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scsi: mpt3sas: Remove usage of device_busy counter

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Remove usage of device_busy counter from driver. Instead of device_busy
counter now driver uses 'nr_active' counter of request_queue to get the
number of inflight request for a LUN.

Link: https://lore.kernel.org/r/20191226111333.26131-10-sreekanth.reddy@broadcom.com
Signed-off-by: Sreekanth Reddy <sreekanth.reddy@broadcom.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Sreekanth Reddy 2019-12-26 06:13:32 -05:00 committed by Martin K. Petersen
parent c6bdb6a108
commit c50ed99cd5
1 changed files with 17 additions and 1 deletions
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18
drivers/scsi/mpt3sas/mpt3sas_base.c
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@ -3573,6 +3573,22 @@ _base_get_msix_index(struct MPT3SAS_ADAPTER *ioc,
return ioc->cpu_msix_table[raw_smp_processor_id()]; return ioc->cpu_msix_table[raw_smp_processor_id()];
} }
/**
* _base_sdev_nr_inflight_request -get number of inflight requests
* of a request queue.
* @q: request_queue object
*
* returns number of inflight request of a request queue.
*/
inline unsigned long
_base_sdev_nr_inflight_request(struct request_queue *q)
{
struct blk_mq_hw_ctx *hctx = q->queue_hw_ctx[0];
return atomic_read(&hctx->nr_active);
}
/** /**
* _base_get_high_iops_msix_index - get the msix index of * _base_get_high_iops_msix_index - get the msix index of
* high iops queues * high iops queues
@ -3592,7 +3608,7 @@ _base_get_high_iops_msix_index(struct MPT3SAS_ADAPTER *ioc,
* reply queues in terms of batch count 16 when outstanding * reply queues in terms of batch count 16 when outstanding
* IOs on the target device is >=8. * IOs on the target device is >=8.
*/ */
if (atomic_read(&scmd->device->device_busy) > if (_base_sdev_nr_inflight_request(scmd->device->request_queue) >
MPT3SAS_DEVICE_HIGH_IOPS_DEPTH) MPT3SAS_DEVICE_HIGH_IOPS_DEPTH)
return base_mod64(( return base_mod64((
atomic64_add_return(1, &ioc->high_iops_outstanding) / atomic64_add_return(1, &ioc->high_iops_outstanding) /