3 * Note that this is not the same as the USB Mass Storage driver
5 * Copyright Matthew Wilcox for Intel Corp, 2010
6 * Copyright Sarah Sharp for Intel Corp, 2010
8 * Distributed under the terms of the GNU GPL, version two.
11 #include <linux/blkdev.h>
12 #include <linux/slab.h>
13 #include <linux/types.h>
14 #include <linux/module.h>
15 #include <linux/usb.h>
16 #include <linux/usb/hcd.h>
17 #include <linux/usb/storage.h>
19 #include <scsi/scsi.h>
20 #include <scsi/scsi_dbg.h>
21 #include <scsi/scsi_cmnd.h>
22 #include <scsi/scsi_device.h>
23 #include <scsi/scsi_host.h>
24 #include <scsi/scsi_tcq.h>
26 /* Common header for all IUs */
36 IU_ID_RESPONSE = 0x04,
37 IU_ID_TASK_MGMT = 0x05,
38 IU_ID_READ_READY = 0x06,
39 IU_ID_WRITE_READY = 0x07,
51 __u8 cdb[16]; /* XXX: Overflow-checking tools may misunderstand */
55 * Also used for the Read Ready and Write Ready IUs since they have the
56 * same first four bytes
66 __u8 sense[SCSI_SENSE_BUFFERSIZE];
70 * The r00-r01c specs define this version of the SENSE IU data structure.
71 * It's still in use by several different firmware releases.
79 __u8 service_response;
80 __u8 sense[SCSI_SENSE_BUFFERSIZE];
96 struct usb_interface *intf;
97 struct usb_device *udev;
99 unsigned cmd_pipe, status_pipe, data_in_pipe, data_out_pipe;
100 unsigned use_streams:1;
101 unsigned uas_sense_old:1;
102 struct scsi_cmnd *cmnd;
103 struct urb *status_urb; /* used only if stream support is available */
107 ALLOC_STATUS_URB = (1 << 0),
108 SUBMIT_STATUS_URB = (1 << 1),
109 ALLOC_DATA_IN_URB = (1 << 2),
110 SUBMIT_DATA_IN_URB = (1 << 3),
111 ALLOC_DATA_OUT_URB = (1 << 4),
112 SUBMIT_DATA_OUT_URB = (1 << 5),
113 ALLOC_CMD_URB = (1 << 6),
114 SUBMIT_CMD_URB = (1 << 7),
117 /* Overrides scsi_pointer */
118 struct uas_cmd_info {
122 /* status_urb is used only if stream support isn't available */
123 struct urb *status_urb;
124 struct urb *data_in_urb;
125 struct urb *data_out_urb;
126 struct list_head list;
129 /* I hate forward declarations, but I actually have a loop */
130 static int uas_submit_urbs(struct scsi_cmnd *cmnd,
131 struct uas_dev_info *devinfo, gfp_t gfp);
132 static void uas_do_work(struct work_struct *work);
134 static DECLARE_WORK(uas_work, uas_do_work);
135 static DEFINE_SPINLOCK(uas_work_lock);
136 static LIST_HEAD(uas_work_list);
138 static void uas_do_work(struct work_struct *work)
140 struct uas_cmd_info *cmdinfo;
141 struct uas_cmd_info *temp;
142 struct list_head list;
145 spin_lock_irq(&uas_work_lock);
146 list_replace_init(&uas_work_list, &list);
147 spin_unlock_irq(&uas_work_lock);
149 list_for_each_entry_safe(cmdinfo, temp, &list, list) {
150 struct scsi_pointer *scp = (void *)cmdinfo;
151 struct scsi_cmnd *cmnd = container_of(scp,
152 struct scsi_cmnd, SCp);
153 err = uas_submit_urbs(cmnd, cmnd->device->hostdata, GFP_NOIO);
155 list_del(&cmdinfo->list);
156 spin_lock_irq(&uas_work_lock);
157 list_add_tail(&cmdinfo->list, &uas_work_list);
158 spin_unlock_irq(&uas_work_lock);
159 schedule_work(&uas_work);
164 static void uas_sense(struct urb *urb, struct scsi_cmnd *cmnd)
166 struct sense_iu *sense_iu = urb->transfer_buffer;
167 struct scsi_device *sdev = cmnd->device;
169 if (urb->actual_length > 16) {
170 unsigned len = be16_to_cpup(&sense_iu->len);
171 if (len + 16 != urb->actual_length) {
172 int newlen = min(len + 16, urb->actual_length) - 16;
175 sdev_printk(KERN_INFO, sdev, "%s: urb length %d "
176 "disagrees with IU sense data length %d, "
177 "using %d bytes of sense data\n", __func__,
178 urb->actual_length, len, newlen);
181 memcpy(cmnd->sense_buffer, sense_iu->sense, len);
184 cmnd->result = sense_iu->status;
185 cmnd->scsi_done(cmnd);
188 static void uas_sense_old(struct urb *urb, struct scsi_cmnd *cmnd)
190 struct sense_iu_old *sense_iu = urb->transfer_buffer;
191 struct scsi_device *sdev = cmnd->device;
193 if (urb->actual_length > 8) {
194 unsigned len = be16_to_cpup(&sense_iu->len) - 2;
195 if (len + 8 != urb->actual_length) {
196 int newlen = min(len + 8, urb->actual_length) - 8;
199 sdev_printk(KERN_INFO, sdev, "%s: urb length %d "
200 "disagrees with IU sense data length %d, "
201 "using %d bytes of sense data\n", __func__,
202 urb->actual_length, len, newlen);
205 memcpy(cmnd->sense_buffer, sense_iu->sense, len);
208 cmnd->result = sense_iu->status;
209 cmnd->scsi_done(cmnd);
212 static void uas_xfer_data(struct urb *urb, struct scsi_cmnd *cmnd,
215 struct uas_cmd_info *cmdinfo = (void *)&cmnd->SCp;
218 cmdinfo->state = direction;
219 err = uas_submit_urbs(cmnd, cmnd->device->hostdata, GFP_ATOMIC);
221 spin_lock(&uas_work_lock);
222 list_add_tail(&cmdinfo->list, &uas_work_list);
223 spin_unlock(&uas_work_lock);
224 schedule_work(&uas_work);
228 static void uas_stat_cmplt(struct urb *urb)
230 struct iu *iu = urb->transfer_buffer;
231 struct Scsi_Host *shost = urb->context;
232 struct uas_dev_info *devinfo = (void *)shost->hostdata[0];
233 struct scsi_cmnd *cmnd;
238 dev_err(&urb->dev->dev, "URB BAD STATUS %d\n", urb->status);
239 if (devinfo->use_streams)
244 tag = be16_to_cpup(&iu->tag) - 1;
246 cmnd = devinfo->cmnd;
248 cmnd = scsi_host_find_tag(shost, tag - 1);
250 if (devinfo->use_streams) {
254 ret = usb_submit_urb(urb, GFP_ATOMIC);
256 dev_err(&urb->dev->dev, "failed submit status urb\n");
262 if (devinfo->cmnd == cmnd)
263 devinfo->cmnd = NULL;
265 if (urb->actual_length < 16)
266 devinfo->uas_sense_old = 1;
267 if (devinfo->uas_sense_old)
268 uas_sense_old(urb, cmnd);
270 uas_sense(urb, cmnd);
272 case IU_ID_READ_READY:
273 uas_xfer_data(urb, cmnd, SUBMIT_DATA_IN_URB);
275 case IU_ID_WRITE_READY:
276 uas_xfer_data(urb, cmnd, SUBMIT_DATA_OUT_URB);
279 scmd_printk(KERN_ERR, cmnd,
280 "Bogus IU (%d) received on status pipe\n", iu->iu_id);
283 if (devinfo->use_streams) {
288 ret = usb_submit_urb(urb, GFP_ATOMIC);
290 dev_err(&urb->dev->dev, "failed submit status urb\n");
293 static void uas_data_cmplt(struct urb *urb)
295 struct scsi_data_buffer *sdb = urb->context;
296 sdb->resid = sdb->length - urb->actual_length;
300 static struct urb *uas_alloc_data_urb(struct uas_dev_info *devinfo, gfp_t gfp,
301 unsigned int pipe, u16 stream_id,
302 struct scsi_data_buffer *sdb,
303 enum dma_data_direction dir)
305 struct usb_device *udev = devinfo->udev;
306 struct urb *urb = usb_alloc_urb(0, gfp);
310 usb_fill_bulk_urb(urb, udev, pipe, NULL, sdb->length, uas_data_cmplt,
312 if (devinfo->use_streams)
313 urb->stream_id = stream_id;
314 urb->num_sgs = udev->bus->sg_tablesize ? sdb->table.nents : 0;
315 urb->sg = sdb->table.sgl;
320 static struct urb *uas_alloc_sense_urb(struct uas_dev_info *devinfo, gfp_t gfp,
321 struct Scsi_Host *shost, u16 stream_id)
323 struct usb_device *udev = devinfo->udev;
324 struct urb *urb = usb_alloc_urb(0, gfp);
330 iu = kzalloc(sizeof(*iu), gfp);
334 usb_fill_bulk_urb(urb, udev, devinfo->status_pipe, iu, sizeof(*iu),
335 uas_stat_cmplt, shost);
336 urb->stream_id = stream_id;
337 urb->transfer_flags |= URB_FREE_BUFFER;
345 static struct urb *uas_alloc_cmd_urb(struct uas_dev_info *devinfo, gfp_t gfp,
346 struct scsi_cmnd *cmnd, u16 stream_id)
348 struct usb_device *udev = devinfo->udev;
349 struct scsi_device *sdev = cmnd->device;
350 struct urb *urb = usb_alloc_urb(0, gfp);
351 struct command_iu *iu;
357 len = cmnd->cmd_len - 16;
361 iu = kzalloc(sizeof(*iu) + len, gfp);
365 iu->iu_id = IU_ID_COMMAND;
366 if (blk_rq_tagged(cmnd->request))
367 iu->tag = cpu_to_be16(cmnd->request->tag + 2);
369 iu->tag = cpu_to_be16(1);
370 iu->prio_attr = UAS_SIMPLE_TAG;
372 int_to_scsilun(sdev->lun, &iu->lun);
373 memcpy(iu->cdb, cmnd->cmnd, cmnd->cmd_len);
375 usb_fill_bulk_urb(urb, udev, devinfo->cmd_pipe, iu, sizeof(*iu) + len,
377 urb->transfer_flags |= URB_FREE_BUFFER;
386 * Why should I request the Status IU before sending the Command IU? Spec
387 * says to, but also says the device may receive them in any order. Seems
391 static int uas_submit_urbs(struct scsi_cmnd *cmnd,
392 struct uas_dev_info *devinfo, gfp_t gfp)
394 struct uas_cmd_info *cmdinfo = (void *)&cmnd->SCp;
396 if (cmdinfo->state & ALLOC_STATUS_URB) {
397 cmdinfo->status_urb = uas_alloc_sense_urb(devinfo, gfp,
398 cmnd->device->host, cmdinfo->stream);
399 if (!cmdinfo->status_urb)
400 return SCSI_MLQUEUE_DEVICE_BUSY;
401 cmdinfo->state &= ~ALLOC_STATUS_URB;
404 if (cmdinfo->state & SUBMIT_STATUS_URB) {
405 if (usb_submit_urb(cmdinfo->status_urb, gfp)) {
406 scmd_printk(KERN_INFO, cmnd,
407 "sense urb submission failure\n");
408 return SCSI_MLQUEUE_DEVICE_BUSY;
410 cmdinfo->state &= ~SUBMIT_STATUS_URB;
413 if (cmdinfo->state & ALLOC_DATA_IN_URB) {
414 cmdinfo->data_in_urb = uas_alloc_data_urb(devinfo, gfp,
415 devinfo->data_in_pipe, cmdinfo->stream,
416 scsi_in(cmnd), DMA_FROM_DEVICE);
417 if (!cmdinfo->data_in_urb)
418 return SCSI_MLQUEUE_DEVICE_BUSY;
419 cmdinfo->state &= ~ALLOC_DATA_IN_URB;
422 if (cmdinfo->state & SUBMIT_DATA_IN_URB) {
423 if (usb_submit_urb(cmdinfo->data_in_urb, gfp)) {
424 scmd_printk(KERN_INFO, cmnd,
425 "data in urb submission failure\n");
426 return SCSI_MLQUEUE_DEVICE_BUSY;
428 cmdinfo->state &= ~SUBMIT_DATA_IN_URB;
431 if (cmdinfo->state & ALLOC_DATA_OUT_URB) {
432 cmdinfo->data_out_urb = uas_alloc_data_urb(devinfo, gfp,
433 devinfo->data_out_pipe, cmdinfo->stream,
434 scsi_out(cmnd), DMA_TO_DEVICE);
435 if (!cmdinfo->data_out_urb)
436 return SCSI_MLQUEUE_DEVICE_BUSY;
437 cmdinfo->state &= ~ALLOC_DATA_OUT_URB;
440 if (cmdinfo->state & SUBMIT_DATA_OUT_URB) {
441 if (usb_submit_urb(cmdinfo->data_out_urb, gfp)) {
442 scmd_printk(KERN_INFO, cmnd,
443 "data out urb submission failure\n");
444 return SCSI_MLQUEUE_DEVICE_BUSY;
446 cmdinfo->state &= ~SUBMIT_DATA_OUT_URB;
449 if (cmdinfo->state & ALLOC_CMD_URB) {
450 cmdinfo->cmd_urb = uas_alloc_cmd_urb(devinfo, gfp, cmnd,
452 if (!cmdinfo->cmd_urb)
453 return SCSI_MLQUEUE_DEVICE_BUSY;
454 cmdinfo->state &= ~ALLOC_CMD_URB;
457 if (cmdinfo->state & SUBMIT_CMD_URB) {
458 if (usb_submit_urb(cmdinfo->cmd_urb, gfp)) {
459 scmd_printk(KERN_INFO, cmnd,
460 "cmd urb submission failure\n");
461 return SCSI_MLQUEUE_DEVICE_BUSY;
463 cmdinfo->state &= ~SUBMIT_CMD_URB;
469 static int uas_queuecommand_lck(struct scsi_cmnd *cmnd,
470 void (*done)(struct scsi_cmnd *))
472 struct scsi_device *sdev = cmnd->device;
473 struct uas_dev_info *devinfo = sdev->hostdata;
474 struct uas_cmd_info *cmdinfo = (void *)&cmnd->SCp;
477 BUILD_BUG_ON(sizeof(struct uas_cmd_info) > sizeof(struct scsi_pointer));
480 return SCSI_MLQUEUE_DEVICE_BUSY;
482 if (blk_rq_tagged(cmnd->request)) {
483 cmdinfo->stream = cmnd->request->tag + 2;
485 devinfo->cmnd = cmnd;
489 cmnd->scsi_done = done;
491 cmdinfo->state = ALLOC_STATUS_URB | SUBMIT_STATUS_URB |
492 ALLOC_CMD_URB | SUBMIT_CMD_URB;
494 switch (cmnd->sc_data_direction) {
495 case DMA_FROM_DEVICE:
496 cmdinfo->state |= ALLOC_DATA_IN_URB | SUBMIT_DATA_IN_URB;
498 case DMA_BIDIRECTIONAL:
499 cmdinfo->state |= ALLOC_DATA_IN_URB | SUBMIT_DATA_IN_URB;
501 cmdinfo->state |= ALLOC_DATA_OUT_URB | SUBMIT_DATA_OUT_URB;
506 if (!devinfo->use_streams) {
507 cmdinfo->state &= ~(SUBMIT_DATA_IN_URB | SUBMIT_DATA_OUT_URB |
508 ALLOC_STATUS_URB | SUBMIT_STATUS_URB);
512 err = uas_submit_urbs(cmnd, devinfo, GFP_ATOMIC);
514 /* If we did nothing, give up now */
515 if (cmdinfo->state & SUBMIT_STATUS_URB) {
516 usb_free_urb(cmdinfo->status_urb);
517 return SCSI_MLQUEUE_DEVICE_BUSY;
519 spin_lock(&uas_work_lock);
520 list_add_tail(&cmdinfo->list, &uas_work_list);
521 spin_unlock(&uas_work_lock);
522 schedule_work(&uas_work);
528 static DEF_SCSI_QCMD(uas_queuecommand)
530 static int uas_eh_abort_handler(struct scsi_cmnd *cmnd)
532 struct scsi_device *sdev = cmnd->device;
533 sdev_printk(KERN_INFO, sdev, "%s tag %d\n", __func__,
536 /* XXX: Send ABORT TASK Task Management command */
540 static int uas_eh_device_reset_handler(struct scsi_cmnd *cmnd)
542 struct scsi_device *sdev = cmnd->device;
543 sdev_printk(KERN_INFO, sdev, "%s tag %d\n", __func__,
546 /* XXX: Send LOGICAL UNIT RESET Task Management command */
550 static int uas_eh_target_reset_handler(struct scsi_cmnd *cmnd)
552 struct scsi_device *sdev = cmnd->device;
553 sdev_printk(KERN_INFO, sdev, "%s tag %d\n", __func__,
556 /* XXX: Can we reset just the one USB interface?
557 * Would calling usb_set_interface() have the right effect?
562 static int uas_eh_bus_reset_handler(struct scsi_cmnd *cmnd)
564 struct scsi_device *sdev = cmnd->device;
565 struct uas_dev_info *devinfo = sdev->hostdata;
566 struct usb_device *udev = devinfo->udev;
568 sdev_printk(KERN_INFO, sdev, "%s tag %d\n", __func__,
571 if (usb_reset_device(udev))
577 static int uas_slave_alloc(struct scsi_device *sdev)
579 sdev->hostdata = (void *)sdev->host->hostdata[0];
583 static int uas_slave_configure(struct scsi_device *sdev)
585 struct uas_dev_info *devinfo = sdev->hostdata;
586 scsi_set_tag_type(sdev, MSG_ORDERED_TAG);
587 scsi_activate_tcq(sdev, devinfo->qdepth - 2);
591 static struct scsi_host_template uas_host_template = {
592 .module = THIS_MODULE,
594 .queuecommand = uas_queuecommand,
595 .slave_alloc = uas_slave_alloc,
596 .slave_configure = uas_slave_configure,
597 .eh_abort_handler = uas_eh_abort_handler,
598 .eh_device_reset_handler = uas_eh_device_reset_handler,
599 .eh_target_reset_handler = uas_eh_target_reset_handler,
600 .eh_bus_reset_handler = uas_eh_bus_reset_handler,
601 .can_queue = 65536, /* Is there a limit on the _host_ ? */
603 .sg_tablesize = SG_NONE,
604 .cmd_per_lun = 1, /* until we override it */
605 .skip_settle_delay = 1,
609 static struct usb_device_id uas_usb_ids[] = {
610 { USB_INTERFACE_INFO(USB_CLASS_MASS_STORAGE, USB_SC_SCSI, USB_PR_BULK) },
611 { USB_INTERFACE_INFO(USB_CLASS_MASS_STORAGE, USB_SC_SCSI, USB_PR_UAS) },
612 /* 0xaa is a prototype device I happen to have access to */
613 { USB_INTERFACE_INFO(USB_CLASS_MASS_STORAGE, USB_SC_SCSI, 0xaa) },
616 MODULE_DEVICE_TABLE(usb, uas_usb_ids);
618 static int uas_is_interface(struct usb_host_interface *intf)
620 return (intf->desc.bInterfaceClass == USB_CLASS_MASS_STORAGE &&
621 intf->desc.bInterfaceSubClass == USB_SC_SCSI &&
622 intf->desc.bInterfaceProtocol == USB_PR_UAS);
625 static int uas_isnt_supported(struct usb_device *udev)
627 struct usb_hcd *hcd = bus_to_hcd(udev->bus);
629 dev_warn(&udev->dev, "The driver for the USB controller %s does not "
630 "support scatter-gather which is\n",
631 hcd->driver->description);
632 dev_warn(&udev->dev, "required by the UAS driver. Please try an"
633 "alternative USB controller if you wish to use UAS.\n");
637 static int uas_switch_interface(struct usb_device *udev,
638 struct usb_interface *intf)
641 int sg_supported = udev->bus->sg_tablesize != 0;
643 for (i = 0; i < intf->num_altsetting; i++) {
644 struct usb_host_interface *alt = &intf->altsetting[i];
646 if (uas_is_interface(alt)) {
648 return uas_isnt_supported(udev);
649 return usb_set_interface(udev,
650 alt->desc.bInterfaceNumber,
651 alt->desc.bAlternateSetting);
658 static void uas_configure_endpoints(struct uas_dev_info *devinfo)
660 struct usb_host_endpoint *eps[4] = { };
661 struct usb_interface *intf = devinfo->intf;
662 struct usb_device *udev = devinfo->udev;
663 struct usb_host_endpoint *endpoint = intf->cur_altsetting->endpoint;
664 unsigned i, n_endpoints = intf->cur_altsetting->desc.bNumEndpoints;
666 devinfo->uas_sense_old = 0;
667 devinfo->cmnd = NULL;
669 for (i = 0; i < n_endpoints; i++) {
670 unsigned char *extra = endpoint[i].extra;
671 int len = endpoint[i].extralen;
673 if (extra[1] == USB_DT_PIPE_USAGE) {
674 unsigned pipe_id = extra[2];
675 if (pipe_id > 0 && pipe_id < 5)
676 eps[pipe_id - 1] = &endpoint[i];
685 * Assume that if we didn't find a control pipe descriptor, we're
686 * using a device with old firmware that happens to be set up like
690 devinfo->cmd_pipe = usb_sndbulkpipe(udev, 1);
691 devinfo->status_pipe = usb_rcvbulkpipe(udev, 1);
692 devinfo->data_in_pipe = usb_rcvbulkpipe(udev, 2);
693 devinfo->data_out_pipe = usb_sndbulkpipe(udev, 2);
695 eps[1] = usb_pipe_endpoint(udev, devinfo->status_pipe);
696 eps[2] = usb_pipe_endpoint(udev, devinfo->data_in_pipe);
697 eps[3] = usb_pipe_endpoint(udev, devinfo->data_out_pipe);
699 devinfo->cmd_pipe = usb_sndbulkpipe(udev,
700 eps[0]->desc.bEndpointAddress);
701 devinfo->status_pipe = usb_rcvbulkpipe(udev,
702 eps[1]->desc.bEndpointAddress);
703 devinfo->data_in_pipe = usb_rcvbulkpipe(udev,
704 eps[2]->desc.bEndpointAddress);
705 devinfo->data_out_pipe = usb_sndbulkpipe(udev,
706 eps[3]->desc.bEndpointAddress);
709 devinfo->qdepth = usb_alloc_streams(devinfo->intf, eps + 1, 3, 256,
711 if (devinfo->qdepth < 0) {
712 devinfo->qdepth = 256;
713 devinfo->use_streams = 0;
715 devinfo->use_streams = 1;
719 static int uas_alloc_status_urb(struct uas_dev_info *devinfo,
720 struct Scsi_Host *shost)
722 if (devinfo->use_streams) {
723 devinfo->status_urb = NULL;
727 devinfo->status_urb = uas_alloc_sense_urb(devinfo, GFP_KERNEL,
729 if (!devinfo->status_urb)
732 if (usb_submit_urb(devinfo->status_urb, GFP_KERNEL))
737 usb_free_urb(devinfo->status_urb);
742 static void uas_free_streams(struct uas_dev_info *devinfo)
744 struct usb_device *udev = devinfo->udev;
745 struct usb_host_endpoint *eps[3];
747 eps[0] = usb_pipe_endpoint(udev, devinfo->status_pipe);
748 eps[1] = usb_pipe_endpoint(udev, devinfo->data_in_pipe);
749 eps[2] = usb_pipe_endpoint(udev, devinfo->data_out_pipe);
750 usb_free_streams(devinfo->intf, eps, 3, GFP_KERNEL);
754 * XXX: What I'd like to do here is register a SCSI host for each USB host in
755 * the system. Follow usb-storage's design of registering a SCSI host for
756 * each USB device for the moment. Can implement this by walking up the
757 * USB hierarchy until we find a USB host.
759 static int uas_probe(struct usb_interface *intf, const struct usb_device_id *id)
762 struct Scsi_Host *shost;
763 struct uas_dev_info *devinfo;
764 struct usb_device *udev = interface_to_usbdev(intf);
766 if (uas_switch_interface(udev, intf))
769 devinfo = kmalloc(sizeof(struct uas_dev_info), GFP_KERNEL);
774 shost = scsi_host_alloc(&uas_host_template, sizeof(void *));
778 shost->max_cmd_len = 16 + 252;
780 shost->sg_tablesize = udev->bus->sg_tablesize;
782 devinfo->intf = intf;
783 devinfo->udev = udev;
784 uas_configure_endpoints(devinfo);
786 result = scsi_init_shared_tag_map(shost, devinfo->qdepth - 2);
790 result = scsi_add_host(shost, &intf->dev);
794 shost->hostdata[0] = (unsigned long)devinfo;
796 result = uas_alloc_status_urb(devinfo, shost);
798 goto err_alloc_status;
800 scsi_scan_host(shost);
801 usb_set_intfdata(intf, shost);
805 scsi_remove_host(shost);
808 uas_free_streams(devinfo);
812 scsi_host_put(shost);
816 static int uas_pre_reset(struct usb_interface *intf)
818 /* XXX: Need to return 1 if it's not our device in error handling */
822 static int uas_post_reset(struct usb_interface *intf)
824 /* XXX: Need to return 1 if it's not our device in error handling */
828 static void uas_disconnect(struct usb_interface *intf)
830 struct Scsi_Host *shost = usb_get_intfdata(intf);
831 struct uas_dev_info *devinfo = (void *)shost->hostdata[0];
833 scsi_remove_host(shost);
834 usb_kill_urb(devinfo->status_urb);
835 usb_free_urb(devinfo->status_urb);
836 uas_free_streams(devinfo);
841 * XXX: Should this plug into libusual so we can auto-upgrade devices from
844 static struct usb_driver uas_driver = {
847 .disconnect = uas_disconnect,
848 .pre_reset = uas_pre_reset,
849 .post_reset = uas_post_reset,
850 .id_table = uas_usb_ids,
853 static int uas_init(void)
855 return usb_register(&uas_driver);
858 static void uas_exit(void)
860 usb_deregister(&uas_driver);
863 module_init(uas_init);
864 module_exit(uas_exit);
866 MODULE_LICENSE("GPL");
867 MODULE_AUTHOR("Matthew Wilcox and Sarah Sharp");