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| author | Roland Dreier <roland@purestorage.com> | 2011-07-20 09:28:56 +0000 |
|---|---|---|
| committer | Nicholas Bellinger <nab@linux-iscsi.org> | 2011-07-22 09:37:45 +0000 |
| commit | 5e1be919820175a2becc3c72051050aaa3fae954 (patch) | |
| tree | 50b987bb753e481fd0d921e5723deacd17f5a97f /drivers/target/target_core_device.c | |
| parent | 56e34ee2adb59a35bfa5714bdf4dcb3f4d14a41d (diff) | |
| download | linux-5e1be919820175a2becc3c72051050aaa3fae954.tar.gz linux-5e1be919820175a2becc3c72051050aaa3fae954.tar.xz linux-5e1be919820175a2becc3c72051050aaa3fae954.zip | |
target: Make se_tmr_lock IRQ-safe
transport_lookup_tmr_lun() can be called from interrupt context and
therefore needs to use IRQ-safe spinlock functions. Fix this up, and
to make the locking work, convert the other uses of se_tmr_lock to be
IRQ-disabling.
Signed-off-by: Roland Dreier <roland@purestorage.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
Diffstat (limited to 'drivers/target/target_core_device.c')
| -rw-r--r-- | drivers/target/target_core_device.c | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/drivers/target/target_core_device.c b/drivers/target/target_core_device.c index 6d93d9684cfc..f13e2941936c 100644 --- a/drivers/target/target_core_device.c +++ b/drivers/target/target_core_device.c @@ -181,6 +181,7 @@ int transport_lookup_tmr_lun(struct se_cmd *se_cmd, u32 unpacked_lun) struct se_lun *se_lun = NULL; struct se_session *se_sess = se_cmd->se_sess; struct se_tmr_req *se_tmr = se_cmd->se_tmr_req; + unsigned long flags; if (unpacked_lun >= TRANSPORT_MAX_LUNS_PER_TPG) { se_cmd->scsi_sense_reason = TCM_NON_EXISTENT_LUN; @@ -188,7 +189,7 @@ int transport_lookup_tmr_lun(struct se_cmd *se_cmd, u32 unpacked_lun) return -ENODEV; } - spin_lock_irq(&se_sess->se_node_acl->device_list_lock); + spin_lock_irqsave(&se_sess->se_node_acl->device_list_lock, flags); se_cmd->se_deve = &se_sess->se_node_acl->device_list[unpacked_lun]; deve = se_cmd->se_deve; @@ -200,7 +201,7 @@ int transport_lookup_tmr_lun(struct se_cmd *se_cmd, u32 unpacked_lun) se_cmd->orig_fe_lun = unpacked_lun; se_cmd->se_orig_obj_ptr = se_cmd->se_dev; } - spin_unlock_irq(&se_sess->se_node_acl->device_list_lock); + spin_unlock_irqrestore(&se_sess->se_node_acl->device_list_lock, flags); if (!se_lun) { printk(KERN_INFO "TARGET_CORE[%s]: Detected NON_EXISTENT_LUN" @@ -223,9 +224,9 @@ int transport_lookup_tmr_lun(struct se_cmd *se_cmd, u32 unpacked_lun) se_cmd->se_dev = se_lun->lun_se_dev; se_tmr->tmr_dev = se_lun->lun_se_dev; - spin_lock(&se_tmr->tmr_dev->se_tmr_lock); + spin_lock_irqsave(&se_tmr->tmr_dev->se_tmr_lock, flags); list_add_tail(&se_tmr->tmr_list, &se_tmr->tmr_dev->dev_tmr_list); - spin_unlock(&se_tmr->tmr_dev->se_tmr_lock); + spin_unlock_irqrestore(&se_tmr->tmr_dev->se_tmr_lock, flags); return 0; } |