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scsi: bsg: Simplify device registration

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Use the per-device cdev_device_interface to store the bsg data in the char
device inode, and thus remove the need to embedd the bsg_class_device
structure in the request_queue.

Link: https://lore.kernel.org/r/20210729064845.1044147-2-hch@lst.de
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Christoph Hellwig
2021-07-29 08:48:42 +02:00
committed by Martin K. Petersen
parent ba51bdafaa
commit ead09dd3ae
9 changed files with 107 additions and 276 deletions
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11
block/bsg-lib.c
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@@ -6,6 +6,7 @@
* Copyright (C) 2011 Red Hat, Inc. All rights reserved.
* Copyright (C) 2011 Mike Christie
*/
#include <linux/bsg.h>
#include <linux/slab.h>
#include <linux/blk-mq.h>
#include <linux/delay.h>
@@ -19,6 +20,7 @@
struct bsg_set {
struct blk_mq_tag_set tag_set;
struct bsg_device *bd;
bsg_job_fn *job_fn;
bsg_timeout_fn *timeout_fn;
};
@@ -327,7 +329,7 @@ void bsg_remove_queue(struct request_queue *q)
struct bsg_set *bset =
container_of(q->tag_set, struct bsg_set, tag_set);
bsg_unregister_queue(q);
bsg_unregister_queue(bset->bd);
blk_cleanup_queue(q);
blk_mq_free_tag_set(&bset->tag_set);
kfree(bset);
@@ -396,10 +398,9 @@ struct request_queue *bsg_setup_queue(struct device *dev, const char *name,
q->queuedata = dev;
blk_queue_rq_timeout(q, BLK_DEFAULT_SG_TIMEOUT);
ret = bsg_register_queue(q, dev, name, &bsg_transport_ops);
if (ret) {
printk(KERN_ERR "%s: bsg interface failed to "
"initialize - register queue\n", dev->kobj.name);
bset->bd = bsg_register_queue(q, dev, name, &bsg_transport_ops);
if (IS_ERR(bset->bd)) {
ret = PTR_ERR(bset->bd);
goto out_cleanup_queue;
}