Commit 80ed71ce authored by James Bottomley's avatar James Bottomley Committed by James Bottomley
Browse files

[SCSI] bsg: separate bsg and SCSI (so SCSI can be modular) 



This patch moves the bsg registration into SCSI so that bsg no longer
has a dependency on the scsi_interface_register API.

This can be viewed as a temporary expedient until we can get universal
bsg binding sorted out properly.  Also use the sdev bus_id as the
generic bsg name (to avoid clashes with the queue name).

Acked-by: default avatarFUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Acked-by: default avatarJens Axboe <jens.axboe@oracle.com>
Signed-off-by: default avatarJames Bottomley <James.Bottomley@SteelEye.com>
parent b02b6bc4

block/Kconfig

+1 −1
Original line number Diff line number Diff line
@@ -53,7 +53,7 @@ endif # BLOCK 


config BLK_DEV_BSG

	bool "Block layer SG support v4 (EXPERIMENTAL)"

	depends on (SCSI=y) && EXPERIMENTAL

	depends on EXPERIMENTAL

	---help---

	Saying Y here will enable generic SG (SCSI generic) v4 support

	for any block device.

block/bsg.c

+0 −30
Original line number Diff line number Diff line
@@ -1009,29 +1009,6 @@ err: 
}

EXPORT_SYMBOL_GPL(bsg_register_queue);



static int bsg_add(struct class_device *cl_dev, struct class_interface *cl_intf)

{

	int ret;

	struct scsi_device *sdp = to_scsi_device(cl_dev->dev);

	struct request_queue *rq = sdp->request_queue;



	if (rq->kobj.parent)

		ret = bsg_register_queue(rq, kobject_name(rq->kobj.parent));

	else

		ret = bsg_register_queue(rq, kobject_name(&sdp->sdev_gendev.kobj));

	return ret;

}



static void bsg_remove(struct class_device *cl_dev, struct class_interface *cl_intf)

{

	bsg_unregister_queue(to_scsi_device(cl_dev->dev)->request_queue);

}



static struct class_interface bsg_intf = {

	.add	= bsg_add,

	.remove	= bsg_remove,

};



static struct cdev bsg_cdev = {

	.kobj   = {.name = "bsg", },

	.owner  = THIS_MODULE,
@@ -1069,16 +1046,9 @@ static int __init bsg_init(void) 
	if (ret)

		goto unregister_chrdev;



	ret = scsi_register_interface(&bsg_intf);

	if (ret)

		goto remove_cdev;



	printk(KERN_INFO BSG_DESCRIPTION " version " BSG_VERSION

	       " loaded (major %d)\n", bsg_major);

	return 0;

remove_cdev:

	printk(KERN_ERR "bsg: failed register scsi interface %d\n", ret);

	cdev_del(&bsg_cdev);

unregister_chrdev:

	unregister_chrdev_region(MKDEV(bsg_major, 0), BSG_MAX_DEVS);

destroy_bsg_class:

drivers/scsi/scsi_sysfs.c

+13 −0
Original line number Diff line number Diff line
@@ -715,6 +715,7 @@ static int attr_add(struct device *dev, struct device_attribute *attr) 
int scsi_sysfs_add_sdev(struct scsi_device *sdev)

{

	int error, i;

	struct request_queue *rq = sdev->request_queue;



	if ((error = scsi_device_set_state(sdev, SDEV_RUNNING)) != 0)

		return error;
@@ -734,6 +735,17 @@ int scsi_sysfs_add_sdev(struct scsi_device *sdev) 
	/* take a reference for the sdev_classdev; this is

	 * released by the sdev_class .release */

	get_device(&sdev->sdev_gendev);



	error = bsg_register_queue(rq, sdev->sdev_gendev.bus_id);



	if (error)

		sdev_printk(KERN_INFO, sdev,

			    "Failed to register bsg queue, errno=%d\n", error);



	/* we're treating error on bsg register as non-fatal, so pretend

	 * nothing went wrong */

	error = 0;



	if (sdev->host->hostt->sdev_attrs) {

		for (i = 0; sdev->host->hostt->sdev_attrs[i]; i++) {

			error = attr_add(&sdev->sdev_gendev,
@@ -780,6 +792,7 @@ void __scsi_remove_device(struct scsi_device *sdev) 
	if (scsi_device_set_state(sdev, SDEV_CANCEL) != 0)

		return;



	bsg_unregister_queue(sdev->request_queue);

	class_device_unregister(&sdev->sdev_classdev);

	transport_remove_device(dev);

	device_del(dev);

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