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authorJames Bottomley <James.Bottomley@steeleye.com>2007-07-19 10:15:10 -0500
committerJames Bottomley <jejb@mulgrave.localdomain>2007-07-19 12:37:34 -0500
commit80ed71ce1a3369521c693ebf30abb9cfe1dc7e66 (patch)
treef439b74804b10b04a34fe0c3f4c4597f1f7e890a
parentb02b6bc46571b21a545c9e697df1e226ff22bc81 (diff)
[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: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Acked-by: Jens Axboe <jens.axboe@oracle.com> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
-rw-r--r--block/Kconfig2
-rw-r--r--block/bsg.c30
-rw-r--r--drivers/scsi/scsi_sysfs.c13
3 files changed, 14 insertions, 31 deletions
diff --git a/block/Kconfig b/block/Kconfig
index 0768741d681..ca2ef4e0849 100644
--- a/block/Kconfig
+++ b/block/Kconfig
@@ -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.
diff --git a/block/bsg.c b/block/bsg.c
index baa04e7adf1..4e0be1b2e2a 100644
--- a/block/bsg.c
+++ b/block/bsg.c
@@ -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:
diff --git a/drivers/scsi/scsi_sysfs.c b/drivers/scsi/scsi_sysfs.c
index 34e483d31c1..ad5f21fd5d4 100644
--- a/drivers/scsi/scsi_sysfs.c
+++ b/drivers/scsi/scsi_sysfs.c
@@ -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);