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path: root/drivers/scsi/sr.c
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Diffstat (limited to 'drivers/scsi/sr.c')
-rw-r--r--drivers/scsi/sr.c59
1 files changed, 40 insertions, 19 deletions
diff --git a/drivers/scsi/sr.c b/drivers/scsi/sr.c
index 902eb11..a0c4e13 100644
--- a/drivers/scsi/sr.c
+++ b/drivers/scsi/sr.c
@@ -78,7 +78,6 @@ MODULE_ALIAS_SCSI_DEVICE(TYPE_WORM);
static int sr_probe(struct device *);
static int sr_remove(struct device *);
-static int sr_init_command(struct scsi_cmnd *);
static struct scsi_driver sr_template = {
.owner = THIS_MODULE,
@@ -87,7 +86,6 @@ static struct scsi_driver sr_template = {
.probe = sr_probe,
.remove = sr_remove,
},
- .init_command = sr_init_command,
};
static unsigned long sr_index_bits[SR_DISKS / BITS_PER_LONG];
@@ -296,19 +294,39 @@ static void rw_intr(struct scsi_cmnd * SCpnt)
scsi_io_completion(SCpnt, good_bytes);
}
-static int sr_init_command(struct scsi_cmnd * SCpnt)
+static int sr_prep_fn(struct request_queue *q, struct request *rq)
{
int block=0, this_count, s_size, timeout = SR_TIMEOUT;
- struct scsi_cd *cd = scsi_cd(SCpnt->request->rq_disk);
+ struct scsi_cd *cd;
+ struct scsi_cmnd *SCpnt;
+ struct scsi_device *sdp = q->queuedata;
+ int ret;
+
+ if (rq->cmd_type == REQ_TYPE_BLOCK_PC) {
+ ret = scsi_setup_blk_pc_cmnd(sdp, rq);
+ goto out;
+ } else if (rq->cmd_type != REQ_TYPE_FS) {
+ ret = BLKPREP_KILL;
+ goto out;
+ }
+ ret = scsi_setup_fs_cmnd(sdp, rq);
+ if (ret != BLKPREP_OK)
+ goto out;
+ SCpnt = rq->special;
+ cd = scsi_cd(rq->rq_disk);
+
+ /* from here on until we're complete, any goto out
+ * is used for a killable error condition */
+ ret = BLKPREP_KILL;
SCSI_LOG_HLQUEUE(1, printk("Doing sr request, dev = %s, block = %d\n",
cd->disk->disk_name, block));
if (!cd->device || !scsi_device_online(cd->device)) {
SCSI_LOG_HLQUEUE(2, printk("Finishing %ld sectors\n",
- SCpnt->request->nr_sectors));
+ rq->nr_sectors));
SCSI_LOG_HLQUEUE(2, printk("Retry with 0x%p\n", SCpnt));
- return 0;
+ goto out;
}
if (cd->device->changed) {
@@ -316,7 +334,7 @@ static int sr_init_command(struct scsi_cmnd * SCpnt)
* quietly refuse to do anything to a changed disc until the
* changed bit has been reset
*/
- return 0;
+ goto out;
}
/*
@@ -333,21 +351,21 @@ static int sr_init_command(struct scsi_cmnd * SCpnt)
if (s_size != 512 && s_size != 1024 && s_size != 2048) {
scmd_printk(KERN_ERR, SCpnt, "bad sector size %d\n", s_size);
- return 0;
+ goto out;
}
- if (rq_data_dir(SCpnt->request) == WRITE) {
+ if (rq_data_dir(rq) == WRITE) {
if (!cd->device->writeable)
- return 0;
+ goto out;
SCpnt->cmnd[0] = WRITE_10;
SCpnt->sc_data_direction = DMA_TO_DEVICE;
cd->cdi.media_written = 1;
- } else if (rq_data_dir(SCpnt->request) == READ) {
+ } else if (rq_data_dir(rq) == READ) {
SCpnt->cmnd[0] = READ_10;
SCpnt->sc_data_direction = DMA_FROM_DEVICE;
} else {
- blk_dump_rq_flags(SCpnt->request, "Unknown sr command");
- return 0;
+ blk_dump_rq_flags(rq, "Unknown sr command");
+ goto out;
}
{
@@ -368,10 +386,10 @@ static int sr_init_command(struct scsi_cmnd * SCpnt)
/*
* request doesn't start on hw block boundary, add scatter pads
*/
- if (((unsigned int)SCpnt->request->sector % (s_size >> 9)) ||
+ if (((unsigned int)rq->sector % (s_size >> 9)) ||
(SCpnt->request_bufflen % s_size)) {
scmd_printk(KERN_NOTICE, SCpnt, "unaligned transfer\n");
- return 0;
+ goto out;
}
this_count = (SCpnt->request_bufflen >> 9) / (s_size >> 9);
@@ -379,12 +397,12 @@ static int sr_init_command(struct scsi_cmnd * SCpnt)
SCSI_LOG_HLQUEUE(2, printk("%s : %s %d/%ld 512 byte blocks.\n",
cd->cdi.name,
- (rq_data_dir(SCpnt->request) == WRITE) ?
+ (rq_data_dir(rq) == WRITE) ?
"writing" : "reading",
- this_count, SCpnt->request->nr_sectors));
+ this_count, rq->nr_sectors));
SCpnt->cmnd[1] = 0;
- block = (unsigned int)SCpnt->request->sector / (s_size >> 9);
+ block = (unsigned int)rq->sector / (s_size >> 9);
if (this_count > 0xffff) {
this_count = 0xffff;
@@ -419,7 +437,9 @@ static int sr_init_command(struct scsi_cmnd * SCpnt)
* This indicates that the command is ready from our end to be
* queued.
*/
- return 1;
+ ret = BLKPREP_OK;
+ out:
+ return scsi_prep_return(q, rq, ret);
}
static int sr_block_open(struct inode *inode, struct file *file)
@@ -590,6 +610,7 @@ static int sr_probe(struct device *dev)
/* FIXME: need to handle a get_capabilities failure properly ?? */
get_capabilities(cd);
+ blk_queue_prep_rq(sdev->request_queue, sr_prep_fn);
sr_vendor_init(cd);
disk->driverfs_dev = &sdev->sdev_gendev;
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