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authorChristoph Hellwig <hch@lst.de>2006-01-13 19:04:00 +0100
committerJames Bottomley <jejb@mulgrave.(none)>2006-01-14 10:55:05 -0600
commite02f3f59225d8c3b2a0ad0dc941a09865e27da61 (patch)
tree37d2931f5d24dc063d9606ec6b5e8db359b439c7 /drivers/scsi/scsi_scan.c
parent6d5b0c315e0c14f8a0fe274eda7676d62cbd8584 (diff)
[SCSI] remove target parent limitiation
When James Smart fixed the issue of the userspace scan atributes crashing the system with the FC transport class he added a patch to let the transport class check if the parent is valid for a given transport class. When adding support for the integrated raid of fusion sas devices we ran into a problem with that, as it didn't allow adding virtual raid volumes without the transport class knowing about it. So this patch adds a user_scan attribute instead, that takes over from scsi_scan_host_selected if the transport class sets it and thus lets the transport class control the user-initiated scanning. As this plugs the hole about user-initiated scanning the target_parent hook goes away and we rely on callers of the scanning routines to do something sensible. For SAS this meant I had to switch from a spinlock to a mutex to synchronize the topology linked lists, in FC they were completely unsynchronized which seems wrong. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
Diffstat (limited to 'drivers/scsi/scsi_scan.c')
-rw-r--r--drivers/scsi/scsi_scan.c16
1 files changed, 2 insertions, 14 deletions
diff --git a/drivers/scsi/scsi_scan.c b/drivers/scsi/scsi_scan.c
index edcd80b749c..752fb5da3de 100644
--- a/drivers/scsi/scsi_scan.c
+++ b/drivers/scsi/scsi_scan.c
@@ -334,19 +334,6 @@ static struct scsi_target *scsi_alloc_target(struct device *parent,
struct scsi_target *starget;
struct scsi_target *found_target;
- /*
- * Obtain the real parent from the transport. The transport
- * is allowed to fail (no error) if there is nothing at that
- * target id.
- */
- if (shost->transportt->target_parent) {
- spin_lock_irqsave(shost->host_lock, flags);
- parent = shost->transportt->target_parent(shost, channel, id);
- spin_unlock_irqrestore(shost->host_lock, flags);
- if (!parent)
- return NULL;
- }
-
starget = kmalloc(size, GFP_KERNEL);
if (!starget) {
printk(KERN_ERR "%s: allocation failure\n", __FUNCTION__);
@@ -1283,8 +1270,9 @@ struct scsi_device *__scsi_add_device(struct Scsi_Host *shost, uint channel,
struct scsi_device *sdev;
struct device *parent = &shost->shost_gendev;
int res;
- struct scsi_target *starget = scsi_alloc_target(parent, channel, id);
+ struct scsi_target *starget;
+ starget = scsi_alloc_target(parent, channel, id);
if (!starget)
return ERR_PTR(-ENOMEM);