drivers/comedi/comedi_fops.c

328 	struct comedi_async *async = s->async;
333 	if (new_size > async->max_bufsize)
361 		s->index, async->prealloc_bufsz);
381 	if (s && (s->subdev_flags & SDF_CMD_READ) && s->async)
382 		size = s->async->max_bufsize / 1024;
412 	if (s && (s->subdev_flags & SDF_CMD_READ) && s->async)
413 		s->async->max_bufsize = size;
437 	if (s && (s->subdev_flags & SDF_CMD_READ) && s->async)
438 		size = s->async->prealloc_bufsz / 1024;
468 	if (s && (s->subdev_flags & SDF_CMD_READ) && s->async)
494 	if (s && (s->subdev_flags & SDF_CMD_WRITE) && s->async)
495 		size = s->async->max_bufsize / 1024;
525 	if (s && (s->subdev_flags & SDF_CMD_WRITE) && s->async)
526 		s->async->max_bufsize = size;
550 	if (s && (s->subdev_flags & SDF_CMD_WRITE) && s->async)
551 		size = s->async->prealloc_bufsz / 1024;
581 	if (s && (s->subdev_flags & SDF_CMD_WRITE) && s->async)
669  * comedi_is_subdevice_running() - Check if async command running on subdevice
738 	struct comedi_async *async = s->async;
742 	if (async) {
744 		async->inttrig = NULL;
745 		kfree(async->cmd.chanlist);
746 		async->cmd.chanlist = NULL;
748 		wake_up_interruptible_all(&async->wait_head);
751 			"BUG: (?) %s called with async=NULL\n", __func__);
780 		if (s->async)
798 		if (s->async && comedi_buf_is_mmapped(s))
875 	struct comedi_async *async;
887 	async = s->async;
889 	if (!async) {
891 			"subdevice does not have async capability\n");
901 		async->max_bufsize = bc.maximum_size;
910 	bc.size = async->prealloc_bufsz;
911 	bc.maximum_size = async->max_bufsize;
1113 	struct comedi_async *async;
1127 	async = s->async;
1129 	if (!async || s->busy != file)
1133 	if (!(async->cmd.flags & CMDF_WRITE)) {
1168 	bi.buf_write_count = async->buf_write_count;
1169 	bi.buf_write_ptr = async->buf_write_ptr;
1170 	bi.buf_read_count = async->buf_read_count;
1171 	bi.buf_read_ptr = async->buf_read_ptr;
1359 			if (!s->async) {
1360 				dev_dbg(dev->class_dev, "no async\n");
1364 			if (!s->async->inttrig) {
1369 			ret = s->async->inttrig(dev, s, data[0]);
1675 	if (!s->do_cmd || !s->do_cmdtest || !s->async) {
1752 	struct comedi_async *async;
1767 	async = s->async;
1788 	async->cmd = *cmd;
1789 	async->cmd.data = NULL;
1792 	ret = __comedi_get_user_chanlist(dev, s, user_chanlist, &async->cmd);
1796 	ret = s->do_cmdtest(dev, s, &async->cmd);
1798 	if (async->cmd.flags & CMDF_BOGUS || ret) {
1800 		*cmd = async->cmd;
1809 	if (!async->prealloc_bufsz) {
1817 	async->cb_mask = COMEDI_CB_BLOCK | COMEDI_CB_CANCEL_MASK;
1818 	if (async->cmd.flags & CMDF_WAKE_EOS)
1819 		async->cb_mask |= COMEDI_CB_EOS;
1983 	if (!s->async)
2065 	if (s_old && s_old->busy == file && s_old->async &&
2066 	    !(s_old->async->cmd.flags & CMDF_WRITE))
2108 	if (s_old && s_old->busy == file && s_old->async &&
2109 	    (s_old->async->cmd.flags & CMDF_WRITE))
2326 	struct comedi_async *async;
2359 	async = s->async;
2360 	if (!async) {
2372 	if (size > async->prealloc_bufsz) {
2441 	if (s && s->async) {
2442 		poll_wait(file, &s->async->wait_head, wait);
2444 		    (s->async->cmd.flags & CMDF_WRITE) ||
2450 	if (s && s->async) {
2454 			poll_wait(file, &s->async->wait_head, wait);
2456 		    !(s->async->cmd.flags & CMDF_WRITE) ||
2470 	struct comedi_async *async;
2493 	if (!s || !s->async) {
2498 	async = s->async;
2499 	if (s->busy != file || !(async->cmd.flags & CMDF_WRITE)) {
2504 	add_wait_queue(&async->wait_head, &wait);
2523 		comedi_buf_write_alloc(s, async->prealloc_bufsz);
2538 			    !(async->cmd.flags & CMDF_WRITE)) {
2546 		wp = async->buf_write_ptr;
2547 		n1 = min(n, async->prealloc_bufsz - wp);
2549 		m = copy_from_user(async->prealloc_buf + wp, buf, n1);
2553 			m = copy_from_user(async->prealloc_buf, buf + n1, n2);
2565 	remove_wait_queue(&async->wait_head, &wait);
2589 		    s == new_s && new_s->async == async && s->busy == file &&
2590 		    (async->cmd.flags & CMDF_WRITE) &&
2606 	struct comedi_async *async;
2629 	if (!s || !s->async) {
2634 	async = s->async;
2635 	if (s->busy != file || (async->cmd.flags & CMDF_WRITE)) {
2640 	add_wait_queue(&async->wait_head, &wait);
2672 			    (async->cmd.flags & CMDF_WRITE)) {
2680 		rp = async->buf_read_ptr;
2681 		n1 = min(n, async->prealloc_bufsz - rp);
2683 		m = copy_to_user(buf, async->prealloc_buf + rp, n1);
2687 			m = copy_to_user(buf + n1, async->prealloc_buf, n2);
2701 	remove_wait_queue(&async->wait_head, &wait);
2725 		    s == new_s && new_s->async == async && s->busy == file &&
2726 		    !(async->cmd.flags & CMDF_WRITE) &&
3203 	struct comedi_async *async = s->async;
3210 	events = async->events;
3211 	async->events = 0;
3227 	if (async->cb_mask & events) {
3228 		wake_up_interruptible(&async->wait_head);
3229 		si_code = async->cmd.flags & CMDF_WRITE ? POLL_OUT : POLL_IN;