From: Tejun Heo <htejun@gmail.com>
Date: Thu, 23 Jun 2005 07:08:51 +0000 (-0700)
Subject: [PATCH] blk: cleanup generic tag support error messages
X-Git-Tag: v2.6.13-rc1~68^2~469
X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=040c928c47b591d1cd9977cd6431cae213528b45;p=linux-2.6

[PATCH] blk: cleanup generic tag support error messages

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>
---

diff --git a/drivers/block/ll_rw_blk.c b/drivers/block/ll_rw_blk.c
index 99afeec103..c581f9138c 100644
--- a/drivers/block/ll_rw_blk.c
+++ b/drivers/block/ll_rw_blk.c
@@ -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