From: Greg KH <[email protected]> 3.5-stable review patch. If anyone has any objections, please let me know.
------------------ From: Paolo Bonzini <[email protected]> commit 27a2709912ac19c755d34c79fe11994b0bf8082b upstream. The error conditions in transport_get_sense_data are superfluous and complicate the code unnecessarily: * SCF_TRANSPORT_TASK_SENSE is checked in the caller; * it's simply part of the invariants of dev->transport->get_sense_buffer that it must be there if transport_complete ever returns 1, and that it must not return NULL. Besides, the entire callback will disappear with the next patch. * similarly in the caller we can expect that sense data is only sent for non-zero cmd->scsi_status. Signed-off-by: Paolo Bonzini <[email protected]> Signed-off-by: Nicholas Bellinger <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]> --- drivers/target/target_core_transport.c | 49 ++++++++------------------------- 1 file changed, 13 insertions(+), 36 deletions(-) --- a/drivers/target/target_core_transport.c +++ b/drivers/target/target_core_transport.c @@ -2261,7 +2261,7 @@ out: /* * Used to obtain Sense Data from underlying Linux/SCSI struct scsi_cmnd */ -static int transport_get_sense_data(struct se_cmd *cmd) +static void transport_get_sense_data(struct se_cmd *cmd) { unsigned char *buffer = cmd->sense_buffer, *sense_buffer = NULL; struct se_device *dev = cmd->se_dev; @@ -2271,30 +2271,15 @@ static int transport_get_sense_data(stru WARN_ON(!cmd->se_lun); if (!dev) - return 0; + return; spin_lock_irqsave(&cmd->t_state_lock, flags); if (cmd->se_cmd_flags & SCF_SENT_CHECK_CONDITION) { spin_unlock_irqrestore(&cmd->t_state_lock, flags); - return 0; - } - - if (!(cmd->se_cmd_flags & SCF_TRANSPORT_TASK_SENSE)) - goto out; - - if (!dev->transport->get_sense_buffer) { - pr_err("dev->transport->get_sense_buffer is NULL\n"); - goto out; + return; } sense_buffer = dev->transport->get_sense_buffer(cmd); - if (!sense_buffer) { - pr_err("ITT 0x%08x cmd %p: Unable to locate" - " sense buffer for task with sense\n", - cmd->se_tfo->get_task_tag(cmd), cmd); - goto out; - } - spin_unlock_irqrestore(&cmd->t_state_lock, flags); offset = cmd->se_tfo->set_fabric_sense_len(cmd, TRANSPORT_SENSE_BUFFER); @@ -2306,11 +2291,6 @@ static int transport_get_sense_data(stru pr_debug("HBA_[%u]_PLUG[%s]: Set SAM STATUS: 0x%02x and sense\n", dev->se_hba->hba_id, dev->transport->name, cmd->scsi_status); - return 0; - -out: - spin_unlock_irqrestore(&cmd->t_state_lock, flags); - return -1; } static inline long long transport_dev_end_lba(struct se_device *dev) @@ -3171,7 +3151,7 @@ static void transport_handle_queue_full( static void target_complete_ok_work(struct work_struct *work) { struct se_cmd *cmd = container_of(work, struct se_cmd, work); - int reason = 0, ret; + int ret; /* * Check if we need to move delayed/dormant tasks from cmds on the @@ -3192,19 +3172,16 @@ static void target_complete_ok_work(stru * the struct se_cmd in question. */ if (cmd->se_cmd_flags & SCF_TRANSPORT_TASK_SENSE) { - if (transport_get_sense_data(cmd) < 0) - reason = TCM_NON_EXISTENT_LUN; + WARN_ON(!cmd->scsi_status); + transport_get_sense_data(cmd); + ret = transport_send_check_condition_and_sense( + cmd, 0, 1); + if (ret == -EAGAIN || ret == -ENOMEM) + goto queue_full; - if (cmd->scsi_status) { - ret = transport_send_check_condition_and_sense( - cmd, reason, 1); - if (ret == -EAGAIN || ret == -ENOMEM) - goto queue_full; - - transport_lun_remove_cmd(cmd); - transport_cmd_check_stop_to_fabric(cmd); - return; - } + transport_lun_remove_cmd(cmd); + transport_cmd_check_stop_to_fabric(cmd); + return; } /* * Check for a callback, used by amongst other things -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
