isci: fix hang after target reset
When aborting a task context we need to be sure that the hardware has acted on this request (retrieved the task context) before invalidating the remote node context. In the case of the "dummy" task context and remote node we do not have the full state machine that goes through the complete tc abort and rnc invalidate states. Instead we ensure the hardware has seen and acted on Signed-off-by: Jacek Danecki <Jacek.Danecki@intel.com> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
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@ -1673,12 +1673,6 @@ static void scic_sds_port_ready_substate_waiting_enter(
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scic_sds_port_suspend_port_task_scheduler(this_port);
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/* Kill the dummy task for this port if it has not yet posted
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* the hardware will treat this as a NOP and just return abort
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* complete.
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*/
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scic_sds_port_abort_dummy_request(this_port);
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this_port->not_ready_reason = SCIC_PORT_NOT_READY_NO_ACTIVE_PHYS;
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if (this_port->active_phy_mask != 0) {
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@ -1744,6 +1738,13 @@ static void scic_sds_port_ready_substate_operational_exit(
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{
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struct scic_sds_port *this_port = (struct scic_sds_port *)object;
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/*
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* Kill the dummy task for this port if it has not yet posted
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* the hardware will treat this as a NOP and just return abort
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* complete.
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*/
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scic_sds_port_abort_dummy_request(this_port);
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isci_event_port_not_ready(
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scic_sds_port_get_controller(this_port),
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this_port,
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@ -2643,6 +2644,13 @@ void scic_sds_port_invalidate_dummy_remote_node(struct scic_sds_port *sci_port)
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rnc->ssp.is_valid = false;
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/* ensure the preceding tc abort request has reached the
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* controller and give it ample time to act before posting the rnc
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* invalidate
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*/
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SMU_ISR_READ(scic); /* flush */
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udelay(10);
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command = SCU_CONTEXT_COMMAND_POST_RNC_INVALIDATE |
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phys_index << SCU_CONTEXT_COMMAND_LOGICAL_PORT_SHIFT | rni;
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