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Message-Id: <20070831.184243.74567713.k-ueda@ct.jp.nec.com>
Date: Fri, 31 Aug 2007 18:42:43 -0400 (EDT)
From: Kiyoshi Ueda <k-ueda@...jp.nec.com>
To: linux-kernel@...r.kernel.org, linux-scsi@...r.kernel.org,
linux-ide@...r.kernel.org, jens.axboe@...cle.com,
mike.miller@...com, grant.likely@...retlab.ca
Cc: dm-devel@...hat.com, j-nomura@...jp.nec.com, k-ueda@...jp.nec.com
Subject: [PATCH 4/7] blk_end_request: cciss/cpqarray/xsysace change
This patch changes "odd" drivers to use blk_end_request().
The drivers are cciss, cpqarray and xsysace.
cciss and cpqarray directly call bio_endio() and disk_stat_add()
when completing request. But those can be replaced with
__end_that_request_first().
After the replacement, request completion procedures of those drivers
become like the following:
o end_that_request_first()
o add_disk_randomness()
o end_that_request_last()
This can be converted to blk_end_request() by following
the rule (a) mentioned in the patch subject
"[PATCH 3/7] blk_end_request: changing "normal" drivers".
xsysace driver has a state machine in it.
It calls end_that_request_first() and end_that_request_last()
from different states. (ACE_FSM_STATE_REQ_TRANSFER and
ACE_FSM_STATE_REQ_COMPLETE, respectively.)
However, those states are consecutive and without any interruption
inbetween.
So we can just follow the standard conversion rule (a) mentioned in
the patch subject "[PATCH 3/7] blk_end_request: changing "normal" drivers".
Signed-off-by: Kiyoshi Ueda <k-ueda@...jp.nec.com>
Signed-off-by: Jun'ichi Nomura <j-nomura@...jp.nec.com>
---
cciss.c | 26 +++-----------------------
cpqarray.c | 28 ++--------------------------
xsysace.c | 5 +----
3 files changed, 6 insertions(+), 53 deletions(-)
diff -rupN 03-normal-caller-change/drivers/block/cciss.c 04-other-caller-change/drivers/block/cciss.c
--- 03-normal-caller-change/drivers/block/cciss.c 2007-08-13 00:25:24.000000000 -0400
+++ 04-other-caller-change/drivers/block/cciss.c 2007-08-23 17:54:19.000000000 -0400
@@ -1187,18 +1187,6 @@ static int cciss_ioctl(struct inode *ino
}
}
-static inline void complete_buffers(struct bio *bio, int status)
-{
- while (bio) {
- struct bio *xbh = bio->bi_next;
- int nr_sectors = bio_sectors(bio);
-
- bio->bi_next = NULL;
- bio_endio(bio, nr_sectors << 9, status ? 0 : -EIO);
- bio = xbh;
- }
-}
-
static void cciss_check_queues(ctlr_info_t *h)
{
int start_queue = h->next_to_run;
@@ -1264,21 +1252,14 @@ static void cciss_softirq_done(struct re
pci_unmap_page(h->pdev, temp64.val, cmd->SG[i].Len, ddir);
}
- complete_buffers(rq->bio, (rq->errors == 0));
-
- if (blk_fs_request(rq)) {
- const int rw = rq_data_dir(rq);
-
- disk_stat_add(rq->rq_disk, sectors[rw], rq->nr_sectors);
- }
-
#ifdef CCISS_DEBUG
printk("Done with %p\n", rq);
#endif /* CCISS_DEBUG */
- add_disk_randomness(rq->rq_disk);
+ if (blk_end_request(rq, (rq->errors == 0), blk_rq_size(rq)))
+ BUG();
+
spin_lock_irqsave(&h->lock, flags);
- end_that_request_last(rq, (rq->errors == 0));
cmd_free(h, cmd, 1);
cciss_check_queues(h);
spin_unlock_irqrestore(&h->lock, flags);
@@ -2504,7 +2485,6 @@ after_error_processing:
}
cmd->rq->data_len = 0;
cmd->rq->completion_data = cmd;
- blk_add_trace_rq(cmd->rq->q, cmd->rq, BLK_TA_COMPLETE);
blk_complete_request(cmd->rq);
}
diff -rupN 03-normal-caller-change/drivers/block/cpqarray.c 04-other-caller-change/drivers/block/cpqarray.c
--- 03-normal-caller-change/drivers/block/cpqarray.c 2007-08-13 00:25:24.000000000 -0400
+++ 04-other-caller-change/drivers/block/cpqarray.c 2007-08-23 17:54:19.000000000 -0400
@@ -166,7 +166,6 @@ static void start_io(ctlr_info_t *h);
static inline void addQ(cmdlist_t **Qptr, cmdlist_t *c);
static inline cmdlist_t *removeQ(cmdlist_t **Qptr, cmdlist_t *c);
-static inline void complete_buffers(struct bio *bio, int ok);
static inline void complete_command(cmdlist_t *cmd, int timeout);
static irqreturn_t do_ida_intr(int irq, void *dev_id);
@@ -978,20 +977,6 @@ static void start_io(ctlr_info_t *h)
}
}
-static inline void complete_buffers(struct bio *bio, int ok)
-{
- struct bio *xbh;
- while(bio) {
- int nr_sectors = bio_sectors(bio);
-
- xbh = bio->bi_next;
- bio->bi_next = NULL;
-
- bio_endio(bio, nr_sectors << 9, ok ? 0 : -EIO);
-
- bio = xbh;
- }
-}
/*
* Mark all buffers that cmd was responsible for
*/
@@ -1029,18 +1014,9 @@ static inline void complete_command(cmdl
pci_unmap_page(hba[cmd->ctlr]->pci_dev, cmd->req.sg[i].addr,
cmd->req.sg[i].size, ddir);
- complete_buffers(rq->bio, ok);
-
- if (blk_fs_request(rq)) {
- const int rw = rq_data_dir(rq);
-
- disk_stat_add(rq->rq_disk, sectors[rw], rq->nr_sectors);
- }
-
- add_disk_randomness(rq->rq_disk);
-
DBGPX(printk("Done with %p\n", rq););
- end_that_request_last(rq, ok ? 1 : -EIO);
+ if (__blk_end_request(rq, ok, blk_rq_size(rq)))
+ BUG();
}
/*
diff -rupN 03-normal-caller-change/drivers/block/xsysace.c 04-other-caller-change/drivers/block/xsysace.c
--- 03-normal-caller-change/drivers/block/xsysace.c 2007-08-22 18:54:04.000000000 -0400
+++ 04-other-caller-change/drivers/block/xsysace.c 2007-08-23 17:54:19.000000000 -0400
@@ -696,7 +696,7 @@ static void ace_fsm_dostate(struct ace_d
/* bio finished; is there another one? */
i = ace->req->current_nr_sectors;
- if (end_that_request_first(ace->req, 1, i)) {
+ if (__blk_end_request(ace->req, 1, i)) {
/* dev_dbg(ace->dev, "next block; h=%li c=%i\n",
* ace->req->hard_nr_sectors,
* ace->req->current_nr_sectors);
@@ -711,9 +711,6 @@ static void ace_fsm_dostate(struct ace_d
break;
case ACE_FSM_STATE_REQ_COMPLETE:
- /* Complete the block request */
- blkdev_dequeue_request(ace->req);
- end_that_request_last(ace->req, 1);
ace->req = NULL;
/* Finished request; go to idle state */
-
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