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scsi: megaraid_sas: Add helper functions for irq_context

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Adding helper functions for ISR access and release to improve readability.

Link: https://lore.kernel.org/r/20210929124022.24605-3-sumit.saxena@broadcom.com
Signed-off-by: Sumit Saxena <sumit.saxena@broadcom.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Sumit Saxena 2021-09-29 18:10:21 +05:30 committed by Martin K. Petersen
parent e7dcc514a4
commit 4c32edc350
1 changed files with 39 additions and 6 deletions
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45
drivers/scsi/megaraid/megaraid_sas_fusion.c
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@ -3497,6 +3497,41 @@ megasas_complete_r1_command(struct megasas_instance *instance,
}
}
/**
* access_irq_context: Access to reply processing
* @irq_context: IRQ context
*
* Synchronize access to reply processing.
*
* Return: true on success, false on failure.
*/
static inline
bool access_irq_context(struct megasas_irq_context *irq_context)
{
if (!irq_context)
return true;
if (atomic_add_unless(&irq_context->in_used, 1, 1))
return true;
return false;
}
/**
* release_irq_context: Release reply processing
* @irq_context: IRQ context
*
* Release access of reply processing.
*
* Return: Nothing.
*/
static inline
void release_irq_context(struct megasas_irq_context *irq_context)
{
if (irq_context)
atomic_dec(&irq_context->in_used);
}
/**
* complete_cmd_fusion - Completes command
* @instance: Adapter soft state
@ -3530,7 +3565,7 @@ complete_cmd_fusion(struct megasas_instance *instance, u32 MSIxIndex,
if (atomic_read(&instance->adprecovery) == MEGASAS_HW_CRITICAL_ERROR)
return IRQ_HANDLED;
if (irq_context && !atomic_add_unless(&irq_context->in_used, 1, 1))
if (!access_irq_context(irq_context))
return 0;
desc = fusion->reply_frames_desc[MSIxIndex] +
@ -3544,8 +3579,7 @@ complete_cmd_fusion(struct megasas_instance *instance, u32 MSIxIndex,
MPI2_RPY_DESCRIPT_FLAGS_TYPE_MASK;
if (reply_descript_type == MPI2_RPY_DESCRIPT_FLAGS_UNUSED) {
if (irq_context)
atomic_dec(&irq_context->in_used);
release_irq_context(irq_context);
return IRQ_NONE;
}
@ -3663,7 +3697,7 @@ complete_cmd_fusion(struct megasas_instance *instance, u32 MSIxIndex,
irq_context->irq_line_enable = true;
irq_poll_sched(&irq_context->irqpoll);
}
atomic_dec(&irq_context->in_used);
release_irq_context(irq_context);
return num_completed;
}
}
@ -3682,8 +3716,7 @@ complete_cmd_fusion(struct megasas_instance *instance, u32 MSIxIndex,
megasas_check_and_restore_queue_depth(instance);
}
if (irq_context)
atomic_dec(&irq_context->in_used);
release_irq_context(irq_context);
return num_completed;
}