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scsi: megaraid_sas: Remove spin lock for dpc operation 

Optimization: No need to hold hba_lock in dpc context for reading atomic
variable.

Signed-off-by: Shivasharan S <shivasharan.srikanteshwara@broadcom.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Shivasharan S 2018-10-16 23:37:50 -07:00 committed by Martin K. Petersen
parent 9e77018eef
commit 34bd9f27e3
1 changed files with 1 additions and 6 deletions
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7
drivers/scsi/megaraid/megaraid_sas_fusion.c
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@ -3573,18 +3573,13 @@ megasas_complete_cmd_dpc_fusion(unsigned long instance_addr)
{ {
struct megasas_instance *instance = struct megasas_instance *instance =
(struct megasas_instance *)instance_addr; (struct megasas_instance *)instance_addr;
unsigned long flags;
u32 count, MSIxIndex; u32 count, MSIxIndex;
count = instance->msix_vectors > 0 ? instance->msix_vectors : 1; count = instance->msix_vectors > 0 ? instance->msix_vectors : 1;
/* If we have already declared adapter dead, donot complete cmds */ /* If we have already declared adapter dead, donot complete cmds */
spin_lock_irqsave(&instance->hba_lock, flags); if (atomic_read(&instance->adprecovery) == MEGASAS_HW_CRITICAL_ERROR)
if (atomic_read(&instance->adprecovery) == MEGASAS_HW_CRITICAL_ERROR) {
spin_unlock_irqrestore(&instance->hba_lock, flags);
return; return;
}
spin_unlock_irqrestore(&instance->hba_lock, flags);
for (MSIxIndex = 0 ; MSIxIndex < count; MSIxIndex++) for (MSIxIndex = 0 ; MSIxIndex < count; MSIxIndex++)
complete_cmd_fusion(instance, MSIxIndex); complete_cmd_fusion(instance, MSIxIndex);