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authorLinus Torvalds <torvalds@linux-foundation.org>2010-10-22 17:03:12 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2010-10-22 17:03:12 -0700
commit8abfc6e7a45eb74e51904bbae676fae008b11366 (patch)
tree57d0a24558c0693e3a52e8e756616f6c72def1e9 /drivers/block/ataflop.c
parente9dd2b6837e26fe202708cce5ea4bb4ee3e3482e (diff)
parent6362beea8914cbd4630ccde3617d944aeca2d48f (diff)
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Merge branch 'for-2.6.37/drivers' of git://git.kernel.dk/linux-2.6-block
* 'for-2.6.37/drivers' of git://git.kernel.dk/linux-2.6-block: (95 commits) cciss: fix PCI IDs for new Smart Array controllers drbd: add race-breaker to drbd_go_diskless drbd: use dynamic_dev_dbg to optionally log uuid changes dynamic_debug.h: Fix dynamic_dev_dbg() macro if CONFIG_DYNAMIC_DEBUG not set drbd: cleanup: change "<= 0" to "== 0" drbd: relax the grace period of the md_sync timer again drbd: add some more explicit drbd_md_sync drbd: drop wrong debug asserts, fix recently introduced race drbd: cleanup useless leftover warn/error printk's drbd: add explicit drbd_md_sync to drbd_resync_finished drbd: Do not log an ASSERT for P_OV_REQUEST packets while C_CONNECTED drbd: fix for possible deadlock on IO error during resync drbd: fix unlikely access after free and list corruption drbd: fix for spurious fullsync (uuids rotated too fast) drbd: allow for explicit resync-finished notifications drbd: preparation commit, using full state in receive_state() drbd: drbd_send_ack_dp must not rely on header information drbd: Fix regression in recv_bm_rle_bits (compressed bitmap) drbd: Fixed a stupid copy and paste error drbd: Allow larger values for c-fill-target. ... Fix up trivial conflict in drivers/block/ataflop.c due to BKL removal
Diffstat (limited to 'drivers/block/ataflop.c')
-rw-r--r--drivers/block/ataflop.c50
1 files changed, 39 insertions, 11 deletions
diff --git a/drivers/block/ataflop.c b/drivers/block/ataflop.c
index 8c021bb..4e4cc6c 100644
--- a/drivers/block/ataflop.c
+++ b/drivers/block/ataflop.c
@@ -80,8 +80,8 @@
#undef DEBUG
static DEFINE_MUTEX(ataflop_mutex);
-static struct request_queue *floppy_queue;
static struct request *fd_request;
+static int fdc_queue;
/* Disk types: DD, HD, ED */
static struct atari_disk_type {
@@ -1392,6 +1392,29 @@ static void setup_req_params( int drive )
ReqTrack, ReqSector, (unsigned long)ReqData ));
}
+/*
+ * Round-robin between our available drives, doing one request from each
+ */
+static struct request *set_next_request(void)
+{
+ struct request_queue *q;
+ int old_pos = fdc_queue;
+ struct request *rq;
+
+ do {
+ q = unit[fdc_queue].disk->queue;
+ if (++fdc_queue == FD_MAX_UNITS)
+ fdc_queue = 0;
+ if (q) {
+ rq = blk_fetch_request(q);
+ if (rq)
+ break;
+ }
+ } while (fdc_queue != old_pos);
+
+ return rq;
+}
+
static void redo_fd_request(void)
{
@@ -1406,7 +1429,7 @@ static void redo_fd_request(void)
repeat:
if (!fd_request) {
- fd_request = blk_fetch_request(floppy_queue);
+ fd_request = set_next_request();
if (!fd_request)
goto the_end;
}
@@ -1933,10 +1956,6 @@ static int __init atari_floppy_init (void)
PhysTrackBuffer = virt_to_phys(TrackBuffer);
BufferDrive = BufferSide = BufferTrack = -1;
- floppy_queue = blk_init_queue(do_fd_request, &ataflop_lock);
- if (!floppy_queue)
- goto Enomem;
-
for (i = 0; i < FD_MAX_UNITS; i++) {
unit[i].track = -1;
unit[i].flags = 0;
@@ -1945,7 +1964,10 @@ static int __init atari_floppy_init (void)
sprintf(unit[i].disk->disk_name, "fd%d", i);
unit[i].disk->fops = &floppy_fops;
unit[i].disk->private_data = &unit[i];
- unit[i].disk->queue = floppy_queue;
+ unit[i].disk->queue = blk_init_queue(do_fd_request,
+ &ataflop_lock);
+ if (!unit[i].disk->queue)
+ goto Enomem;
set_capacity(unit[i].disk, MAX_DISK_SIZE * 2);
add_disk(unit[i].disk);
}
@@ -1960,10 +1982,14 @@ static int __init atari_floppy_init (void)
return 0;
Enomem:
- while (i--)
+ while (i--) {
+ struct request_queue *q = unit[i].disk->queue;
+
put_disk(unit[i].disk);
- if (floppy_queue)
- blk_cleanup_queue(floppy_queue);
+ if (q)
+ blk_cleanup_queue(q);
+ }
+
unregister_blkdev(FLOPPY_MAJOR, "fd");
return -ENOMEM;
}
@@ -2012,12 +2038,14 @@ static void __exit atari_floppy_exit(void)
int i;
blk_unregister_region(MKDEV(FLOPPY_MAJOR, 0), 256);
for (i = 0; i < FD_MAX_UNITS; i++) {
+ struct request_queue *q = unit[i].disk->queue;
+
del_gendisk(unit[i].disk);
put_disk(unit[i].disk);
+ blk_cleanup_queue(q);
}
unregister_blkdev(FLOPPY_MAJOR, "fd");
- blk_cleanup_queue(floppy_queue);
del_timer_sync(&fd_timer);
atari_stram_free( DMABuffer );
}