> -----Original Message----- > From: Kiyoshi Ueda [mailto:k-ueda@xxxxxxxxxxxxx] > Sent: Tuesday, December 11, 2007 4:50 PM > To: jens.axboe@xxxxxxxxxx > Cc: linux-kernel@xxxxxxxxxxxxxxx; linux-scsi@xxxxxxxxxxxxxxx; > linux-ide@xxxxxxxxxxxxxxx; dm-devel@xxxxxxxxxx; > j-nomura@xxxxxxxxxxxxx; k-ueda@xxxxxxxxxxxxx; Miller, Mike (OS Dev) > Subject: [PATCH 22/30] blk_end_request: changing cpqarray (take 4) > > This patch converts cpqarray to use blk_end_request interfaces. > Related 'ok' arguments are converted to 'error'. > > cpqarray is a little bit different from "normal" drivers. > cpqarray 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 (b) mentioned in the patch subject "[PATCH 01/30] > blk_end_request: add new request completion interface". > > Cc: Mike Miller <mike.miller@xxxxxx> > Signed-off-by: Kiyoshi Ueda <k-ueda@xxxxxxxxxxxxx> > Signed-off-by: Jun'ichi Nomura <j-nomura@xxxxxxxxxxxxx> Acked-by: Mike Miller <mike.miller@xxxxxx> > --- > drivers/block/cpqarray.c | 36 +++++++----------------------------- > 1 files changed, 7 insertions(+), 29 deletions(-) > > Index: 2.6.24-rc4/drivers/block/cpqarray.c > =================================================================== > --- 2.6.24-rc4.orig/drivers/block/cpqarray.c > +++ 2.6.24-rc4/drivers/block/cpqarray.c > @@ -167,7 +167,6 @@ 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); @@ > -980,26 +979,13 @@ static void start_io(ctlr_info_t *h) > } > } > > -static inline void complete_buffers(struct bio *bio, int ok) -{ > - struct bio *xbh; > - > - while (bio) { > - xbh = bio->bi_next; > - bio->bi_next = NULL; > - > - bio_endio(bio, ok ? 0 : -EIO); > - > - bio = xbh; > - } > -} > /* > * Mark all buffers that cmd was responsible for > */ > static inline void complete_command(cmdlist_t *cmd, int timeout) { > struct request *rq = cmd->rq; > - int ok=1; > + int error = 0; > int i, ddir; > > if (cmd->req.hdr.rcode & RCODE_NONFATAL && @@ > -1011,16 +997,17 @@ static inline void complete_command(cmdl > if (cmd->req.hdr.rcode & RCODE_FATAL) { > printk(KERN_WARNING "Fatal error on ida/c%dd%d\n", > cmd->ctlr, cmd->hdr.unit); > - ok = 0; > + error = -EIO; > } > if (cmd->req.hdr.rcode & RCODE_INVREQ) { > printk(KERN_WARNING "Invalid > request on ida/c%dd%d = (cmd=%x sect=%d cnt=%d sg=%d ret=%x)\n", > cmd->ctlr, cmd->hdr.unit, > cmd->req.hdr.cmd, > cmd->req.hdr.blk, > cmd->req.hdr.blk_cnt, > cmd->req.hdr.sg_cnt, > cmd->req.hdr.rcode); > - ok = 0; > + error = -EIO; > } > - if (timeout) ok = 0; > + if (timeout) > + error = -EIO; > /* unmap the DMA mapping for all the scatter gather > elements */ > if (cmd->req.hdr.cmd == IDA_READ) > ddir = PCI_DMA_FROMDEVICE; @@ -1030,18 > +1017,9 @@ 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, error, blk_rq_bytes(rq))) > + BUG(); > } > > /* > -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel
