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[PATCH] blk: cleanup generic tag support error messages

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Add KERN_ERR and __FUNCTION__ to generic tag error messages, and add a comment
in blk_queue_end_tag() which explains the silent failure path.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Acked-by: Jens Axboe <axboe@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Tejun Heo 2005-06-23 00:08:51 -07:00 committed by Linus Torvalds
parent f7d37d028d
commit 040c928c47
1 changed files with 13 additions and 5 deletions
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18
drivers/block/ll_rw_blk.c
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@ -912,10 +912,15 @@ void blk_queue_end_tag(request_queue_t *q, struct request *rq)
BUG_ON(tag == -1);
if (unlikely(tag >= bqt->max_depth))
/*
* This can happen after tag depth has been reduced.
* FIXME: how about a warning or info message here?
*/
return;
if (unlikely(!__test_and_clear_bit(tag, bqt->tag_map))) {
printk("attempt to clear non-busy tag (%d)\n", tag);
printk(KERN_ERR "%s: attempt to clear non-busy tag (%d)\n",
__FUNCTION__, tag);
return;
}
@ -924,7 +929,8 @@ void blk_queue_end_tag(request_queue_t *q, struct request *rq)
rq->tag = -1;
if (unlikely(bqt->tag_index[tag] == NULL))
printk("tag %d is missing\n", tag);
printk(KERN_ERR "%s: tag %d is missing\n",
__FUNCTION__, tag);
bqt->tag_index[tag] = NULL;
bqt->busy--;
@ -957,8 +963,9 @@ int blk_queue_start_tag(request_queue_t *q, struct request *rq)
if (unlikely((rq->flags & REQ_QUEUED))) {
printk(KERN_ERR
"request %p for device [%s] already tagged %d",
rq, rq->rq_disk ? rq->rq_disk->disk_name : "?", rq->tag);
"%s: request %p for device [%s] already tagged %d",
__FUNCTION__, rq,
rq->rq_disk ? rq->rq_disk->disk_name : "?", rq->tag);
BUG();
}
@ -1001,7 +1008,8 @@ void blk_queue_invalidate_tags(request_queue_t *q)
rq = list_entry_rq(tmp);
if (rq->tag == -1) {
printk("bad tag found on list\n");
printk(KERN_ERR
"%s: bad tag found on list\n", __FUNCTION__);
list_del_init(&rq->queuelist);
rq->flags &= ~REQ_QUEUED;
} else