projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 1da177e4 | 1 | /* |
| 98ac2162 | 2 | * linux/drivers/mmc/queue.c |
| 1da177e4 LT |
3 | * |
| 4 | * Copyright (C) 2003 Russell King, All Rights Reserved. | |
| 98ac2162 | 5 | * Copyright 2006-2007 Pierre Ossman |
| 1da177e4 LT |
6 | * |
| 7 | * This program is free software; you can redistribute it and/or modify | |
| 8 | * it under the terms of the GNU General Public License version 2 as | |
| 9 | * published by the Free Software Foundation. | |
| 10 | * | |
| 11 | */ | |
| 12 | #include <linux/module.h> | |
| 13 | #include <linux/blkdev.h> | |
| 87598a2b | 14 | #include <linux/kthread.h> |
| 1da177e4 LT |
15 | |
| 16 | #include <linux/mmc/card.h> | |
| 17 | #include <linux/mmc/host.h> | |
| 98ac2162 | 18 | #include "queue.h" |
| 1da177e4 | 19 | |
| 87598a2b | 20 | #define MMC_QUEUE_SUSPENDED (1 << 0) |
| 1da177e4 LT |
21 | |
| 22 | /* | |
| 9c9f2d63 | 23 | * Prepare a MMC request. This just filters out odd stuff. |
| 1da177e4 LT |
24 | */ |
| 25 | static int mmc_prep_request(struct request_queue *q, struct request *req) | |
| 26 | { | |
| 9c9f2d63 PO |
27 | /* |
| 28 | * We only like normal block requests. | |
| 29 | */ | |
| 30 | if (!blk_fs_request(req) && !blk_pc_request(req)) { | |
| 1da177e4 | 31 | blk_dump_rq_flags(req, "MMC bad request"); |
| 9c9f2d63 | 32 | return BLKPREP_KILL; |
| 1da177e4 LT |
33 | } |
| 34 | ||
| 9c9f2d63 | 35 | req->cmd_flags |= REQ_DONTPREP; |
| 1da177e4 | 36 | |
| 9c9f2d63 | 37 | return BLKPREP_OK; |
| 1da177e4 LT |
38 | } |
| 39 | ||
| 40 | static int mmc_queue_thread(void *d) | |
| 41 | { | |
| 42 | struct mmc_queue *mq = d; | |
| 43 | struct request_queue *q = mq->queue; | |
| 1da177e4 LT |
44 | |
| 45 | /* | |
| 46 | * Set iothread to ensure that we aren't put to sleep by | |
| 47 | * the process freezing. We handle suspension ourselves. | |
| 48 | */ | |
| 49 | current->flags |= PF_MEMALLOC|PF_NOFREEZE; | |
| 50 | ||
| 1da177e4 | 51 | down(&mq->thread_sem); |
| 1da177e4 LT |
52 | do { |
| 53 | struct request *req = NULL; | |
| 54 | ||
| 55 | spin_lock_irq(q->queue_lock); | |
| 56 | set_current_state(TASK_INTERRUPTIBLE); | |
| 57 | if (!blk_queue_plugged(q)) |