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mpt3sas: Used "synchronize_irq()"API to synchronize timed-out IO & TMs 

Replaced mpt3sas_base_flush_reply_queues() with
mpt3sas_base_sync_reply_irqs(),as mpt3sas_base_flush_reply_queues()
skips over reply queues that are currently busy (i.e. being handled by
interrupt processing in another core). If a reply queue is busy, then
call to synchronize_irq()in mpt3sas_base_sync_reply_irqs()make sures the
other core has finished flushing the queue and completed any calls to
the mid-layer scsi_done() routine.

Signed-off-by: Chaitra P B <chaitra.basappa@broadcom.com>
Reviewed-by: Tomas Henzl <thenzl@redhat.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Chaitra P B 2016-05-06 14:29:31 +05:30 committed by Martin K. Petersen
parent 6c19709384
commit 5f0dfb7a9b
3 changed files with 12 additions and 10 deletions
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15
drivers/scsi/mpt3sas/mpt3sas_base.c
View File

@ -1104,18 +1104,16 @@ _base_is_controller_msix_enabled(struct MPT3SAS_ADAPTER *ioc)
}
/**
* mpt3sas_base_flush_reply_queues - flushing the MSIX reply queues
* mpt3sas_base_sync_reply_irqs - flush pending MSIX interrupts
* @ioc: per adapter object
* Context: ISR conext
* Context: non ISR conext
*
* Called when a Task Management request has completed. We want
* to flush the other reply queues so all the outstanding IO has been
* completed back to OS before we process the TM completetion.
* Called when a Task Management request has completed.
*
* Return nothing.
*/
void
mpt3sas_base_flush_reply_queues(struct MPT3SAS_ADAPTER *ioc)
mpt3sas_base_sync_reply_irqs(struct MPT3SAS_ADAPTER *ioc)
{
struct adapter_reply_queue *reply_q;
@ -1126,12 +1124,13 @@ mpt3sas_base_flush_reply_queues(struct MPT3SAS_ADAPTER *ioc)
return;
list_for_each_entry(reply_q, &ioc->reply_queue_list, list) {
if (ioc->shost_recovery)
if (ioc->shost_recovery || ioc->remove_host ||
ioc->pci_error_recovery)
return;
/* TMs are on msix_index == 0 */
if (reply_q->msix_index == 0)
continue;
_base_interrupt(reply_q->vector, (void *)reply_q);
synchronize_irq(reply_q->vector);
}
}

3
drivers/scsi/mpt3sas/mpt3sas_base.h
View File

@ -1236,7 +1236,8 @@ void *mpt3sas_base_get_msg_frame(struct MPT3SAS_ADAPTER *ioc, u16 smid);
void *mpt3sas_base_get_sense_buffer(struct MPT3SAS_ADAPTER *ioc, u16 smid);
__le32 mpt3sas_base_get_sense_buffer_dma(struct MPT3SAS_ADAPTER *ioc,
u16 smid);
void mpt3sas_base_flush_reply_queues(struct MPT3SAS_ADAPTER *ioc);
void mpt3sas_base_sync_reply_irqs(struct MPT3SAS_ADAPTER *ioc);
/* hi-priority queue */
u16 mpt3sas_base_get_smid_hpr(struct MPT3SAS_ADAPTER *ioc, u8 cb_idx);

4
drivers/scsi/mpt3sas/mpt3sas_scsih.c
View File

@ -2124,7 +2124,6 @@ _scsih_tm_done(struct MPT3SAS_ADAPTER *ioc, u16 smid, u8 msix_index, u32 reply)
return 1;
if (ioc->tm_cmds.smid != smid)
return 1;
mpt3sas_base_flush_reply_queues(ioc);
ioc->tm_cmds.status |= MPT3_CMD_COMPLETE;
mpi_reply = mpt3sas_base_get_reply_virt_addr(ioc, reply);
if (mpi_reply) {
@ -2309,6 +2308,9 @@ mpt3sas_scsih_issue_tm(struct MPT3SAS_ADAPTER *ioc, u16 handle, uint channel,
}
}
/* sync IRQs in case those were busy during flush. */
mpt3sas_base_sync_reply_irqs(ioc);
if (ioc->tm_cmds.status & MPT3_CMD_REPLY_VALID) {
mpt3sas_trigger_master(ioc, MASTER_TRIGGER_TASK_MANAGMENT);
mpi_reply = ioc->tm_cmds.reply;