This source file includes following definitions.
- ide_tf_readback
- ide_tf_dump
- taskfile_lib_get_identify
- do_rw_taskfile
- task_no_data_intr
- wait_drive_not_busy
- ide_pio_bytes
- ide_pio_datablock
- ide_error_cmd
- ide_finish_cmd
- task_pio_intr
- pre_task_out_intr
- ide_raw_taskfile
- ide_no_data_taskfile
- ide_taskfile_ioctl
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12 #include <linux/types.h>
13 #include <linux/string.h>
14 #include <linux/kernel.h>
15 #include <linux/export.h>
16 #include <linux/sched.h>
17 #include <linux/interrupt.h>
18 #include <linux/errno.h>
19 #include <linux/slab.h>
20 #include <linux/delay.h>
21 #include <linux/hdreg.h>
22 #include <linux/ide.h>
23 #include <linux/nmi.h>
24 #include <linux/scatterlist.h>
25 #include <linux/uaccess.h>
26
27 #include <asm/io.h>
28
29 void ide_tf_readback(ide_drive_t *drive, struct ide_cmd *cmd)
30 {
31 ide_hwif_t *hwif = drive->hwif;
32 const struct ide_tp_ops *tp_ops = hwif->tp_ops;
33
34
35 tp_ops->write_devctl(hwif, ATA_DEVCTL_OBS);
36
37 tp_ops->tf_read(drive, &cmd->tf, cmd->valid.in.tf);
38
39 if (cmd->tf_flags & IDE_TFLAG_LBA48) {
40 tp_ops->write_devctl(hwif, ATA_HOB | ATA_DEVCTL_OBS);
41
42 tp_ops->tf_read(drive, &cmd->hob, cmd->valid.in.hob);
43 }
44 }
45
46 void ide_tf_dump(const char *s, struct ide_cmd *cmd)
47 {
48 #ifdef DEBUG
49 printk("%s: tf: feat 0x%02x nsect 0x%02x lbal 0x%02x "
50 "lbam 0x%02x lbah 0x%02x dev 0x%02x cmd 0x%02x\n",
51 s, cmd->tf.feature, cmd->tf.nsect,
52 cmd->tf.lbal, cmd->tf.lbam, cmd->tf.lbah,
53 cmd->tf.device, cmd->tf.command);
54 printk("%s: hob: nsect 0x%02x lbal 0x%02x lbam 0x%02x lbah 0x%02x\n",
55 s, cmd->hob.nsect, cmd->hob.lbal, cmd->hob.lbam, cmd->hob.lbah);
56 #endif
57 }
58
59 int taskfile_lib_get_identify(ide_drive_t *drive, u8 *buf)
60 {
61 struct ide_cmd cmd;
62
63 memset(&cmd, 0, sizeof(cmd));
64 cmd.tf.nsect = 0x01;
65 if (drive->media == ide_disk)
66 cmd.tf.command = ATA_CMD_ID_ATA;
67 else
68 cmd.tf.command = ATA_CMD_ID_ATAPI;
69 cmd.valid.out.tf = IDE_VALID_OUT_TF | IDE_VALID_DEVICE;
70 cmd.valid.in.tf = IDE_VALID_IN_TF | IDE_VALID_DEVICE;
71 cmd.protocol = ATA_PROT_PIO;
72
73 return ide_raw_taskfile(drive, &cmd, buf, 1);
74 }
75
76 static ide_startstop_t task_no_data_intr(ide_drive_t *);
77 static ide_startstop_t pre_task_out_intr(ide_drive_t *, struct ide_cmd *);
78 static ide_startstop_t task_pio_intr(ide_drive_t *);
79
80 ide_startstop_t do_rw_taskfile(ide_drive_t *drive, struct ide_cmd *orig_cmd)
81 {
82 ide_hwif_t *hwif = drive->hwif;
83 struct ide_cmd *cmd = &hwif->cmd;
84 struct ide_taskfile *tf = &cmd->tf;
85 ide_handler_t *handler = NULL;
86 const struct ide_tp_ops *tp_ops = hwif->tp_ops;
87 const struct ide_dma_ops *dma_ops = hwif->dma_ops;
88
89 if (orig_cmd->protocol == ATA_PROT_PIO &&
90 (orig_cmd->tf_flags & IDE_TFLAG_MULTI_PIO) &&
91 drive->mult_count == 0) {
92 pr_err("%s: multimode not set!\n", drive->name);
93 return ide_stopped;
94 }
95
96 if (orig_cmd->ftf_flags & IDE_FTFLAG_FLAGGED)
97 orig_cmd->ftf_flags |= IDE_FTFLAG_SET_IN_FLAGS;
98
99 memcpy(cmd, orig_cmd, sizeof(*cmd));
100
101 if ((cmd->tf_flags & IDE_TFLAG_DMA_PIO_FALLBACK) == 0) {
102 ide_tf_dump(drive->name, cmd);
103 tp_ops->write_devctl(hwif, ATA_DEVCTL_OBS);
104
105 if (cmd->ftf_flags & IDE_FTFLAG_OUT_DATA) {
106 u8 data[2] = { cmd->tf.data, cmd->hob.data };
107
108 tp_ops->output_data(drive, cmd, data, 2);
109 }
110
111 if (cmd->valid.out.tf & IDE_VALID_DEVICE) {
112 u8 HIHI = (cmd->tf_flags & IDE_TFLAG_LBA48) ?
113 0xE0 : 0xEF;
114
115 if (!(cmd->ftf_flags & IDE_FTFLAG_FLAGGED))
116 cmd->tf.device &= HIHI;
117 cmd->tf.device |= drive->select;
118 }
119
120 tp_ops->tf_load(drive, &cmd->hob, cmd->valid.out.hob);
121 tp_ops->tf_load(drive, &cmd->tf, cmd->valid.out.tf);
122 }
123
124 switch (cmd->protocol) {
125 case ATA_PROT_PIO:
126 if (cmd->tf_flags & IDE_TFLAG_WRITE) {
127 tp_ops->exec_command(hwif, tf->command);
128 ndelay(400);
129 return pre_task_out_intr(drive, cmd);
130 }
131 handler = task_pio_intr;
132
133 case ATA_PROT_NODATA:
134 if (handler == NULL)
135 handler = task_no_data_intr;
136 ide_execute_command(drive, cmd, handler, WAIT_WORSTCASE);
137 return ide_started;
138 case ATA_PROT_DMA:
139 if (ide_dma_prepare(drive, cmd))
140 return ide_stopped;
141 hwif->expiry = dma_ops->dma_timer_expiry;
142 ide_execute_command(drive, cmd, ide_dma_intr, 2 * WAIT_CMD);
143 dma_ops->dma_start(drive);
144
145 default:
146 return ide_started;
147 }
148 }
149 EXPORT_SYMBOL_GPL(do_rw_taskfile);
150
151 static ide_startstop_t task_no_data_intr(ide_drive_t *drive)
152 {
153 ide_hwif_t *hwif = drive->hwif;
154 struct ide_cmd *cmd = &hwif->cmd;
155 struct ide_taskfile *tf = &cmd->tf;
156 int custom = (cmd->tf_flags & IDE_TFLAG_CUSTOM_HANDLER) ? 1 : 0;
157 int retries = (custom && tf->command == ATA_CMD_INIT_DEV_PARAMS) ? 5 : 1;
158 u8 stat;
159
160 local_irq_enable_in_hardirq();
161
162 while (1) {
163 stat = hwif->tp_ops->read_status(hwif);
164 if ((stat & ATA_BUSY) == 0 || retries-- == 0)
165 break;
166 udelay(10);
167 };
168
169 if (!OK_STAT(stat, ATA_DRDY, BAD_STAT)) {
170 if (custom && tf->command == ATA_CMD_SET_MULTI) {
171 drive->mult_req = drive->mult_count = 0;
172 drive->special_flags |= IDE_SFLAG_RECALIBRATE;
173 (void)ide_dump_status(drive, __func__, stat);
174 return ide_stopped;
175 } else if (custom && tf->command == ATA_CMD_INIT_DEV_PARAMS) {
176 if ((stat & (ATA_ERR | ATA_DRQ)) == 0) {
177 ide_set_handler(drive, &task_no_data_intr,
178 WAIT_WORSTCASE);
179 return ide_started;
180 }
181 }
182 return ide_error(drive, "task_no_data_intr", stat);
183 }
184
185 if (custom && tf->command == ATA_CMD_SET_MULTI)
186 drive->mult_count = drive->mult_req;
187
188 if (custom == 0 || tf->command == ATA_CMD_IDLEIMMEDIATE ||
189 tf->command == ATA_CMD_CHK_POWER) {
190 struct request *rq = hwif->rq;
191
192 if (ata_pm_request(rq))
193 ide_complete_pm_rq(drive, rq);
194 else
195 ide_finish_cmd(drive, cmd, stat);
196 }
197
198 return ide_stopped;
199 }
200
201 static u8 wait_drive_not_busy(ide_drive_t *drive)
202 {
203 ide_hwif_t *hwif = drive->hwif;
204 int retries;
205 u8 stat;
206
207
208
209
210
211 for (retries = 0; retries < 1000; retries++) {
212 stat = hwif->tp_ops->read_status(hwif);
213
214 if (stat & ATA_BUSY)
215 udelay(10);
216 else
217 break;
218 }
219
220 if (stat & ATA_BUSY)
221 pr_err("%s: drive still BUSY!\n", drive->name);
222
223 return stat;
224 }
225
226 void ide_pio_bytes(ide_drive_t *drive, struct ide_cmd *cmd,
227 unsigned int write, unsigned int len)
228 {
229 ide_hwif_t *hwif = drive->hwif;
230 struct scatterlist *sg = hwif->sg_table;
231 struct scatterlist *cursg = cmd->cursg;
232 unsigned long uninitialized_var(flags);
233 struct page *page;
234 unsigned int offset;
235 u8 *buf;
236
237 if (cursg == NULL)
238 cursg = cmd->cursg = sg;
239
240 while (len) {
241 unsigned nr_bytes = min(len, cursg->length - cmd->cursg_ofs);
242
243 page = sg_page(cursg);
244 offset = cursg->offset + cmd->cursg_ofs;
245
246
247 page = nth_page(page, (offset >> PAGE_SHIFT));
248 offset %= PAGE_SIZE;
249
250 nr_bytes = min_t(unsigned, nr_bytes, (PAGE_SIZE - offset));
251
252 buf = kmap_atomic(page) + offset;
253
254 cmd->nleft -= nr_bytes;
255 cmd->cursg_ofs += nr_bytes;
256
257 if (cmd->cursg_ofs == cursg->length) {
258 cursg = cmd->cursg = sg_next(cmd->cursg);
259 cmd->cursg_ofs = 0;
260 }
261
262
263 if (write)
264 hwif->tp_ops->output_data(drive, cmd, buf, nr_bytes);
265 else
266 hwif->tp_ops->input_data(drive, cmd, buf, nr_bytes);
267
268 kunmap_atomic(buf);
269
270 len -= nr_bytes;
271 }
272 }
273 EXPORT_SYMBOL_GPL(ide_pio_bytes);
274
275 static void ide_pio_datablock(ide_drive_t *drive, struct ide_cmd *cmd,
276 unsigned int write)
277 {
278 unsigned int nr_bytes;
279
280 u8 saved_io_32bit = drive->io_32bit;
281
282 if (cmd->tf_flags & IDE_TFLAG_FS)
283 scsi_req(cmd->rq)->result = 0;
284
285 if (cmd->tf_flags & IDE_TFLAG_IO_16BIT)
286 drive->io_32bit = 0;
287
288 touch_softlockup_watchdog();
289
290 if (cmd->tf_flags & IDE_TFLAG_MULTI_PIO)
291 nr_bytes = min_t(unsigned, cmd->nleft, drive->mult_count << 9);
292 else
293 nr_bytes = SECTOR_SIZE;
294
295 ide_pio_bytes(drive, cmd, write, nr_bytes);
296
297 drive->io_32bit = saved_io_32bit;
298 }
299
300 static void ide_error_cmd(ide_drive_t *drive, struct ide_cmd *cmd)
301 {
302 if (cmd->tf_flags & IDE_TFLAG_FS) {
303 int nr_bytes = cmd->nbytes - cmd->nleft;
304
305 if (cmd->protocol == ATA_PROT_PIO &&
306 ((cmd->tf_flags & IDE_TFLAG_WRITE) || cmd->nleft == 0)) {
307 if (cmd->tf_flags & IDE_TFLAG_MULTI_PIO)
308 nr_bytes -= drive->mult_count << 9;
309 else
310 nr_bytes -= SECTOR_SIZE;
311 }
312
313 if (nr_bytes > 0)
314 ide_complete_rq(drive, BLK_STS_OK, nr_bytes);
315 }
316 }
317
318 void ide_finish_cmd(ide_drive_t *drive, struct ide_cmd *cmd, u8 stat)
319 {
320 struct request *rq = drive->hwif->rq;
321 u8 err = ide_read_error(drive), nsect = cmd->tf.nsect;
322 u8 set_xfer = !!(cmd->tf_flags & IDE_TFLAG_SET_XFER);
323
324 ide_complete_cmd(drive, cmd, stat, err);
325 scsi_req(rq)->result = err;
326
327 if (err == 0 && set_xfer) {
328 ide_set_xfer_rate(drive, nsect);
329 ide_driveid_update(drive);
330 }
331
332 ide_complete_rq(drive, err ? BLK_STS_IOERR : BLK_STS_OK, blk_rq_bytes(rq));
333 }
334
335
336
337
338 static ide_startstop_t task_pio_intr(ide_drive_t *drive)
339 {
340 ide_hwif_t *hwif = drive->hwif;
341 struct ide_cmd *cmd = &drive->hwif->cmd;
342 u8 stat = hwif->tp_ops->read_status(hwif);
343 u8 write = !!(cmd->tf_flags & IDE_TFLAG_WRITE);
344
345 if (write == 0) {
346
347 if (stat & ATA_ERR)
348 goto out_err;
349
350
351 if ((stat & ATA_DRQ) == 0) {
352
353 if (OK_STAT(stat, ATA_DRDY, ATA_BUSY))
354 goto out_end;
355
356
357 goto out_wait;
358 }
359 } else {
360 if (!OK_STAT(stat, DRIVE_READY, drive->bad_wstat))
361 goto out_err;
362
363
364 if (((stat & ATA_DRQ) == 0) ^ (cmd->nleft == 0))
365 goto out_err;
366 }
367
368 if (write && cmd->nleft == 0)
369 goto out_end;
370
371
372 ide_pio_datablock(drive, cmd, write);
373
374
375 if (write == 0 && cmd->nleft == 0) {
376 stat = wait_drive_not_busy(drive);
377 if (!OK_STAT(stat, 0, BAD_STAT))
378 goto out_err;
379
380 goto out_end;
381 }
382 out_wait:
383
384 ide_set_handler(drive, &task_pio_intr, WAIT_WORSTCASE);
385 return ide_started;
386 out_end:
387 if ((cmd->tf_flags & IDE_TFLAG_FS) == 0)
388 ide_finish_cmd(drive, cmd, stat);
389 else
390 ide_complete_rq(drive, BLK_STS_OK, blk_rq_sectors(cmd->rq) << 9);
391 return ide_stopped;
392 out_err:
393 ide_error_cmd(drive, cmd);
394 return ide_error(drive, __func__, stat);
395 }
396
397 static ide_startstop_t pre_task_out_intr(ide_drive_t *drive,
398 struct ide_cmd *cmd)
399 {
400 ide_startstop_t startstop;
401
402 if (ide_wait_stat(&startstop, drive, ATA_DRQ,
403 drive->bad_wstat, WAIT_DRQ)) {
404 pr_err("%s: no DRQ after issuing %sWRITE%s\n", drive->name,
405 (cmd->tf_flags & IDE_TFLAG_MULTI_PIO) ? "MULT" : "",
406 (drive->dev_flags & IDE_DFLAG_LBA48) ? "_EXT" : "");
407 return startstop;
408 }
409
410 if (!force_irqthreads && (drive->dev_flags & IDE_DFLAG_UNMASK) == 0)
411 local_irq_disable();
412
413 ide_set_handler(drive, &task_pio_intr, WAIT_WORSTCASE);
414
415 ide_pio_datablock(drive, cmd, 1);
416
417 return ide_started;
418 }
419
420 int ide_raw_taskfile(ide_drive_t *drive, struct ide_cmd *cmd, u8 *buf,
421 u16 nsect)
422 {
423 struct request *rq;
424 int error;
425
426 rq = blk_get_request(drive->queue,
427 (cmd->tf_flags & IDE_TFLAG_WRITE) ?
428 REQ_OP_DRV_OUT : REQ_OP_DRV_IN, 0);
429 ide_req(rq)->type = ATA_PRIV_TASKFILE;
430
431
432
433
434
435
436
437 if (nsect) {
438 error = blk_rq_map_kern(drive->queue, rq, buf,
439 nsect * SECTOR_SIZE, GFP_NOIO);
440 if (error)
441 goto put_req;
442 }
443
444 ide_req(rq)->special = cmd;
445 cmd->rq = rq;
446
447 blk_execute_rq(drive->queue, NULL, rq, 0);
448 error = scsi_req(rq)->result ? -EIO : 0;
449 put_req:
450 blk_put_request(rq);
451 return error;
452 }
453 EXPORT_SYMBOL(ide_raw_taskfile);
454
455 int ide_no_data_taskfile(ide_drive_t *drive, struct ide_cmd *cmd)
456 {
457 cmd->protocol = ATA_PROT_NODATA;
458
459 return ide_raw_taskfile(drive, cmd, NULL, 0);
460 }
461 EXPORT_SYMBOL_GPL(ide_no_data_taskfile);
462
463 #ifdef CONFIG_IDE_TASK_IOCTL
464 int ide_taskfile_ioctl(ide_drive_t *drive, unsigned long arg)
465 {
466 ide_task_request_t *req_task;
467 struct ide_cmd cmd;
468 u8 *outbuf = NULL;
469 u8 *inbuf = NULL;
470 u8 *data_buf = NULL;
471 int err = 0;
472 int tasksize = sizeof(struct ide_task_request_s);
473 unsigned int taskin = 0;
474 unsigned int taskout = 0;
475 u16 nsect = 0;
476 char __user *buf = (char __user *)arg;
477
478 req_task = memdup_user(buf, tasksize);
479 if (IS_ERR(req_task))
480 return PTR_ERR(req_task);
481
482 taskout = req_task->out_size;
483 taskin = req_task->in_size;
484
485 if (taskin > 65536 || taskout > 65536) {
486 err = -EINVAL;
487 goto abort;
488 }
489
490 if (taskout) {
491 int outtotal = tasksize;
492 outbuf = kzalloc(taskout, GFP_KERNEL);
493 if (outbuf == NULL) {
494 err = -ENOMEM;
495 goto abort;
496 }
497 if (copy_from_user(outbuf, buf + outtotal, taskout)) {
498 err = -EFAULT;
499 goto abort;
500 }
501 }
502
503 if (taskin) {
504 int intotal = tasksize + taskout;
505 inbuf = kzalloc(taskin, GFP_KERNEL);
506 if (inbuf == NULL) {
507 err = -ENOMEM;
508 goto abort;
509 }
510 if (copy_from_user(inbuf, buf + intotal, taskin)) {
511 err = -EFAULT;
512 goto abort;
513 }
514 }
515
516 memset(&cmd, 0, sizeof(cmd));
517
518 memcpy(&cmd.hob, req_task->hob_ports, HDIO_DRIVE_HOB_HDR_SIZE - 2);
519 memcpy(&cmd.tf, req_task->io_ports, HDIO_DRIVE_TASK_HDR_SIZE);
520
521 cmd.valid.out.tf = IDE_VALID_DEVICE;
522 cmd.valid.in.tf = IDE_VALID_DEVICE | IDE_VALID_IN_TF;
523 cmd.tf_flags = IDE_TFLAG_IO_16BIT;
524
525 if (drive->dev_flags & IDE_DFLAG_LBA48) {
526 cmd.tf_flags |= IDE_TFLAG_LBA48;
527 cmd.valid.in.hob = IDE_VALID_IN_HOB;
528 }
529
530 if (req_task->out_flags.all) {
531 cmd.ftf_flags |= IDE_FTFLAG_FLAGGED;
532
533 if (req_task->out_flags.b.data)
534 cmd.ftf_flags |= IDE_FTFLAG_OUT_DATA;
535
536 if (req_task->out_flags.b.nsector_hob)
537 cmd.valid.out.hob |= IDE_VALID_NSECT;
538 if (req_task->out_flags.b.sector_hob)
539 cmd.valid.out.hob |= IDE_VALID_LBAL;
540 if (req_task->out_flags.b.lcyl_hob)
541 cmd.valid.out.hob |= IDE_VALID_LBAM;
542 if (req_task->out_flags.b.hcyl_hob)
543 cmd.valid.out.hob |= IDE_VALID_LBAH;
544
545 if (req_task->out_flags.b.error_feature)
546 cmd.valid.out.tf |= IDE_VALID_FEATURE;
547 if (req_task->out_flags.b.nsector)
548 cmd.valid.out.tf |= IDE_VALID_NSECT;
549 if (req_task->out_flags.b.sector)
550 cmd.valid.out.tf |= IDE_VALID_LBAL;
551 if (req_task->out_flags.b.lcyl)
552 cmd.valid.out.tf |= IDE_VALID_LBAM;
553 if (req_task->out_flags.b.hcyl)
554 cmd.valid.out.tf |= IDE_VALID_LBAH;
555 } else {
556 cmd.valid.out.tf |= IDE_VALID_OUT_TF;
557 if (cmd.tf_flags & IDE_TFLAG_LBA48)
558 cmd.valid.out.hob |= IDE_VALID_OUT_HOB;
559 }
560
561 if (req_task->in_flags.b.data)
562 cmd.ftf_flags |= IDE_FTFLAG_IN_DATA;
563
564 if (req_task->req_cmd == IDE_DRIVE_TASK_RAW_WRITE) {
565
566 if (req_task->data_phase == TASKFILE_IN_DMAQ ||
567 req_task->data_phase == TASKFILE_IN_DMA)
568 cmd.tf_flags |= IDE_TFLAG_WRITE;
569 }
570
571 cmd.protocol = ATA_PROT_DMA;
572
573 switch (req_task->data_phase) {
574 case TASKFILE_MULTI_OUT:
575 if (!drive->mult_count) {
576
577 pr_err("%s: %s Multimode Write multcount is not set\n",
578 drive->name, __func__);
579 err = -EPERM;
580 goto abort;
581 }
582 cmd.tf_flags |= IDE_TFLAG_MULTI_PIO;
583
584 case TASKFILE_OUT:
585 cmd.protocol = ATA_PROT_PIO;
586
587 case TASKFILE_OUT_DMAQ:
588 case TASKFILE_OUT_DMA:
589 cmd.tf_flags |= IDE_TFLAG_WRITE;
590 nsect = taskout / SECTOR_SIZE;
591 data_buf = outbuf;
592 break;
593 case TASKFILE_MULTI_IN:
594 if (!drive->mult_count) {
595
596 pr_err("%s: %s Multimode Read multcount is not set\n",
597 drive->name, __func__);
598 err = -EPERM;
599 goto abort;
600 }
601 cmd.tf_flags |= IDE_TFLAG_MULTI_PIO;
602
603 case TASKFILE_IN:
604 cmd.protocol = ATA_PROT_PIO;
605
606 case TASKFILE_IN_DMAQ:
607 case TASKFILE_IN_DMA:
608 nsect = taskin / SECTOR_SIZE;
609 data_buf = inbuf;
610 break;
611 case TASKFILE_NO_DATA:
612 cmd.protocol = ATA_PROT_NODATA;
613 break;
614 default:
615 err = -EFAULT;
616 goto abort;
617 }
618
619 if (req_task->req_cmd == IDE_DRIVE_TASK_NO_DATA)
620 nsect = 0;
621 else if (!nsect) {
622 nsect = (cmd.hob.nsect << 8) | cmd.tf.nsect;
623
624 if (!nsect) {
625 pr_err("%s: in/out command without data\n",
626 drive->name);
627 err = -EFAULT;
628 goto abort;
629 }
630 }
631
632 err = ide_raw_taskfile(drive, &cmd, data_buf, nsect);
633
634 memcpy(req_task->hob_ports, &cmd.hob, HDIO_DRIVE_HOB_HDR_SIZE - 2);
635 memcpy(req_task->io_ports, &cmd.tf, HDIO_DRIVE_TASK_HDR_SIZE);
636
637 if ((cmd.ftf_flags & IDE_FTFLAG_SET_IN_FLAGS) &&
638 req_task->in_flags.all == 0) {
639 req_task->in_flags.all = IDE_TASKFILE_STD_IN_FLAGS;
640 if (drive->dev_flags & IDE_DFLAG_LBA48)
641 req_task->in_flags.all |= (IDE_HOB_STD_IN_FLAGS << 8);
642 }
643
644 if (copy_to_user(buf, req_task, tasksize)) {
645 err = -EFAULT;
646 goto abort;
647 }
648 if (taskout) {
649 int outtotal = tasksize;
650 if (copy_to_user(buf + outtotal, outbuf, taskout)) {
651 err = -EFAULT;
652 goto abort;
653 }
654 }
655 if (taskin) {
656 int intotal = tasksize + taskout;
657 if (copy_to_user(buf + intotal, inbuf, taskin)) {
658 err = -EFAULT;
659 goto abort;
660 }
661 }
662 abort:
663 kfree(req_task);
664 kfree(outbuf);
665 kfree(inbuf);
666
667 return err;
668 }
669 #endif