[PATCH 4.5 86/87] Revert "scsi: fix soft lockup in scsi_remove_target() on module removal"

Greg Kroah-Hartman
2016-05-30T21:06:48Z

From: Johannes Thumshirn <jthumshirn@suse.de>

commit 305c2e71b3d733ec065cb716c76af7d554bd5571 upstream.

Now that we've done a more comprehensive fix with the intermediate
target state we can remove the previous hack introduced with commit
90a88d6ef88e ("scsi: fix soft lockup in scsi_remove_target() on module
removal").

Signed-off-by: Johannes Thumshirn <jthumshirn@suse.de>
Reviewed-by: Ewan D. Milne <emilne@redhat.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
drivers/scsi/scsi_sysfs.c | 6 ++----
1 file changed, 2 insertions(+), 4 deletions(-)

--- a/drivers/scsi/scsi_sysfs.c
+++ b/drivers/scsi/scsi_sysfs.c
@@ -1272,19 +1272,17 @@ static void __scsi_remove_target(struct
void scsi_remove_target(struct device *dev)
{
struct Scsi_Host *shost = dev_to_shost(dev->parent);
- struct scsi_target *starget, *last_target = NULL;
+ struct scsi_target *starget;
unsigned long flags;

restart:
spin_lock_irqsave(shost->host_lock, flags);
list_for_each_entry(starget, &shost->__targets, siblings) {
if (starget->state == STARGET_DEL ||
- starget->state == STARGET_REMOVE ||
- starget == last_target)
+ starget->state == STARGET_REMOVE)
continue;
if (starget->dev.parent == dev || &starget->dev == dev) {
kref_get(&starget->reap_ref);
- last_target = starget;
starget->state = STARGET_REMOVE;
spin_unlock_irqrestore(shost->host_lock, flags);
__scsi_remove_target(starget);