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blk_end_request: changing cciss (take 4)
This patch converts cciss to use blk_end_request interfaces. Related 'uptodate' arguments are converted to 'error'. cciss is a little bit different from "normal" drivers. cciss directly calls 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 01/30] blk_end_request: add new request completion interface". Cc: Mike Miller <mike.miller@hp.com> Signed-off-by: Kiyoshi Ueda <k-ueda@ct.jp.nec.com> Signed-off-by: Jun'ichi Nomura <j-nomura@ce.jp.nec.com> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
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5a330e39b1
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1 changed files with 3 additions and 22 deletions
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@ -1187,17 +1187,6 @@ static int cciss_ioctl(struct inode *inode, struct file *filep,
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}
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}
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static inline void complete_buffers(struct bio *bio, int status)
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{
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while (bio) {
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struct bio *xbh = bio->bi_next;
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bio->bi_next = NULL;
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bio_endio(bio, status ? 0 : -EIO);
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bio = xbh;
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}
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}
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static void cciss_check_queues(ctlr_info_t *h)
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{
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int start_queue = h->next_to_run;
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@ -1263,21 +1252,14 @@ static void cciss_softirq_done(struct request *rq)
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pci_unmap_page(h->pdev, temp64.val, cmd->SG[i].Len, ddir);
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}
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complete_buffers(rq->bio, (rq->errors == 0));
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if (blk_fs_request(rq)) {
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const int rw = rq_data_dir(rq);
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disk_stat_add(rq->rq_disk, sectors[rw], rq->nr_sectors);
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}
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#ifdef CCISS_DEBUG
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printk("Done with %p\n", rq);
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#endif /* CCISS_DEBUG */
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add_disk_randomness(rq->rq_disk);
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if (blk_end_request(rq, (rq->errors == 0) ? 0 : -EIO, blk_rq_bytes(rq)))
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BUG();
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spin_lock_irqsave(&h->lock, flags);
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end_that_request_last(rq, (rq->errors == 0));
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cmd_free(h, cmd, 1);
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cciss_check_queues(h);
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spin_unlock_irqrestore(&h->lock, flags);
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@ -2544,7 +2526,6 @@ static inline void complete_command(ctlr_info_t *h, CommandList_struct *cmd,
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}
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cmd->rq->data_len = 0;
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cmd->rq->completion_data = cmd;
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blk_add_trace_rq(cmd->rq->q, cmd->rq, BLK_TA_COMPLETE);
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blk_complete_request(cmd->rq);
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}
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