From bdaefbf580cd200ae3230b6aacd1f4f2dadb18e3 Mon Sep 17 00:00:00 2001 From: Santosh Nayak Date: Sun, 26 Feb 2012 19:03:30 +0530 Subject: [SCSI] pm8001: Fix bogus interrupt state flag issue. Static checker is giving following warning: " error: calling 'spin_unlock_irqrestore()' with bogus flags" The code flow is as shown below: process_oq() --> process_one_iomb --> mpi_sata_completion In 'mpi_sata_completion' the first call for 'spin_unlock_irqrestore()' is with flags=0, which is as good as 'spin_unlock_irq()' ( unconditional interrupt enabling). So for better performance 'spin_unlock_irqrestore()' can be replaced with 'spin_unlock_irq()' and 'spin_lock_irqsave()' can be replaced by 'spin_lock_irq()'. Signed-off-by: Santosh Nayak Acked-by: Jack Wang Signed-off-by: James Bottomley --- drivers/scsi/pm8001/pm8001_hwi.c | 58 +++++++++++++++++++--------------------- 1 file changed, 28 insertions(+), 30 deletions(-) diff --git a/drivers/scsi/pm8001/pm8001_hwi.c b/drivers/scsi/pm8001/pm8001_hwi.c index 3920b49f4f57..871d1c3fa01b 100644 --- a/drivers/scsi/pm8001/pm8001_hwi.c +++ b/drivers/scsi/pm8001/pm8001_hwi.c @@ -2082,7 +2082,6 @@ mpi_sata_completion(struct pm8001_hba_info *pm8001_ha, void *piomb) { struct sas_task *t; struct pm8001_ccb_info *ccb; - unsigned long flags = 0; u32 param; u32 status; u32 tag; @@ -2221,9 +2220,9 @@ mpi_sata_completion(struct pm8001_hba_info *pm8001_ha, void *piomb) ts->stat = SAS_QUEUE_FULL; pm8001_ccb_task_free(pm8001_ha, t, ccb, tag); mb();/*in order to force CPU ordering*/ - spin_unlock_irqrestore(&pm8001_ha->lock, flags); + spin_unlock_irq(&pm8001_ha->lock); t->task_done(t); - spin_lock_irqsave(&pm8001_ha->lock, flags); + spin_lock_irq(&pm8001_ha->lock); return; } break; @@ -2241,9 +2240,9 @@ mpi_sata_completion(struct pm8001_hba_info *pm8001_ha, void *piomb) ts->stat = SAS_QUEUE_FULL; pm8001_ccb_task_free(pm8001_ha, t, ccb, tag); mb();/*ditto*/ - spin_unlock_irqrestore(&pm8001_ha->lock, flags); + spin_unlock_irq(&pm8001_ha->lock); t->task_done(t); - spin_lock_irqsave(&pm8001_ha->lock, flags); + spin_lock_irq(&pm8001_ha->lock); return; } break; @@ -2269,9 +2268,9 @@ mpi_sata_completion(struct pm8001_hba_info *pm8001_ha, void *piomb) ts->stat = SAS_QUEUE_FULL; pm8001_ccb_task_free(pm8001_ha, t, ccb, tag); mb();/* ditto*/ - spin_unlock_irqrestore(&pm8001_ha->lock, flags); + spin_unlock_irq(&pm8001_ha->lock); t->task_done(t); - spin_lock_irqsave(&pm8001_ha->lock, flags); + spin_lock_irq(&pm8001_ha->lock); return; } break; @@ -2336,9 +2335,9 @@ mpi_sata_completion(struct pm8001_hba_info *pm8001_ha, void *piomb) ts->stat = SAS_QUEUE_FULL; pm8001_ccb_task_free(pm8001_ha, t, ccb, tag); mb();/*ditto*/ - spin_unlock_irqrestore(&pm8001_ha->lock, flags); + spin_unlock_irq(&pm8001_ha->lock); t->task_done(t); - spin_lock_irqsave(&pm8001_ha->lock, flags); + spin_lock_irq(&pm8001_ha->lock); return; } break; @@ -2360,9 +2359,9 @@ mpi_sata_completion(struct pm8001_hba_info *pm8001_ha, void *piomb) ts->stat = SAS_QUEUE_FULL; pm8001_ccb_task_free(pm8001_ha, t, ccb, tag); mb();/*ditto*/ - spin_unlock_irqrestore(&pm8001_ha->lock, flags); + spin_unlock_irq(&pm8001_ha->lock); t->task_done(t); - spin_lock_irqsave(&pm8001_ha->lock, flags); + spin_lock_irq(&pm8001_ha->lock); return; } break; @@ -2380,31 +2379,31 @@ mpi_sata_completion(struct pm8001_hba_info *pm8001_ha, void *piomb) ts->stat = SAS_DEV_NO_RESPONSE; break; } - spin_lock_irqsave(&t->task_state_lock, flags); + spin_lock_irq(&t->task_state_lock); t->task_state_flags &= ~SAS_TASK_STATE_PENDING; t->task_state_flags &= ~SAS_TASK_AT_INITIATOR; t->task_state_flags |= SAS_TASK_STATE_DONE; if (unlikely((t->task_state_flags & SAS_TASK_STATE_ABORTED))) { - spin_unlock_irqrestore(&t->task_state_lock, flags); + spin_unlock_irq(&t->task_state_lock); PM8001_FAIL_DBG(pm8001_ha, pm8001_printk("task 0x%p done with io_status 0x%x" " resp 0x%x stat 0x%x but aborted by upper layer!\n", t, status, ts->resp, ts->stat)); pm8001_ccb_task_free(pm8001_ha, t, ccb, tag); } else if (t->uldd_task) { - spin_unlock_irqrestore(&t->task_state_lock, flags); + spin_unlock_irq(&t->task_state_lock); pm8001_ccb_task_free(pm8001_ha, t, ccb, tag); mb();/* ditto */ - spin_unlock_irqrestore(&pm8001_ha->lock, flags); + spin_unlock_irq(&pm8001_ha->lock); t->task_done(t); - spin_lock_irqsave(&pm8001_ha->lock, flags); + spin_lock_irq(&pm8001_ha->lock); } else if (!t->uldd_task) { - spin_unlock_irqrestore(&t->task_state_lock, flags); + spin_unlock_irq(&t->task_state_lock); pm8001_ccb_task_free(pm8001_ha, t, ccb, tag); mb();/*ditto*/ - spin_unlock_irqrestore(&pm8001_ha->lock, flags); + spin_unlock_irq(&pm8001_ha->lock); t->task_done(t); - spin_lock_irqsave(&pm8001_ha->lock, flags); + spin_lock_irq(&pm8001_ha->lock); } } @@ -2412,7 +2411,6 @@ mpi_sata_completion(struct pm8001_hba_info *pm8001_ha, void *piomb) static void mpi_sata_event(struct pm8001_hba_info *pm8001_ha , void *piomb) { struct sas_task *t; - unsigned long flags = 0; struct task_status_struct *ts; struct pm8001_ccb_info *ccb; struct pm8001_device *pm8001_dev; @@ -2492,9 +2490,9 @@ static void mpi_sata_event(struct pm8001_hba_info *pm8001_ha , void *piomb) ts->stat = SAS_QUEUE_FULL; pm8001_ccb_task_free(pm8001_ha, t, ccb, tag); mb();/*ditto*/ - spin_unlock_irqrestore(&pm8001_ha->lock, flags); + spin_unlock_irq(&pm8001_ha->lock); t->task_done(t); - spin_lock_irqsave(&pm8001_ha->lock, flags); + spin_lock_irq(&pm8001_ha->lock); return; } break; @@ -2592,31 +2590,31 @@ static void mpi_sata_event(struct pm8001_hba_info *pm8001_ha , void *piomb) ts->stat = SAS_OPEN_TO; break; } - spin_lock_irqsave(&t->task_state_lock, flags); + spin_lock_irq(&t->task_state_lock); t->task_state_flags &= ~SAS_TASK_STATE_PENDING; t->task_state_flags &= ~SAS_TASK_AT_INITIATOR; t->task_state_flags |= SAS_TASK_STATE_DONE; if (unlikely((t->task_state_flags & SAS_TASK_STATE_ABORTED))) { - spin_unlock_irqrestore(&t->task_state_lock, flags); + spin_unlock_irq(&t->task_state_lock); PM8001_FAIL_DBG(pm8001_ha, pm8001_printk("task 0x%p done with io_status 0x%x" " resp 0x%x stat 0x%x but aborted by upper layer!\n", t, event, ts->resp, ts->stat)); pm8001_ccb_task_free(pm8001_ha, t, ccb, tag); } else if (t->uldd_task) { - spin_unlock_irqrestore(&t->task_state_lock, flags); + spin_unlock_irq(&t->task_state_lock); pm8001_ccb_task_free(pm8001_ha, t, ccb, tag); mb();/* ditto */ - spin_unlock_irqrestore(&pm8001_ha->lock, flags); + spin_unlock_irq(&pm8001_ha->lock); t->task_done(t); - spin_lock_irqsave(&pm8001_ha->lock, flags); + spin_lock_irq(&pm8001_ha->lock); } else if (!t->uldd_task) { - spin_unlock_irqrestore(&t->task_state_lock, flags); + spin_unlock_irq(&t->task_state_lock); pm8001_ccb_task_free(pm8001_ha, t, ccb, tag); mb();/*ditto*/ - spin_unlock_irqrestore(&pm8001_ha->lock, flags); + spin_unlock_irq(&pm8001_ha->lock); t->task_done(t); - spin_lock_irqsave(&pm8001_ha->lock, flags); + spin_lock_irq(&pm8001_ha->lock); } } -- cgit v1.2.3