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target: Convert se_lun->lun_deve_lock to normal spinlock 

This patch converts se_lun->lun_deve_lock acquire/release access
to use a normal, non bottom-half spin_lock_t for protecting
se_lun->lun_deve_list access.

Reported-by: Christoph Hellwig <hch@lst.de>
Cc: Hannes Reinecke <hare@suse.de>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
This commit is contained in:
Nicholas Bellinger 2015-06-22 23:44:05 -07:00
parent c51c8e7bca
commit 1adff1b3a7
3 changed files with 12 additions and 12 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
drivers/target/target_core_alua.c
View File

@ -968,7 +968,7 @@ static void core_alua_queue_state_change_ua(struct t10_alua_tg_pt_gp *tg_pt_gp)
continue;
spin_unlock(&tg_pt_gp->tg_pt_gp_lock);
spin_lock_bh(&lun->lun_deve_lock);
spin_lock(&lun->lun_deve_lock);
list_for_each_entry(se_deve, &lun->lun_deve_list, lun_link) {
lacl = rcu_dereference_check(se_deve->se_lun_acl,
lockdep_is_held(&lun->lun_deve_lock));
@ -1000,7 +1000,7 @@ static void core_alua_queue_state_change_ua(struct t10_alua_tg_pt_gp *tg_pt_gp)
core_scsi3_ua_allocate(se_deve, 0x2A,
ASCQ_2AH_ASYMMETRIC_ACCESS_STATE_CHANGED);
}
spin_unlock_bh(&lun->lun_deve_lock);
spin_unlock(&lun->lun_deve_lock);
spin_lock(&tg_pt_gp->tg_pt_gp_lock);
percpu_ref_put(&lun->lun_ref);

12
drivers/target/target_core_device.c
View File

@ -352,10 +352,10 @@ int core_enable_device_list_for_node(
hlist_add_head_rcu(&new->link, &nacl->lun_entry_hlist);
mutex_unlock(&nacl->lun_entry_mutex);
spin_lock_bh(&lun->lun_deve_lock);
spin_lock(&lun->lun_deve_lock);
list_del(&orig->lun_link);
list_add_tail(&new->lun_link, &lun->lun_deve_list);
spin_unlock_bh(&lun->lun_deve_lock);
spin_unlock(&lun->lun_deve_lock);
kref_put(&orig->pr_kref, target_pr_kref_release);
wait_for_completion(&orig->pr_comp);
@ -369,9 +369,9 @@ int core_enable_device_list_for_node(
hlist_add_head_rcu(&new->link, &nacl->lun_entry_hlist);
mutex_unlock(&nacl->lun_entry_mutex);
spin_lock_bh(&lun->lun_deve_lock);
spin_lock(&lun->lun_deve_lock);
list_add_tail(&new->lun_link, &lun->lun_deve_list);
spin_unlock_bh(&lun->lun_deve_lock);
spin_unlock(&lun->lun_deve_lock);
return 0;
}
@ -403,9 +403,9 @@ void core_disable_device_list_for_node(
* NodeACL context specific PR metadata for demo-mode
* MappedLUN *deve will be released below..
*/
spin_lock_bh(&lun->lun_deve_lock);
spin_lock(&lun->lun_deve_lock);
list_del(&orig->lun_link);
spin_unlock_bh(&lun->lun_deve_lock);
spin_unlock(&lun->lun_deve_lock);
/*
* Disable struct se_dev_entry LUN ACL mapping
*/

8
drivers/target/target_core_pr.c
View File

@ -709,7 +709,7 @@ static struct t10_pr_registration *__core_scsi3_alloc_registration(
continue;
spin_unlock(&dev->se_port_lock);
spin_lock_bh(&lun_tmp->lun_deve_lock);
spin_lock(&lun_tmp->lun_deve_lock);
list_for_each_entry(deve_tmp, &lun_tmp->lun_deve_list, lun_link) {
/*
* This pointer will be NULL for demo mode MappedLUNs
@ -742,7 +742,7 @@ static struct t10_pr_registration *__core_scsi3_alloc_registration(
continue;
kref_get(&deve_tmp->pr_kref);
spin_unlock_bh(&lun_tmp->lun_deve_lock);
spin_unlock(&lun_tmp->lun_deve_lock);
/*
* Grab a configfs group dependency that is released
* for the exception path at label out: below, or upon
@ -779,9 +779,9 @@ static struct t10_pr_registration *__core_scsi3_alloc_registration(
list_add_tail(&pr_reg_atp->pr_reg_atp_mem_list,
&pr_reg->pr_reg_atp_list);
spin_lock_bh(&lun_tmp->lun_deve_lock);
spin_lock(&lun_tmp->lun_deve_lock);
}
spin_unlock_bh(&lun_tmp->lun_deve_lock);
spin_unlock(&lun_tmp->lun_deve_lock);
spin_lock(&dev->se_port_lock);
percpu_ref_put(&lun_tmp->lun_ref);