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OpenCloudOS-Kernel
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scsi: use class iteration api 

Convert to use the class iteration api.

Signed-off-by: Dave Young <hidave.darkstar@gmail.com>
Cc: James Bottomley <James.Bottomley@hansenpartnership.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Dave Young 2008-01-22 14:01:34 +08:00 committed by Greg Kroah-Hartman
parent 71da890509
commit 9c7701088a
1 changed files with 13 additions and 11 deletions
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24
drivers/scsi/hosts.c
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@ -429,6 +429,15 @@ void scsi_unregister(struct Scsi_Host *shost)
}
EXPORT_SYMBOL(scsi_unregister);
static int __scsi_host_match(struct class_device *cdev, void *data)
{
struct Scsi_Host *p;
unsigned short *hostnum = (unsigned short *)data;
p = class_to_shost(cdev);
return p->host_no == *hostnum;
}
/**
* scsi_host_lookup - get a reference to a Scsi_Host by host no
*
@ -439,19 +448,12 @@ EXPORT_SYMBOL(scsi_unregister);
**/
struct Scsi_Host *scsi_host_lookup(unsigned short hostnum)
{
struct class *class = &shost_class;
struct class_device *cdev;
struct Scsi_Host *shost = ERR_PTR(-ENXIO), *p;
struct Scsi_Host *shost = ERR_PTR(-ENXIO);
down(&class->sem);
list_for_each_entry(cdev, &class->children, node) {
p = class_to_shost(cdev);
if (p->host_no == hostnum) {
shost = scsi_host_get(p);
break;
}
}
up(&class->sem);
cdev = class_find_child(&shost_class, &hostnum, __scsi_host_match);
if (cdev)
shost = scsi_host_get(class_to_shost(cdev));
return shost;
}