Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris...
[linux/fpc-iii.git] / drivers / misc / mei / amthif.c
blob2fad8443282913f65601c408bc37a2e9f990efdf
1 /*
3 * Intel Management Engine Interface (Intel MEI) Linux driver
4 * Copyright (c) 2003-2012, Intel Corporation.
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms and conditions of the GNU General Public License,
8 * version 2, as published by the Free Software Foundation.
10 * This program is distributed in the hope it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
13 * more details.
17 #include <linux/kernel.h>
18 #include <linux/fs.h>
19 #include <linux/errno.h>
20 #include <linux/types.h>
21 #include <linux/fcntl.h>
22 #include <linux/aio.h>
23 #include <linux/pci.h>
24 #include <linux/init.h>
25 #include <linux/ioctl.h>
26 #include <linux/cdev.h>
27 #include <linux/list.h>
28 #include <linux/delay.h>
29 #include <linux/sched.h>
30 #include <linux/uuid.h>
31 #include <linux/jiffies.h>
32 #include <linux/uaccess.h>
34 #include <linux/mei.h>
36 #include "mei_dev.h"
37 #include "hbm.h"
38 #include "hw-me.h"
39 #include "client.h"
41 const uuid_le mei_amthif_guid = UUID_LE(0x12f80028, 0xb4b7, 0x4b2d,
42 0xac, 0xa8, 0x46, 0xe0,
43 0xff, 0x65, 0x81, 0x4c);
45 /**
46 * mei_amthif_reset_params - initializes mei device iamthif
48 * @dev: the device structure
50 void mei_amthif_reset_params(struct mei_device *dev)
52 /* reset iamthif parameters. */
53 dev->iamthif_current_cb = NULL;
54 dev->iamthif_msg_buf_size = 0;
55 dev->iamthif_msg_buf_index = 0;
56 dev->iamthif_canceled = false;
57 dev->iamthif_ioctl = false;
58 dev->iamthif_state = MEI_IAMTHIF_IDLE;
59 dev->iamthif_timer = 0;
60 dev->iamthif_stall_timer = 0;
61 dev->iamthif_open_count = 0;
64 /**
65 * mei_amthif_host_init - mei initialization amthif client.
67 * @dev: the device structure
70 int mei_amthif_host_init(struct mei_device *dev)
72 struct mei_cl *cl = &dev->iamthif_cl;
73 unsigned char *msg_buf;
74 int ret, i;
76 dev->iamthif_state = MEI_IAMTHIF_IDLE;
78 mei_cl_init(cl, dev);
80 i = mei_me_cl_by_uuid(dev, &mei_amthif_guid);
81 if (i < 0) {
82 ret = i;
83 dev_info(&dev->pdev->dev,
84 "amthif: failed to find the client %d\n", ret);
85 return ret;
88 cl->me_client_id = dev->me_clients[i].client_id;
90 /* Assign iamthif_mtu to the value received from ME */
92 dev->iamthif_mtu = dev->me_clients[i].props.max_msg_length;
93 dev_dbg(&dev->pdev->dev, "IAMTHIF_MTU = %d\n",
94 dev->me_clients[i].props.max_msg_length);
96 kfree(dev->iamthif_msg_buf);
97 dev->iamthif_msg_buf = NULL;
99 /* allocate storage for ME message buffer */
100 msg_buf = kcalloc(dev->iamthif_mtu,
101 sizeof(unsigned char), GFP_KERNEL);
102 if (!msg_buf) {
103 dev_err(&dev->pdev->dev, "amthif: memory allocation for ME message buffer failed.\n");
104 return -ENOMEM;
107 dev->iamthif_msg_buf = msg_buf;
109 ret = mei_cl_link(cl, MEI_IAMTHIF_HOST_CLIENT_ID);
111 if (ret < 0) {
112 dev_err(&dev->pdev->dev,
113 "amthif: failed link client %d\n", ret);
114 return ret;
117 cl->state = MEI_FILE_CONNECTING;
119 if (mei_hbm_cl_connect_req(dev, cl)) {
120 dev_dbg(&dev->pdev->dev, "amthif: Failed to connect to ME client\n");
121 cl->state = MEI_FILE_DISCONNECTED;
122 cl->host_client_id = 0;
123 } else {
124 cl->timer_count = MEI_CONNECT_TIMEOUT;
126 return 0;
130 * mei_amthif_find_read_list_entry - finds a amthilist entry for current file
132 * @dev: the device structure
133 * @file: pointer to file object
135 * returns returned a list entry on success, NULL on failure.
137 struct mei_cl_cb *mei_amthif_find_read_list_entry(struct mei_device *dev,
138 struct file *file)
140 struct mei_cl_cb *pos = NULL;
141 struct mei_cl_cb *next = NULL;
143 list_for_each_entry_safe(pos, next,
144 &dev->amthif_rd_complete_list.list, list) {
145 if (pos->cl && pos->cl == &dev->iamthif_cl &&
146 pos->file_object == file)
147 return pos;
149 return NULL;
154 * mei_amthif_read - read data from AMTHIF client
156 * @dev: the device structure
157 * @if_num: minor number
158 * @file: pointer to file object
159 * @*ubuf: pointer to user data in user space
160 * @length: data length to read
161 * @offset: data read offset
163 * Locking: called under "dev->device_lock" lock
165 * returns
166 * returned data length on success,
167 * zero if no data to read,
168 * negative on failure.
170 int mei_amthif_read(struct mei_device *dev, struct file *file,
171 char __user *ubuf, size_t length, loff_t *offset)
173 int rets;
174 int wait_ret;
175 struct mei_cl_cb *cb = NULL;
176 struct mei_cl *cl = file->private_data;
177 unsigned long timeout;
178 int i;
180 /* Only possible if we are in timeout */
181 if (!cl || cl != &dev->iamthif_cl) {
182 dev_dbg(&dev->pdev->dev, "bad file ext.\n");
183 return -ETIMEDOUT;
186 i = mei_me_cl_by_id(dev, dev->iamthif_cl.me_client_id);
188 if (i < 0) {
189 dev_dbg(&dev->pdev->dev, "amthif client not found.\n");
190 return -ENODEV;
192 dev_dbg(&dev->pdev->dev, "checking amthif data\n");
193 cb = mei_amthif_find_read_list_entry(dev, file);
195 /* Check for if we can block or not*/
196 if (cb == NULL && file->f_flags & O_NONBLOCK)
197 return -EAGAIN;
200 dev_dbg(&dev->pdev->dev, "waiting for amthif data\n");
201 while (cb == NULL) {
202 /* unlock the Mutex */
203 mutex_unlock(&dev->device_lock);
205 wait_ret = wait_event_interruptible(dev->iamthif_cl.wait,
206 (cb = mei_amthif_find_read_list_entry(dev, file)));
208 /* Locking again the Mutex */
209 mutex_lock(&dev->device_lock);
211 if (wait_ret)
212 return -ERESTARTSYS;
214 dev_dbg(&dev->pdev->dev, "woke up from sleep\n");
218 dev_dbg(&dev->pdev->dev, "Got amthif data\n");
219 dev->iamthif_timer = 0;
221 if (cb) {
222 timeout = cb->read_time +
223 mei_secs_to_jiffies(MEI_IAMTHIF_READ_TIMER);
224 dev_dbg(&dev->pdev->dev, "amthif timeout = %lud\n",
225 timeout);
227 if (time_after(jiffies, timeout)) {
228 dev_dbg(&dev->pdev->dev, "amthif Time out\n");
229 /* 15 sec for the message has expired */
230 list_del(&cb->list);
231 rets = -ETIMEDOUT;
232 goto free;
235 /* if the whole message will fit remove it from the list */
236 if (cb->buf_idx >= *offset && length >= (cb->buf_idx - *offset))
237 list_del(&cb->list);
238 else if (cb->buf_idx > 0 && cb->buf_idx <= *offset) {
239 /* end of the message has been reached */
240 list_del(&cb->list);
241 rets = 0;
242 goto free;
244 /* else means that not full buffer will be read and do not
245 * remove message from deletion list
248 dev_dbg(&dev->pdev->dev, "amthif cb->response_buffer size - %d\n",
249 cb->response_buffer.size);
250 dev_dbg(&dev->pdev->dev, "amthif cb->buf_idx - %lu\n", cb->buf_idx);
252 /* length is being truncated to PAGE_SIZE, however,
253 * the buf_idx may point beyond */
254 length = min_t(size_t, length, (cb->buf_idx - *offset));
256 if (copy_to_user(ubuf, cb->response_buffer.data + *offset, length))
257 rets = -EFAULT;
258 else {
259 rets = length;
260 if ((*offset + length) < cb->buf_idx) {
261 *offset += length;
262 goto out;
265 free:
266 dev_dbg(&dev->pdev->dev, "free amthif cb memory.\n");
267 *offset = 0;
268 mei_io_cb_free(cb);
269 out:
270 return rets;
274 * mei_amthif_send_cmd - send amthif command to the ME
276 * @dev: the device structure
277 * @cb: mei call back struct
279 * returns 0 on success, <0 on failure.
282 static int mei_amthif_send_cmd(struct mei_device *dev, struct mei_cl_cb *cb)
284 struct mei_msg_hdr mei_hdr;
285 int ret;
287 if (!dev || !cb)
288 return -ENODEV;
290 dev_dbg(&dev->pdev->dev, "write data to amthif client.\n");
292 dev->iamthif_state = MEI_IAMTHIF_WRITING;
293 dev->iamthif_current_cb = cb;
294 dev->iamthif_file_object = cb->file_object;
295 dev->iamthif_canceled = false;
296 dev->iamthif_ioctl = true;
297 dev->iamthif_msg_buf_size = cb->request_buffer.size;
298 memcpy(dev->iamthif_msg_buf, cb->request_buffer.data,
299 cb->request_buffer.size);
301 ret = mei_cl_flow_ctrl_creds(&dev->iamthif_cl);
302 if (ret < 0)
303 return ret;
305 if (ret && dev->hbuf_is_ready) {
306 ret = 0;
307 dev->hbuf_is_ready = false;
308 if (cb->request_buffer.size > mei_hbuf_max_len(dev)) {
309 mei_hdr.length = mei_hbuf_max_len(dev);
310 mei_hdr.msg_complete = 0;
311 } else {
312 mei_hdr.length = cb->request_buffer.size;
313 mei_hdr.msg_complete = 1;
316 mei_hdr.host_addr = dev->iamthif_cl.host_client_id;
317 mei_hdr.me_addr = dev->iamthif_cl.me_client_id;
318 mei_hdr.reserved = 0;
319 mei_hdr.internal = 0;
320 dev->iamthif_msg_buf_index += mei_hdr.length;
321 ret = mei_write_message(dev, &mei_hdr, dev->iamthif_msg_buf);
322 if (ret)
323 return ret;
325 if (mei_hdr.msg_complete) {
326 if (mei_cl_flow_ctrl_reduce(&dev->iamthif_cl))
327 return -EIO;
328 dev->iamthif_flow_control_pending = true;
329 dev->iamthif_state = MEI_IAMTHIF_FLOW_CONTROL;
330 dev_dbg(&dev->pdev->dev, "add amthif cb to write waiting list\n");
331 dev->iamthif_current_cb = cb;
332 dev->iamthif_file_object = cb->file_object;
333 list_add_tail(&cb->list, &dev->write_waiting_list.list);
334 } else {
335 dev_dbg(&dev->pdev->dev, "message does not complete, so add amthif cb to write list.\n");
336 list_add_tail(&cb->list, &dev->write_list.list);
338 } else {
339 if (!dev->hbuf_is_ready)
340 dev_dbg(&dev->pdev->dev, "host buffer is not empty");
342 dev_dbg(&dev->pdev->dev, "No flow control credentials, so add iamthif cb to write list.\n");
343 list_add_tail(&cb->list, &dev->write_list.list);
345 return 0;
349 * mei_amthif_write - write amthif data to amthif client
351 * @dev: the device structure
352 * @cb: mei call back struct
354 * returns 0 on success, <0 on failure.
357 int mei_amthif_write(struct mei_device *dev, struct mei_cl_cb *cb)
359 int ret;
361 if (!dev || !cb)
362 return -ENODEV;
364 ret = mei_io_cb_alloc_resp_buf(cb, dev->iamthif_mtu);
365 if (ret)
366 return ret;
368 cb->fop_type = MEI_FOP_IOCTL;
370 if (!list_empty(&dev->amthif_cmd_list.list) ||
371 dev->iamthif_state != MEI_IAMTHIF_IDLE) {
372 dev_dbg(&dev->pdev->dev,
373 "amthif state = %d\n", dev->iamthif_state);
374 dev_dbg(&dev->pdev->dev, "AMTHIF: add cb to the wait list\n");
375 list_add_tail(&cb->list, &dev->amthif_cmd_list.list);
376 return 0;
378 return mei_amthif_send_cmd(dev, cb);
381 * mei_amthif_run_next_cmd
383 * @dev: the device structure
385 * returns 0 on success, <0 on failure.
387 void mei_amthif_run_next_cmd(struct mei_device *dev)
389 struct mei_cl_cb *pos = NULL;
390 struct mei_cl_cb *next = NULL;
391 int status;
393 if (!dev)
394 return;
396 dev->iamthif_msg_buf_size = 0;
397 dev->iamthif_msg_buf_index = 0;
398 dev->iamthif_canceled = false;
399 dev->iamthif_ioctl = true;
400 dev->iamthif_state = MEI_IAMTHIF_IDLE;
401 dev->iamthif_timer = 0;
402 dev->iamthif_file_object = NULL;
404 dev_dbg(&dev->pdev->dev, "complete amthif cmd_list cb.\n");
406 list_for_each_entry_safe(pos, next, &dev->amthif_cmd_list.list, list) {
407 list_del(&pos->list);
409 if (pos->cl && pos->cl == &dev->iamthif_cl) {
410 status = mei_amthif_send_cmd(dev, pos);
411 if (status) {
412 dev_dbg(&dev->pdev->dev,
413 "amthif write failed status = %d\n",
414 status);
415 return;
417 break;
423 unsigned int mei_amthif_poll(struct mei_device *dev,
424 struct file *file, poll_table *wait)
426 unsigned int mask = 0;
428 poll_wait(file, &dev->iamthif_cl.wait, wait);
430 mutex_lock(&dev->device_lock);
431 if (!mei_cl_is_connected(&dev->iamthif_cl)) {
433 mask = POLLERR;
435 } else if (dev->iamthif_state == MEI_IAMTHIF_READ_COMPLETE &&
436 dev->iamthif_file_object == file) {
438 mask |= (POLLIN | POLLRDNORM);
439 dev_dbg(&dev->pdev->dev, "run next amthif cb\n");
440 mei_amthif_run_next_cmd(dev);
442 mutex_unlock(&dev->device_lock);
444 return mask;
450 * mei_amthif_irq_write_completed - processes completed iamthif operation.
452 * @dev: the device structure.
453 * @slots: free slots.
454 * @cb_pos: callback block.
455 * @cl: private data of the file object.
456 * @cmpl_list: complete list.
458 * returns 0, OK; otherwise, error.
460 int mei_amthif_irq_write_complete(struct mei_cl *cl, struct mei_cl_cb *cb,
461 s32 *slots, struct mei_cl_cb *cmpl_list)
463 struct mei_device *dev = cl->dev;
464 struct mei_msg_hdr mei_hdr;
465 size_t len = dev->iamthif_msg_buf_size - dev->iamthif_msg_buf_index;
466 u32 msg_slots = mei_data2slots(len);
467 int rets;
469 rets = mei_cl_flow_ctrl_creds(cl);
470 if (rets < 0)
471 return rets;
473 if (rets == 0) {
474 cl_dbg(dev, cl, "No flow control credentials: not sending.\n");
475 return 0;
478 mei_hdr.host_addr = cl->host_client_id;
479 mei_hdr.me_addr = cl->me_client_id;
480 mei_hdr.reserved = 0;
481 mei_hdr.internal = 0;
483 if (*slots >= msg_slots) {
484 mei_hdr.length = len;
485 mei_hdr.msg_complete = 1;
486 /* Split the message only if we can write the whole host buffer */
487 } else if (*slots == dev->hbuf_depth) {
488 msg_slots = *slots;
489 len = (*slots * sizeof(u32)) - sizeof(struct mei_msg_hdr);
490 mei_hdr.length = len;
491 mei_hdr.msg_complete = 0;
492 } else {
493 /* wait for next time the host buffer is empty */
494 return 0;
497 dev_dbg(&dev->pdev->dev, MEI_HDR_FMT, MEI_HDR_PRM(&mei_hdr));
499 *slots -= msg_slots;
500 rets = mei_write_message(dev, &mei_hdr,
501 dev->iamthif_msg_buf + dev->iamthif_msg_buf_index);
502 if (rets) {
503 dev->iamthif_state = MEI_IAMTHIF_IDLE;
504 cl->status = rets;
505 list_del(&cb->list);
506 return rets;
509 if (mei_cl_flow_ctrl_reduce(cl))
510 return -EIO;
512 dev->iamthif_msg_buf_index += mei_hdr.length;
513 cl->status = 0;
515 if (mei_hdr.msg_complete) {
516 dev->iamthif_state = MEI_IAMTHIF_FLOW_CONTROL;
517 dev->iamthif_flow_control_pending = true;
519 /* save iamthif cb sent to amthif client */
520 cb->buf_idx = dev->iamthif_msg_buf_index;
521 dev->iamthif_current_cb = cb;
523 list_move_tail(&cb->list, &dev->write_waiting_list.list);
527 return 0;
531 * mei_amthif_irq_read_message - read routine after ISR to
532 * handle the read amthif message
534 * @dev: the device structure
535 * @mei_hdr: header of amthif message
536 * @complete_list: An instance of our list structure
538 * returns 0 on success, <0 on failure.
540 int mei_amthif_irq_read_msg(struct mei_device *dev,
541 struct mei_msg_hdr *mei_hdr,
542 struct mei_cl_cb *complete_list)
544 struct mei_cl_cb *cb;
545 unsigned char *buffer;
547 BUG_ON(mei_hdr->me_addr != dev->iamthif_cl.me_client_id);
548 BUG_ON(dev->iamthif_state != MEI_IAMTHIF_READING);
550 buffer = dev->iamthif_msg_buf + dev->iamthif_msg_buf_index;
551 BUG_ON(dev->iamthif_mtu < dev->iamthif_msg_buf_index + mei_hdr->length);
553 mei_read_slots(dev, buffer, mei_hdr->length);
555 dev->iamthif_msg_buf_index += mei_hdr->length;
557 if (!mei_hdr->msg_complete)
558 return 0;
560 dev_dbg(&dev->pdev->dev, "amthif_message_buffer_index =%d\n",
561 mei_hdr->length);
563 dev_dbg(&dev->pdev->dev, "completed amthif read.\n ");
564 if (!dev->iamthif_current_cb)
565 return -ENODEV;
567 cb = dev->iamthif_current_cb;
568 dev->iamthif_current_cb = NULL;
570 if (!cb->cl)
571 return -ENODEV;
573 dev->iamthif_stall_timer = 0;
574 cb->buf_idx = dev->iamthif_msg_buf_index;
575 cb->read_time = jiffies;
576 if (dev->iamthif_ioctl && cb->cl == &dev->iamthif_cl) {
577 /* found the iamthif cb */
578 dev_dbg(&dev->pdev->dev, "complete the amthif read cb.\n ");
579 dev_dbg(&dev->pdev->dev, "add the amthif read cb to complete.\n ");
580 list_add_tail(&cb->list, &complete_list->list);
582 return 0;
586 * mei_amthif_irq_read - prepares to read amthif data.
588 * @dev: the device structure.
589 * @slots: free slots.
591 * returns 0, OK; otherwise, error.
593 int mei_amthif_irq_read(struct mei_device *dev, s32 *slots)
595 u32 msg_slots = mei_data2slots(sizeof(struct hbm_flow_control));
597 if (*slots < msg_slots)
598 return -EMSGSIZE;
600 *slots -= msg_slots;
602 if (mei_hbm_cl_flow_control_req(dev, &dev->iamthif_cl)) {
603 dev_dbg(&dev->pdev->dev, "iamthif flow control failed\n");
604 return -EIO;
607 dev_dbg(&dev->pdev->dev, "iamthif flow control success\n");
608 dev->iamthif_state = MEI_IAMTHIF_READING;
609 dev->iamthif_flow_control_pending = false;
610 dev->iamthif_msg_buf_index = 0;
611 dev->iamthif_msg_buf_size = 0;
612 dev->iamthif_stall_timer = MEI_IAMTHIF_STALL_TIMER;
613 dev->hbuf_is_ready = mei_hbuf_is_ready(dev);
614 return 0;
618 * mei_amthif_complete - complete amthif callback.
620 * @dev: the device structure.
621 * @cb_pos: callback block.
623 void mei_amthif_complete(struct mei_device *dev, struct mei_cl_cb *cb)
625 if (dev->iamthif_canceled != 1) {
626 dev->iamthif_state = MEI_IAMTHIF_READ_COMPLETE;
627 dev->iamthif_stall_timer = 0;
628 memcpy(cb->response_buffer.data,
629 dev->iamthif_msg_buf,
630 dev->iamthif_msg_buf_index);
631 list_add_tail(&cb->list, &dev->amthif_rd_complete_list.list);
632 dev_dbg(&dev->pdev->dev, "amthif read completed\n");
633 dev->iamthif_timer = jiffies;
634 dev_dbg(&dev->pdev->dev, "dev->iamthif_timer = %ld\n",
635 dev->iamthif_timer);
636 } else {
637 mei_amthif_run_next_cmd(dev);
640 dev_dbg(&dev->pdev->dev, "completing amthif call back.\n");
641 wake_up_interruptible(&dev->iamthif_cl.wait);
645 * mei_clear_list - removes all callbacks associated with file
646 * from mei_cb_list
648 * @dev: device structure.
649 * @file: file structure
650 * @mei_cb_list: callbacks list
652 * mei_clear_list is called to clear resources associated with file
653 * when application calls close function or Ctrl-C was pressed
655 * returns true if callback removed from the list, false otherwise
657 static bool mei_clear_list(struct mei_device *dev,
658 const struct file *file, struct list_head *mei_cb_list)
660 struct mei_cl_cb *cb_pos = NULL;
661 struct mei_cl_cb *cb_next = NULL;
662 bool removed = false;
664 /* list all list member */
665 list_for_each_entry_safe(cb_pos, cb_next, mei_cb_list, list) {
666 /* check if list member associated with a file */
667 if (file == cb_pos->file_object) {
668 /* remove member from the list */
669 list_del(&cb_pos->list);
670 /* check if cb equal to current iamthif cb */
671 if (dev->iamthif_current_cb == cb_pos) {
672 dev->iamthif_current_cb = NULL;
673 /* send flow control to iamthif client */
674 mei_hbm_cl_flow_control_req(dev,
675 &dev->iamthif_cl);
677 /* free all allocated buffers */
678 mei_io_cb_free(cb_pos);
679 cb_pos = NULL;
680 removed = true;
683 return removed;
687 * mei_clear_lists - removes all callbacks associated with file
689 * @dev: device structure
690 * @file: file structure
692 * mei_clear_lists is called to clear resources associated with file
693 * when application calls close function or Ctrl-C was pressed
695 * returns true if callback removed from the list, false otherwise
697 static bool mei_clear_lists(struct mei_device *dev, struct file *file)
699 bool removed = false;
701 /* remove callbacks associated with a file */
702 mei_clear_list(dev, file, &dev->amthif_cmd_list.list);
703 if (mei_clear_list(dev, file, &dev->amthif_rd_complete_list.list))
704 removed = true;
706 mei_clear_list(dev, file, &dev->ctrl_rd_list.list);
708 if (mei_clear_list(dev, file, &dev->ctrl_wr_list.list))
709 removed = true;
711 if (mei_clear_list(dev, file, &dev->write_waiting_list.list))
712 removed = true;
714 if (mei_clear_list(dev, file, &dev->write_list.list))
715 removed = true;
717 /* check if iamthif_current_cb not NULL */
718 if (dev->iamthif_current_cb && !removed) {
719 /* check file and iamthif current cb association */
720 if (dev->iamthif_current_cb->file_object == file) {
721 /* remove cb */
722 mei_io_cb_free(dev->iamthif_current_cb);
723 dev->iamthif_current_cb = NULL;
724 removed = true;
727 return removed;
731 * mei_amthif_release - the release function
733 * @dev: device structure
734 * @file: pointer to file structure
736 * returns 0 on success, <0 on error
738 int mei_amthif_release(struct mei_device *dev, struct file *file)
740 if (dev->iamthif_open_count > 0)
741 dev->iamthif_open_count--;
743 if (dev->iamthif_file_object == file &&
744 dev->iamthif_state != MEI_IAMTHIF_IDLE) {
746 dev_dbg(&dev->pdev->dev, "amthif canceled iamthif state %d\n",
747 dev->iamthif_state);
748 dev->iamthif_canceled = true;
749 if (dev->iamthif_state == MEI_IAMTHIF_READ_COMPLETE) {
750 dev_dbg(&dev->pdev->dev, "run next amthif iamthif cb\n");
751 mei_amthif_run_next_cmd(dev);
755 if (mei_clear_lists(dev, file))
756 dev->iamthif_state = MEI_IAMTHIF_IDLE;
758 return 0;