[SCSI] hpsa: only do device rescan for certain events
Do no rescan on every events -- way too many rescans are triggered if we don't filter the events. Limit rescans to be triggered by the following set of events: * controller state change * enclosure hot plug * physical drive state change * logical drive state change * redundant controller state change * accelerated io enabled/disabled * accelerated io configuration change Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com> Signed-off-by: James Bottomley <JBottomley@Parallels.com>
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@ -6419,7 +6419,7 @@ static void hpsa_ctlr_needs_rescan(struct ctlr_info *h)
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return;
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return;
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h->events = readl(&(h->cfgtable->event_notify));
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h->events = readl(&(h->cfgtable->event_notify));
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if (!h->events && !h->drv_req_rescan)
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if (!(h->events & RESCAN_REQUIRED_EVENT_BITS) && !h->drv_req_rescan)
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return;
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return;
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/*
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/*
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@ -181,6 +181,22 @@ struct ctlr_info {
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#define HPSATMF_LOG_QRY_TSET (1 << 24)
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#define HPSATMF_LOG_QRY_TSET (1 << 24)
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#define HPSATMF_LOG_QRY_ASYNC (1 << 25)
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#define HPSATMF_LOG_QRY_ASYNC (1 << 25)
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u32 events;
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u32 events;
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#define CTLR_STATE_CHANGE_EVENT (1 << 0)
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#define CTLR_ENCLOSURE_HOT_PLUG_EVENT (1 << 1)
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#define CTLR_STATE_CHANGE_EVENT_PHYSICAL_DRV (1 << 4)
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#define CTLR_STATE_CHANGE_EVENT_LOGICAL_DRV (1 << 5)
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#define CTLR_STATE_CHANGE_EVENT_REDUNDANT_CNTRL (1 << 6)
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#define CTLR_STATE_CHANGE_EVENT_AIO_ENABLED_DISABLED (1 << 30)
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#define CTLR_STATE_CHANGE_EVENT_AIO_CONFIG_CHANGE (1 << 31)
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#define RESCAN_REQUIRED_EVENT_BITS \
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(CTLR_STATE_CHANGE_EVENT | \
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CTLR_ENCLOSURE_HOT_PLUG_EVENT | \
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CTLR_STATE_CHANGE_EVENT_PHYSICAL_DRV | \
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CTLR_STATE_CHANGE_EVENT_LOGICAL_DRV | \
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CTLR_STATE_CHANGE_EVENT_REDUNDANT_CNTRL | \
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CTLR_STATE_CHANGE_EVENT_AIO_ENABLED_DISABLED | \
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CTLR_STATE_CHANGE_EVENT_AIO_CONFIG_CHANGE)
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int acciopath_status;
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int acciopath_status;
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int drv_req_rescan; /* flag for driver to request rescan event */
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int drv_req_rescan; /* flag for driver to request rescan event */
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};
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};
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