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SCSI: use the proper semaphore to protect the class lists

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SCSI was using the incorrect lock to protect walking the list of all
devices in the class.  This patch fixes this.

Cc: James Bottomley <James.Bottomley@SteelEye.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Greg Kroah-Hartman 2007-04-09 11:52:31 -04:00
parent 49f019d66d
commit b7bb125dc3
1 changed files with 2 additions and 2 deletions
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4
drivers/scsi/hosts.c
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@ -435,7 +435,7 @@ struct Scsi_Host *scsi_host_lookup(unsigned short hostnum)
struct class_device *cdev;
struct Scsi_Host *shost = ERR_PTR(-ENXIO), *p;
down_read(&class->subsys.rwsem);
down(&class->sem);
list_for_each_entry(cdev, &class->children, node) {
p = class_to_shost(cdev);
if (p->host_no == hostnum) {
@ -443,7 +443,7 @@ struct Scsi_Host *scsi_host_lookup(unsigned short hostnum)
break;
}
}
up_read(&class->subsys.rwsem);
up(&class->sem);
return shost;
}