lk/linux-kernel-test
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

[SCSI] bsg: add release callback support

Browse Source 
This patch adds release callback support, which is called when a bsg
device goes away. bsg_register_queue() takes a pointer to a callback
function. This feature is useful for stuff like sas_host that can't
use the release callback in struct device.

If a caller doesn't need bsg's release callback, it can call
bsg_register_queue() with NULL pointer (e.g. scsi devices can use
release callback in struct device so they don't need bsg's callback).

With this patch, bsg uses kref for refcounts on bsg devices instead of
get/put_device in fops->open/release. bsg calls put_device and the
caller's release callback (if it was registered) in kref_put's
release.

Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
This commit is contained in:
FUJITA Tomonori
2008-04-19 00:43:14 +09:00
committed by James Bottomley
parent 643eb2d932
commit 97f46ae45c
4 changed files with 41 additions and 20 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/scsi/scsi_sysfs.c
View File

@@ -889,7 +889,7 @@ int scsi_sysfs_add_sdev(struct scsi_device *sdev)
goto out;
}
error = bsg_register_queue(rq, &sdev->sdev_gendev, NULL);
error = bsg_register_queue(rq, &sdev->sdev_gendev, NULL, NULL);
if (error)
sdev_printk(KERN_INFO, sdev,