleep_nsec(&sc->sc_q, PZERO22|PCATCH0x100, "uhidrea", INFSLP0xffffffffffffffffULL); |
| 276 | DPRINTFN(5, ("uhidread: woke, error=%d\n", error)); |
| 277 | if (usbd_is_dying(sc->sc_hdev.sc_udev)) |
| 278 | error = EIO5; |
| 279 | if (error) { |
| 280 | sc->sc_state &= ~UHID_ASLP0x01; |
| 281 | break; |
| 282 | } |
| 283 | } |
| 284 | splx(s)spllower(s); |
| 285 | |
| 286 | /* Transfer as many chunks as possible. */ |
| 287 | while (sc->sc_q.c_cc > 0 && uio->uio_resid > 0 && !error) { |
| 288 | length = ulmin(sc->sc_q.c_cc, uio->uio_resid); |
| 289 | if (length > sizeof(buffer)) |
| 290 | length = sizeof(buffer); |
| 291 | |
| 292 | /* Remove a small chunk from the input queue. */ |
| 293 | (void) q_to_b(&sc->sc_q, buffer, length); |
| 294 | DPRINTFN(5, ("uhidread: got %zu chars\n", length)); |
| 295 | |
| 296 | /* Copy the data to the user process. */ |
| 297 | if ((error = uiomove(buffer, length, uio)) != 0) |
| 298 | break; |
| 299 | } |
| 300 | |
| 301 | return (error); |
| 302 | } |
| 303 | |
| 304 | int |
| 305 | uhidread(dev_t dev, struct uio *uio, int flag) |
| 306 | { |
| 307 | struct uhid_softc *sc; |
| 308 | int error; |
| 309 | |
| 310 | if ((sc = uhid_lookup(dev)) == NULL((void *)0)) |
| 311 | return (ENXIO6); |
| 312 | |
| 313 | sc->sc_refcnt++; |
| 314 | error = uhid_do_read(sc, uio, flag); |
| 315 | if (--sc->sc_refcnt < 0) |
| 316 | usb_detach_wakeup(&sc->sc_hdev.sc_dev); |
| 317 | return (error); |
| 318 | } |
| 319 | |
| 320 | int |
| 321 | uhid_do_write(struct uhid_softc *sc, struct uio *uio, int flag) |
| 322 | { |
| 323 | int error; |
| 324 | int size; |
| 325 | |
| 326 | DPRINTFN(1, ("uhidwrite\n")); |
| 327 | |
| 328 | if (usbd_is_dying(sc->sc_hdev.sc_udev)) |
| 329 | return (EIO5); |
| 330 | |
| 331 | size = sc->sc_hdev.sc_osize; |
| 332 | error = 0; |
Value stored to 'error' is never read | |
| 333 | if (uio->uio_resid > size) |
| 334 | return (EMSGSIZE40); |
| 335 | else if (uio->uio_resid < size) { |
| 336 | /* don't leak kernel memory to the USB device */ |
| 337 | memset(sc->sc_obuf + uio->uio_resid, 0, size - uio->uio_resid)__builtin_memset((sc->sc_obuf + uio->uio_resid), (0), ( size - uio->uio_resid)); |
| 338 | } |
| 339 | error = uiomove(sc->sc_obuf, uio->uio_resid, uio); |
| 340 | if (!error) { |
| 341 | if (uhidev_set_report(sc->sc_hdev.sc_parent, |
| 342 | UHID_OUTPUT_REPORT0x02, sc->sc_hdev.sc_report_id, sc->sc_obuf, |
| 343 | size) != size) |
| 344 | error = EIO5; |
| 345 | } |
| 346 | |
| 347 | return (error); |
| 348 | } |
| 349 | |
| 350 | int |
| 351 | uhidwrite(dev_t dev, struct uio *uio, int flag) |
| 352 | { |
| 353 | struct uhid_softc *sc; |
| 354 | int error; |
| 355 | |
| 356 | if ((sc = uhid_lookup(dev)) == NULL((void *)0)) |
| 357 | return (ENXIO6); |
| 358 | |
| 359 | sc->sc_refcnt++; |
| 360 | error = uhid_do_write(sc, uio, flag); |
| 361 | if (--sc->sc_refcnt < 0) |
| 362 | usb_detach_wakeup(&sc->sc_hdev.sc_dev); |
| 363 | return (error); |
| 364 | } |
| 365 | |
| 366 | int |
| 367 | uhid_do_ioctl(struct uhid_softc *sc, u_long cmd, caddr_t addr, |
| 368 | int flag, struct proc *p) |
| 369 | { |
| 370 | int rc; |
| 371 | |
| 372 | DPRINTFN(2, ("uhidioctl: cmd=%lx\n", cmd)); |
| 373 | |
| 374 | if (usbd_is_dying(sc->sc_hdev.sc_udev)) |
| 375 | return (EIO5); |
| 376 | |
| 377 | switch (cmd) { |
| 378 | case FIONBIO((unsigned long)0x80000000 | ((sizeof(int) & 0x1fff) << 16) | ((('f')) << 8) | ((126))): |
| 379 | case FIOASYNC((unsigned long)0x80000000 | ((sizeof(int) & 0x1fff) << 16) | ((('f')) << 8) | ((125))): |
| 380 | /* All handled in the upper FS layer. */ |
| 381 | break; |
| 382 | |
| 383 | case USB_GET_DEVICEINFO((unsigned long)0x40000000 | ((sizeof(struct usb_device_info) & 0x1fff) << 16) | ((('U')) << 8) | ((112))): |
| 384 | usbd_fill_deviceinfo(sc->sc_hdev.sc_udev, |
| 385 | (struct usb_device_info *)addr); |
| 386 | break; |
| 387 | |
| 388 | case USB_GET_REPORT_DESC((unsigned long)0x40000000 | ((sizeof(struct usb_ctl_report_desc ) & 0x1fff) << 16) | ((('U')) << 8) | ((21))): |
| 389 | case USB_GET_REPORT(((unsigned long)0x80000000|(unsigned long)0x40000000) | ((sizeof (struct usb_ctl_report) & 0x1fff) << 16) | ((('U')) << 8) | ((23))): |
| 390 | case USB_SET_REPORT((unsigned long)0x80000000 | ((sizeof(struct usb_ctl_report) & 0x1fff) << 16) | ((('U')) << 8) | ((24))): |
| 391 | case USB_GET_REPORT_ID((unsigned long)0x40000000 | ((sizeof(int) & 0x1fff) << 16) | ((('U')) << 8) | ((25))): |
| 392 | default: |
| 393 | rc = uhidev_ioctl(&sc->sc_hdev, cmd, addr, flag, p); |
| 394 | if (rc == -1) |
| 395 | rc = ENOTTY25; |
| 396 | return rc; |
| 397 | } |
| 398 | return (0); |
| 399 | } |
| 400 | |
| 401 | int |
| 402 | uhidioctl(dev_t dev, u_long cmd, caddr_t addr, int flag, struct proc *p) |
| 403 | { |
| 404 | struct uhid_softc *sc; |
| 405 | int error; |
| 406 | |
| 407 | if ((sc = uhid_lookup(dev)) == NULL((void *)0)) |
| 408 | return (ENXIO6); |
| 409 | |
| 410 | sc->sc_refcnt++; |
| 411 | error = uhid_do_ioctl(sc, cmd, addr, flag, p); |
| 412 | if (--sc->sc_refcnt < 0) |
| 413 | usb_detach_wakeup(&sc->sc_hdev.sc_dev); |
| 414 | return (error); |
| 415 | } |
| 416 | |
| 417 | int |
| 418 | uhidpoll(dev_t dev, int events, struct proc *p) |
| 419 | { |
| 420 | struct uhid_softc *sc; |
| 421 | int revents = 0; |
| 422 | int s; |
| 423 | |
| 424 | if ((sc = uhid_lookup(dev)) == NULL((void *)0)) |
| 425 | return (POLLERR0x0008); |
| 426 | |
| 427 | if (usbd_is_dying(sc->sc_hdev.sc_udev)) |
| 428 | return (POLLHUP0x0010); |
| 429 | |
| 430 | s = splusb()splraise(0x5); |
| 431 | if (events & (POLLOUT0x0004 | POLLWRNORM0x0004)) |
| 432 | revents |= events & (POLLOUT0x0004 | POLLWRNORM0x0004); |
| 433 | if (events & (POLLIN0x0001 | POLLRDNORM0x0040)) { |
| 434 | if (sc->sc_q.c_cc > 0) |
| 435 | revents |= events & (POLLIN0x0001 | POLLRDNORM0x0040); |
| 436 | else |
| 437 | selrecord(p, &sc->sc_rsel); |
| 438 | } |
| 439 | |
| 440 | splx(s)spllower(s); |
| 441 | return (revents); |
| 442 | } |
| 443 | |
| 444 | void filt_uhidrdetach(struct knote *); |
| 445 | int filt_uhidread(struct knote *, long); |
| 446 | int uhidkqfilter(dev_t, struct knote *); |
| 447 | |
| 448 | void |
| 449 | filt_uhidrdetach(struct knote *kn) |
| 450 | { |
| 451 | struct uhid_softc *sc = (void *)kn->kn_hook; |
| 452 | int s; |
| 453 | |
| 454 | s = splusb()splraise(0x5); |
| 455 | klist_remove_locked(&sc->sc_rsel.si_note, kn); |
| 456 | splx(s)spllower(s); |
| 457 | } |
| 458 | |
| 459 | int |
| 460 | filt_uhidread(struct knote *kn, long hint) |
| 461 | { |
| 462 | struct uhid_softc *sc = (void *)kn->kn_hook; |
| 463 | |
| 464 | kn->kn_datakn_kevent.data = sc->sc_q.c_cc; |
| 465 | return (kn->kn_datakn_kevent.data > 0); |
| 466 | } |
| 467 | |
| 468 | const struct filterops uhidread_filtops = { |
| 469 | .f_flags = FILTEROP_ISFD0x00000001, |
| 470 | .f_attach = NULL((void *)0), |
| 471 | .f_detach = filt_uhidrdetach, |
| 472 | .f_event = filt_uhidread, |
| 473 | }; |
| 474 | |
| 475 | int |
| 476 | uhidkqfilter(dev_t dev, struct knote *kn) |
| 477 | { |
| 478 | struct uhid_softc *sc; |
| 479 | struct klist *klist; |
| 480 | int s; |
| 481 | |
| 482 | if ((sc = uhid_lookup(dev)) == NULL((void *)0)) |
| 483 | return (ENXIO6); |
| 484 | |
| 485 | if (usbd_is_dying(sc->sc_hdev.sc_udev)) |
| 486 | return (ENXIO6); |
| 487 | |
| 488 | switch (kn->kn_filterkn_kevent.filter) { |
| 489 | case EVFILT_READ(-1): |
| 490 | klist = &sc->sc_rsel.si_note; |
| 491 | kn->kn_fop = &uhidread_filtops; |
| 492 | break; |
| 493 | |
| 494 | case EVFILT_WRITE(-2): |
| 495 | return (seltrue_kqfilter(dev, kn)); |
| 496 | |
| 497 | default: |
| 498 | return (EINVAL22); |
| 499 | } |
| 500 | |
| 501 | kn->kn_hook = (void *)sc; |
| 502 | |
| 503 | s = splusb()splraise(0x5); |
| 504 | klist_insert_locked(klist, kn); |
| 505 | splx(s)spllower(s); |
| 506 | |
| 507 | return (0); |
| 508 | } |