MIPS: TXx9: Add mtd support

[linux-2.6-omap-h63xx.git] / block / elevator.c

diff --git a/block/elevator.c b/block/elevator.c
index 902dd1344d56dfb9000ba5701dbb250bcf835d27..04518921db31bb66c115752d62c2a35df11e98e3 100644 (file)
--- a/block/elevator.c
+++ b/block/elevator.c
@@ -34,8 +34,9 @@
 #include <linux/delay.h>
 #include <linux/blktrace_api.h>
 #include <linux/hash.h>
+#include <linux/uaccess.h>
 
-#include <asm/uaccess.h>
+#include "blk.h"
 
 static DEFINE_SPINLOCK(elv_list_lock);
 static LIST_HEAD(elv_list);
@@ -74,6 +75,12 @@ int elv_rq_merge_ok(struct request *rq, struct bio *bio)
        if (!rq_mergeable(rq))
                return 0;
 
+       /*
+        * Don't merge file system requests and discard requests
+        */
+       if (bio_discard(bio) != bio_discard(rq->bio))
+               return 0;
+
        /*
         * different data direction or already started, don't merge
         */
@@ -86,6 +93,12 @@ int elv_rq_merge_ok(struct request *rq, struct bio *bio)
        if (rq->rq_disk != bio->bi_bdev->bd_disk || rq->special)
                return 0;
 
+       /*
+        * only merge integrity protected bio into ditto rq
+        */
+       if (bio_integrity(bio) != blk_integrity_rq(rq))
+               return 0;
+
        if (!elv_iosched_allow_merge(rq, bio))
                return 0;
 
@@ -144,7 +157,7 @@ static struct elevator_type *elevator_get(const char *name)
                else
                        sprintf(elv, "%s-iosched", name);
 
-               request_module(elv);
+               request_module("%s", elv);
                spin_lock(&elv_list_lock);
                e = elevator_find(name);
        }
@@ -432,6 +445,8 @@ void elv_dispatch_sort(struct request_queue *q, struct request *rq)
        list_for_each_prev(entry, &q->queue_head) {
                struct request *pos = list_entry_rq(entry);
 
+               if (blk_discard_rq(rq) != blk_discard_rq(pos))
+                       break;
                if (rq_data_dir(rq) != rq_data_dir(pos))
                        break;
                if (pos->cmd_flags & stop_flags)
@@ -601,7 +616,7 @@ void elv_insert(struct request_queue *q, struct request *rq, int where)
                break;
 
        case ELEVATOR_INSERT_SORT:
-               BUG_ON(!blk_fs_request(rq));
+               BUG_ON(!blk_fs_request(rq) && !blk_discard_rq(rq));
                rq->cmd_flags |= REQ_SORTED;
                q->nr_sorted++;
                if (rq_mergeable(rq)) {
@@ -686,7 +701,7 @@ void __elv_add_request(struct request_queue *q, struct request *rq, int where,
                 * this request is scheduling boundary, update
                 * end_sector
                 */
-               if (blk_fs_request(rq)) {
+               if (blk_fs_request(rq) || blk_discard_rq(rq)) {
                        q->end_sector = rq_end_sector(rq);
                        q->boundary_rq = rq;
                }
@@ -739,7 +754,7 @@ struct request *elv_next_request(struct request_queue *q)
                 * not ever see it.
                 */
                if (blk_empty_barrier(rq)) {
-                       end_queued_request(rq, 1);
+                       __blk_end_request(rq, 0, blk_rq_bytes(rq));
                        continue;
                }
                if (!(rq->cmd_flags & REQ_STARTED)) {
@@ -758,6 +773,12 @@ struct request *elv_next_request(struct request_queue *q)
                         */
                        rq->cmd_flags |= REQ_STARTED;
                        blk_add_trace_rq(q, rq, BLK_TA_ISSUE);
+
+                       /*
+                        * We are now handing the request to the hardware,
+                        * add the timeout handler
+                        */
+                       blk_add_timer(rq);
                }
 
                if (!q->boundary_rq || q->boundary_rq == rq) {
@@ -776,7 +797,6 @@ struct request *elv_next_request(struct request_queue *q)
                         * device can handle
                         */
                        rq->nr_phys_segments++;
-                       rq->nr_hw_segments++;
                }
 
                if (!q->prep_rq_fn)
@@ -799,14 +819,13 @@ struct request *elv_next_request(struct request_queue *q)
                                 * so that we don't add it again
                                 */
                                --rq->nr_phys_segments;
-                               --rq->nr_hw_segments;
                        }
 
                        rq = NULL;
                        break;
                } else if (ret == BLKPREP_KILL) {
                        rq->cmd_flags |= REQ_QUIET;
-                       end_queued_request(rq, 0);
+                       __blk_end_request(rq, -EIO, blk_rq_bytes(rq));
                } else {
                        printk(KERN_ERR "%s: bad return=%d\n", __func__, ret);
                        break;
@@ -895,6 +914,19 @@ int elv_may_queue(struct request_queue *q, int rw)
        return ELV_MQUEUE_MAY;
 }
 
+void elv_abort_queue(struct request_queue *q)
+{
+       struct request *rq;
+
+       while (!list_empty(&q->queue_head)) {
+               rq = list_entry_rq(q->queue_head.next);
+               rq->cmd_flags |= REQ_QUIET;
+               blk_add_trace_rq(q, rq, BLK_TA_ABORT);
+               __blk_end_request(rq, -EIO, blk_rq_bytes(rq));
+       }
+}
+EXPORT_SYMBOL(elv_abort_queue);
+
 void elv_completed_request(struct request_queue *q, struct request *rq)
 {
        elevator_t *e = q->elevator;