Annotation of sys/dev/usb/if_cdcef.c, Revision 1.1
1.1 ! nbrk 1: /* $OpenBSD: if_cdcef.c,v 1.17 2007/06/14 06:55:10 mbalmer Exp $ */
! 2:
! 3: /*
! 4: * Copyright (c) 2007 Dale Rahn <drahn@openbsd.org>
! 5: * Copyright (c) 2006 Uwe Stuehler <uwe@openbsd.org>
! 6: *
! 7: * Permission to use, copy, modify, and distribute this software for any
! 8: * purpose with or without fee is hereby granted, provided that the above
! 9: * copyright notice and this permission notice appear in all copies.
! 10: *
! 11: * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
! 12: * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
! 13: * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
! 14: * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
! 15: * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
! 16: * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
! 17: * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
! 18: */
! 19:
! 20: /*
! 21: * USB Communication Device Class Ethernet Emulation Model function driver
! 22: * (counterpart of the host-side cdce(4) driver)
! 23: */
! 24: #include <bpfilter.h>
! 25:
! 26:
! 27: #include <sys/param.h>
! 28: #include <sys/device.h>
! 29: #include <sys/socket.h>
! 30: #include <sys/systm.h>
! 31: #include <sys/mbuf.h>
! 32: #include <sys/timeout.h>
! 33:
! 34: #include <net/if.h>
! 35:
! 36: #include <dev/usb/usb.h>
! 37: #include <dev/usb/usbdi.h>
! 38: #include <dev/usb/usbf.h>
! 39: #include <dev/usb/usbcdc.h>
! 40:
! 41: #if NBPFILTER > 0
! 42: #include <net/bpf.h>
! 43: #endif
! 44:
! 45: #include <netinet/in.h>
! 46: #include <netinet/in_systm.h>
! 47: #include <netinet/in_var.h>
! 48: #include <netinet/ip.h>
! 49: #include <netinet/if_ether.h>
! 50:
! 51:
! 52: #define CDCEF_VENDOR_ID 0x0001
! 53: #define CDCEF_PRODUCT_ID 0x0001
! 54: #define CDCEF_DEVICE_CODE 0x0100
! 55: #define CDCEF_VENDOR_STRING "OpenBSD.org"
! 56: #define CDCEF_PRODUCT_STRING "CDC Ethernet Emulation"
! 57: #define CDCEF_SERIAL_STRING "1.00"
! 58:
! 59: #define CDCEF_BUFSZ 1600
! 60:
! 61:
! 62: struct cdcef_softc {
! 63: struct usbf_function sc_dev;
! 64: usbf_config_handle sc_config;
! 65: usbf_interface_handle sc_iface;
! 66: usbf_endpoint_handle sc_ep_in;
! 67: usbf_endpoint_handle sc_ep_out;
! 68: usbf_pipe_handle sc_pipe_in;
! 69: usbf_pipe_handle sc_pipe_out;
! 70: usbf_xfer_handle sc_xfer_in;
! 71: usbf_xfer_handle sc_xfer_out;
! 72: void *sc_buffer_in;
! 73: void *sc_buffer_out;
! 74:
! 75: struct timeout start_to;
! 76:
! 77: struct mbuf *sc_xmit_mbuf;
! 78:
! 79: struct arpcom sc_arpcom;
! 80: #define GET_IFP(sc) (&(sc)->sc_arpcom.ac_if)
! 81:
! 82: int sc_rxeof_errors;
! 83: int sc_unit;
! 84: int sc_attached;
! 85: int sc_listening;
! 86: };
! 87:
! 88: int cdcef_match(struct device *, void *, void *);
! 89: void cdcef_attach(struct device *, struct device *, void *);
! 90:
! 91: usbf_status cdcef_do_request(usbf_function_handle,
! 92: usb_device_request_t *, void **);
! 93:
! 94: void cdcef_start(struct ifnet *);
! 95:
! 96: void cdcef_txeof(usbf_xfer_handle, usbf_private_handle,
! 97: usbf_status);
! 98: void cdcef_rxeof(usbf_xfer_handle, usbf_private_handle,
! 99: usbf_status);
! 100: int cdcef_ioctl(struct ifnet *ifp, u_long command, caddr_t data);
! 101: void cdcef_watchdog(struct ifnet *ifp);
! 102: void cdcef_init(struct cdcef_softc *);
! 103: void cdcef_stop(struct cdcef_softc *);
! 104: int cdcef_encap(struct cdcef_softc *sc, struct mbuf *m, int idx);
! 105: struct mbuf * cdcef_newbuf(void);
! 106: void cdcef_start_timeout (void *);
! 107:
! 108: struct cfattach cdcef_ca = {
! 109: sizeof(struct cdcef_softc), cdcef_match, cdcef_attach
! 110: };
! 111:
! 112: struct cfdriver cdcef_cd = {
! 113: NULL, "cdcef", DV_DULL
! 114: };
! 115:
! 116: struct usbf_function_methods cdcef_methods = {
! 117: NULL, /* set_config */
! 118: cdcef_do_request
! 119: };
! 120:
! 121: #ifndef CDCEF_DEBUG
! 122: #define DPRINTF(x) do {} while (0)
! 123: #else
! 124: #define DPRINTF(x) printf x
! 125: #endif
! 126:
! 127: #define DEVNAME(sc) ((sc)->sc_dev.bdev.dv_xname)
! 128:
! 129: /*
! 130: * USB function match/attach/detach
! 131: */
! 132:
! 133: int
! 134: cdcef_match(struct device *parent, void *match, void *aux)
! 135: {
! 136: return UMATCH_GENERIC;
! 137: }
! 138:
! 139: void
! 140: cdcef_attach(struct device *parent, struct device *self, void *aux)
! 141: {
! 142: struct cdcef_softc *sc = (struct cdcef_softc *)self;
! 143: struct usbf_attach_arg *uaa = aux;
! 144: usbf_device_handle dev = uaa->device;
! 145: char *devinfop;
! 146: struct ifnet *ifp;
! 147: usbf_status err;
! 148: usb_cdc_union_descriptor_t udesc;
! 149: int s;
! 150: u_int16_t macaddr_hi;
! 151:
! 152:
! 153: /* Set the device identification according to the function. */
! 154: usbf_devinfo_setup(dev, UDCLASS_IN_INTERFACE, 0, 0, CDCEF_VENDOR_ID,
! 155: CDCEF_PRODUCT_ID, CDCEF_DEVICE_CODE, CDCEF_VENDOR_STRING,
! 156: CDCEF_PRODUCT_STRING, CDCEF_SERIAL_STRING);
! 157:
! 158: devinfop = usbf_devinfo_alloc(dev);
! 159: printf(": %s\n", devinfop);
! 160: usbf_devinfo_free(devinfop);
! 161:
! 162: /* Fill in the fields needed by the parent device. */
! 163: sc->sc_dev.methods = &cdcef_methods;
! 164:
! 165: /* timeout to start delayed tranfers */
! 166: timeout_set(&sc->start_to, cdcef_start_timeout, sc);
! 167:
! 168: /*
! 169: * Build descriptors according to the device class specification.
! 170: */
! 171: err = usbf_add_config(dev, &sc->sc_config);
! 172: if (err) {
! 173: printf("%s: usbf_add_config failed\n", DEVNAME(sc));
! 174: return;
! 175: }
! 176: err = usbf_add_interface(sc->sc_config, UICLASS_CDC,
! 177: UISUBCLASS_ETHERNET_NETWORKING_CONTROL_MODEL, 0, NULL,
! 178: &sc->sc_iface);
! 179: if (err) {
! 180: printf("%s: usbf_add_interface failed\n", DEVNAME(sc));
! 181: return;
! 182: }
! 183: /* XXX don't use hard-coded values 128 and 16. */
! 184: err = usbf_add_endpoint(sc->sc_iface, UE_DIR_IN | 2, UE_BULK,
! 185: 64, 16, &sc->sc_ep_in) ||
! 186: usbf_add_endpoint(sc->sc_iface, UE_DIR_OUT | 1, UE_BULK,
! 187: 64, 16, &sc->sc_ep_out);
! 188: if (err) {
! 189: printf("%s: usbf_add_endpoint failed\n", DEVNAME(sc));
! 190: return;
! 191: }
! 192:
! 193: /* Append a CDC union descriptor. */
! 194: bzero(&udesc, sizeof udesc);
! 195: udesc.bLength = sizeof udesc;
! 196: udesc.bDescriptorType = UDESC_CS_INTERFACE;
! 197: udesc.bDescriptorSubtype = UDESCSUB_CDC_UNION;
! 198: udesc.bSlaveInterface[0] = usbf_interface_number(sc->sc_iface);
! 199: err = usbf_add_config_desc(sc->sc_config,
! 200: (usb_descriptor_t *)&udesc, NULL);
! 201: if (err) {
! 202: printf("%s: usbf_add_config_desc failed\n", DEVNAME(sc));
! 203: return;
! 204: }
! 205:
! 206: /*
! 207: * Close the configuration and build permanent descriptors.
! 208: */
! 209: err = usbf_end_config(sc->sc_config);
! 210: if (err) {
! 211: printf("%s: usbf_end_config failed\n", DEVNAME(sc));
! 212: return;
! 213: }
! 214:
! 215: /* Preallocate xfers and data buffers. */
! 216: sc->sc_xfer_in = usbf_alloc_xfer(dev);
! 217: sc->sc_xfer_out = usbf_alloc_xfer(dev);
! 218: sc->sc_buffer_in = usbf_alloc_buffer(sc->sc_xfer_in,
! 219: CDCEF_BUFSZ);
! 220: sc->sc_buffer_out = usbf_alloc_buffer(sc->sc_xfer_out,
! 221: CDCEF_BUFSZ);
! 222: if (sc->sc_buffer_in == NULL || sc->sc_buffer_out == NULL) {
! 223: printf("%s: usbf_alloc_buffer failed\n", DEVNAME(sc));
! 224: return;
! 225: }
! 226:
! 227: /* Open the bulk pipes. */
! 228: err = usbf_open_pipe(sc->sc_iface,
! 229: usbf_endpoint_address(sc->sc_ep_out), &sc->sc_pipe_out) ||
! 230: usbf_open_pipe(sc->sc_iface,
! 231: usbf_endpoint_address(sc->sc_ep_in), &sc->sc_pipe_in);
! 232: if (err) {
! 233: printf("%s: usbf_open_pipe failed\n", DEVNAME(sc));
! 234: return;
! 235: }
! 236:
! 237: /* Get ready to receive packets. */
! 238: usbf_setup_xfer(sc->sc_xfer_out, sc->sc_pipe_out, sc,
! 239: sc->sc_buffer_out, CDCEF_BUFSZ, USBD_SHORT_XFER_OK, 0, cdcef_rxeof);
! 240: err = usbf_transfer(sc->sc_xfer_out);
! 241: if (err && err != USBF_IN_PROGRESS) {
! 242: printf("%s: usbf_transfer failed\n", DEVNAME(sc));
! 243: return;
! 244: }
! 245:
! 246: s = splnet();
! 247:
! 248: macaddr_hi = htons(0x2acb);
! 249: bcopy(&macaddr_hi, &sc->sc_arpcom.ac_enaddr[0], sizeof(u_int16_t));
! 250: bcopy(&ticks, &sc->sc_arpcom.ac_enaddr[2], sizeof(u_int32_t));
! 251: sc->sc_arpcom.ac_enaddr[5] = (u_int8_t)(sc->sc_unit);
! 252:
! 253: printf("%s: address %s\n", DEVNAME(sc),
! 254: ether_sprintf(sc->sc_arpcom.ac_enaddr));
! 255:
! 256: ifp = GET_IFP(sc);
! 257: ifp->if_softc = sc;
! 258: ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST;
! 259: ifp->if_ioctl = cdcef_ioctl;
! 260: ifp->if_start = cdcef_start;
! 261: ifp->if_watchdog = cdcef_watchdog;
! 262: strlcpy(ifp->if_xname, DEVNAME(sc), IFNAMSIZ);
! 263:
! 264: IFQ_SET_READY(&ifp->if_snd);
! 265:
! 266: if_attach(ifp);
! 267: ether_ifattach(ifp);
! 268:
! 269: sc->sc_attached = 1;
! 270: splx(s);
! 271: }
! 272:
! 273: usbf_status
! 274: cdcef_do_request(usbf_function_handle fun, usb_device_request_t *req,
! 275: void **data)
! 276: {
! 277: printf("cdcef_do_request\n");
! 278: return USBF_STALLED;
! 279: }
! 280:
! 281: void
! 282: cdcef_start(struct ifnet *ifp)
! 283: {
! 284: struct cdcef_softc *sc = ifp->if_softc;
! 285: struct mbuf *m_head = NULL;
! 286:
! 287: if(ifp->if_flags & IFF_OACTIVE)
! 288: return;
! 289:
! 290: IFQ_POLL(&ifp->if_snd, m_head);
! 291: if (m_head == NULL) {
! 292: return;
! 293: }
! 294:
! 295: if (sc->sc_listening == 0 || m_head->m_pkthdr.len > CDCEF_BUFSZ) {
! 296: /*
! 297: * drop packet because reciever is not listening,
! 298: * or if packet is larger than xmit buffer
! 299: */
! 300: IFQ_DEQUEUE(&ifp->if_snd, m_head);
! 301: m_freem(m_head);
! 302: return;
! 303: }
! 304:
! 305: if (cdcef_encap(sc, m_head, 0)) {
! 306: ifp->if_flags |= IFF_OACTIVE;
! 307: return;
! 308: }
! 309:
! 310: IFQ_DEQUEUE(&ifp->if_snd, m_head);
! 311:
! 312: #if NBPFILTER > 0
! 313: if (ifp->if_bpf)
! 314: bpf_mtap(ifp->if_bpf, m_head, BPF_DIRECTION_OUT);
! 315: #endif
! 316:
! 317: ifp->if_flags |= IFF_OACTIVE;
! 318:
! 319: ifp->if_timer = 6;
! 320: }
! 321:
! 322: void
! 323: cdcef_txeof(usbf_xfer_handle xfer, usbf_private_handle priv,
! 324: usbf_status err)
! 325: {
! 326: struct cdcef_softc *sc = priv;
! 327: struct ifnet *ifp = GET_IFP(sc);
! 328: int s;
! 329:
! 330: s = splnet();
! 331: #if 0
! 332: printf("cdcef_txeof: xfer=%p, priv=%p, %s\n", xfer, priv,
! 333: usbf_errstr(err));
! 334: #endif
! 335:
! 336: ifp->if_timer = 0;
! 337: ifp->if_flags &= ~IFF_OACTIVE;
! 338:
! 339: if (sc->sc_xmit_mbuf != NULL) {
! 340: m_freem(sc->sc_xmit_mbuf);
! 341: sc->sc_xmit_mbuf = NULL;
! 342: }
! 343:
! 344: if (err)
! 345: ifp->if_oerrors++;
! 346: else
! 347: ifp->if_opackets++;
! 348:
! 349: if (IFQ_IS_EMPTY(&ifp->if_snd) == 0)
! 350: timeout_add(&sc->start_to, 1); /* XXX */
! 351:
! 352: splx(s);
! 353: }
! 354: void
! 355: cdcef_start_timeout (void *v)
! 356: {
! 357: struct cdcef_softc *sc = v;
! 358: struct ifnet *ifp = GET_IFP(sc);
! 359: int s;
! 360:
! 361: s = splnet();
! 362: cdcef_start(ifp);
! 363: splx(s);
! 364: }
! 365:
! 366:
! 367: void
! 368: cdcef_rxeof(usbf_xfer_handle xfer, usbf_private_handle priv,
! 369: usbf_status status)
! 370: {
! 371: struct cdcef_softc *sc = priv;
! 372: int total_len = 0;
! 373: struct ifnet *ifp = GET_IFP(sc);
! 374: struct mbuf *m = NULL;
! 375:
! 376:
! 377: int s;
! 378:
! 379: #if 0
! 380: printf("cdcef_rxeof: xfer=%p, priv=%p, %s\n", xfer, priv,
! 381: usbf_errstr(status));
! 382: #endif
! 383:
! 384: if (status != USBF_NORMAL_COMPLETION) {
! 385: if (status == USBF_NOT_STARTED || status == USBF_CANCELLED)
! 386: return;
! 387: if (sc->sc_rxeof_errors == 0)
! 388: printf("%s: usb error on rx: %s\n",
! 389: DEVNAME(sc), usbf_errstr(status));
! 390: /* XXX - no stalls on client */
! 391: if (sc->sc_rxeof_errors++ > 10) {
! 392: printf("%s: too many errors, disabling\n",
! 393: DEVNAME(sc));
! 394: /* sc->sc_dying = 1; */
! 395: // return;
! 396: }
! 397: goto done;
! 398: }
! 399: sc->sc_rxeof_errors = 0;
! 400:
! 401: /* upon first incoming packet we know the host is listening */
! 402: if (sc->sc_listening == 0) {
! 403: sc->sc_listening = 1;
! 404: }
! 405:
! 406:
! 407: usbf_get_xfer_status(xfer, NULL, NULL, &total_len, NULL);
! 408:
! 409: /* total_len -= 4; Strip off CRC added for Zaurus - XXX*/
! 410: if (total_len <= 1)
! 411: goto done;
! 412:
! 413: if (total_len < sizeof(struct ether_header)) {
! 414: ifp->if_ierrors++;
! 415: goto done;
! 416: }
! 417:
! 418: s = splnet();
! 419: if (ifp->if_flags & IFF_RUNNING) {
! 420: m = cdcef_newbuf();
! 421: if (m == NULL) {
! 422: /* message? */
! 423: ifp->if_ierrors++;
! 424: goto done1;
! 425: }
! 426:
! 427: m->m_pkthdr.len = m->m_len = total_len;
! 428: bcopy(sc->sc_buffer_out, mtod(m, char *), total_len);
! 429: m->m_pkthdr.rcvif = ifp;
! 430:
! 431: ifp->if_ipackets++;
! 432:
! 433: #if NBPFILTER > 0
! 434: if (ifp->if_bpf)
! 435: bpf_mtap(ifp->if_bpf, m, BPF_DIRECTION_IN);
! 436: #endif
! 437:
! 438: ether_input_mbuf(ifp, m);
! 439: }
! 440:
! 441: done1:
! 442: splx(s);
! 443:
! 444: done:
! 445: /* Setup another xfer. */
! 446: usbf_setup_xfer(xfer, sc->sc_pipe_out, sc, sc->sc_buffer_out,
! 447: CDCEF_BUFSZ, USBD_SHORT_XFER_OK, 0, cdcef_rxeof);
! 448:
! 449: status = usbf_transfer(xfer);
! 450: if (status && status != USBF_IN_PROGRESS) {
! 451: printf("%s: usbf_transfer failed\n", DEVNAME(sc));
! 452: return;
! 453: }
! 454: }
! 455:
! 456: struct mbuf *
! 457: cdcef_newbuf(void)
! 458: {
! 459: struct mbuf *m;
! 460:
! 461: MGETHDR(m, M_DONTWAIT, MT_DATA);
! 462: if (m == NULL)
! 463: return (NULL);
! 464:
! 465: MCLGET(m, M_DONTWAIT);
! 466: if (!(m->m_flags & M_EXT)) {
! 467: m_freem(m);
! 468: return (NULL);
! 469: }
! 470:
! 471: m->m_len = m->m_pkthdr.len = MCLBYTES;
! 472: m_adj(m, ETHER_ALIGN);
! 473:
! 474: return (m);
! 475: }
! 476:
! 477: int
! 478: cdcef_ioctl(struct ifnet *ifp, u_long command, caddr_t data)
! 479: {
! 480: struct cdcef_softc *sc = ifp->if_softc;
! 481: struct ifaddr *ifa = (struct ifaddr *)data;
! 482: struct ifreq *ifr = (struct ifreq *)data;
! 483: int s, error = 0;
! 484:
! 485: s = splnet();
! 486:
! 487: switch (command) {
! 488: case SIOCSIFADDR:
! 489: ifp->if_flags |= IFF_UP;
! 490: cdcef_init(sc);
! 491: switch (ifa->ifa_addr->sa_family) {
! 492: case AF_INET:
! 493: arp_ifinit(&sc->sc_arpcom, ifa);
! 494: break;
! 495: }
! 496: break;
! 497:
! 498: case SIOCSIFMTU:
! 499: if (ifr->ifr_mtu > ETHERMTU)
! 500: error = EINVAL;
! 501: else
! 502: ifp->if_mtu = ifr->ifr_mtu;
! 503: break;
! 504:
! 505: case SIOCSIFFLAGS:
! 506: if (ifp->if_flags & IFF_UP) {
! 507: if (!(ifp->if_flags & IFF_RUNNING))
! 508: cdcef_init(sc);
! 509: } else {
! 510: if (ifp->if_flags & IFF_RUNNING)
! 511: cdcef_stop(sc);
! 512: }
! 513: error = 0;
! 514: break;
! 515:
! 516: case SIOCADDMULTI:
! 517: case SIOCDELMULTI:
! 518: error = (command == SIOCADDMULTI) ?
! 519: ether_addmulti(ifr, &sc->sc_arpcom) :
! 520: ether_delmulti(ifr, &sc->sc_arpcom);
! 521:
! 522: if (error == ENETRESET)
! 523: error = 0;
! 524: break;
! 525:
! 526: default:
! 527: error = EINVAL;
! 528: break;
! 529: }
! 530:
! 531: splx(s);
! 532:
! 533: return (error);
! 534: }
! 535:
! 536: void
! 537: cdcef_watchdog(struct ifnet *ifp)
! 538: {
! 539: struct cdcef_softc *sc = ifp->if_softc;
! 540: int s;
! 541:
! 542: #if 0
! 543: if (sc->sc_dying)
! 544: return;
! 545: #endif
! 546:
! 547: ifp->if_oerrors++;
! 548: printf("%s: watchdog timeout\n", DEVNAME(sc));
! 549:
! 550: s = splusb();
! 551: ifp->if_timer = 0;
! 552: ifp->if_flags &= ~IFF_OACTIVE;
! 553:
! 554: /* cancel recieve pipe? */
! 555: usbf_abort_pipe(sc->sc_pipe_in); /* in is tx pipe */
! 556: splx(s);
! 557: }
! 558:
! 559: void
! 560: cdcef_init(struct cdcef_softc *sc)
! 561: {
! 562: int s;
! 563: struct ifnet *ifp = GET_IFP(sc);
! 564: if (ifp->if_flags & IFF_RUNNING)
! 565: return;
! 566: s = splnet();
! 567:
! 568: ifp->if_flags |= IFF_RUNNING;
! 569: ifp->if_flags &= ~IFF_OACTIVE;
! 570:
! 571: splx(s);
! 572: }
! 573:
! 574: int
! 575: cdcef_encap(struct cdcef_softc *sc, struct mbuf *m, int idx)
! 576: {
! 577: usbf_status err;
! 578:
! 579: m_copydata(m, 0, m->m_pkthdr.len, sc->sc_buffer_in);
! 580: /* NO CRC */
! 581:
! 582: usbf_setup_xfer(sc->sc_xfer_in, sc->sc_pipe_in, sc, sc->sc_buffer_in,
! 583: m->m_pkthdr.len, USBD_FORCE_SHORT_XFER | USBD_NO_COPY,
! 584: 10000, cdcef_txeof);
! 585:
! 586: err = usbf_transfer(sc->sc_xfer_in);
! 587: if (err && err != USBD_IN_PROGRESS) {
! 588: printf("encap error\n");
! 589: cdcef_stop(sc);
! 590: return (EIO);
! 591: }
! 592: sc->sc_xmit_mbuf = m;
! 593:
! 594: return (0);
! 595: }
! 596:
! 597:
! 598: void
! 599: cdcef_stop(struct cdcef_softc *sc)
! 600: {
! 601: struct ifnet *ifp = GET_IFP(sc);
! 602:
! 603: ifp->if_timer = 0;
! 604: ifp->if_flags &= ~(IFF_RUNNING | IFF_OACTIVE);
! 605:
! 606: /* cancel recieve pipe? */
! 607:
! 608: if (sc->sc_xmit_mbuf != NULL) {
! 609: m_freem(sc->sc_xmit_mbuf);
! 610: sc->sc_xmit_mbuf = NULL;
! 611: }
! 612: }
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Return to if_cdcef.c CVS log ![[TXT]](/icons/text.gif){kind=icon}
![[DIR]](/icons/dir.gif){kind=icon}
Up to [local] / sys / dev / usb