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hpsa: do not use function pointers in fast path command submission 

Performance tweak, avoid unnecessary function calls.

Reviewed-by: Scott Teel <scott.teel@pmcs.com>
Signed-off-by: Don Brace <don.brace@pmcs.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
Stephen Cameron 2015-01-23 16:44:40 -06:00 committed by James Bottomley
parent f42e81e156
commit c05e8866a1
2 changed files with 6 additions and 7 deletions
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8
drivers/scsi/hpsa.c
View File

@ -821,19 +821,21 @@ static void dial_up_lockup_detection_on_fw_flash_complete(struct ctlr_info *h,
static void enqueue_cmd_and_start_io(struct ctlr_info *h,
struct CommandList *c)
{
dial_down_lockup_detection_during_fw_flash(h, c);
atomic_inc(&h->commands_outstanding);
switch (c->cmd_type) {
case CMD_IOACCEL1:
set_ioaccel1_performant_mode(h, c);
writel(c->busaddr, h->vaddr + SA5_REQUEST_PORT_OFFSET);
break;
case CMD_IOACCEL2:
set_ioaccel2_performant_mode(h, c);
writel(c->busaddr, h->vaddr + IOACCEL2_INBOUND_POSTQ_32);
break;
default:
set_performant_mode(h, c);
h->access.submit_command(h, c);
}
dial_down_lockup_detection_during_fw_flash(h, c);
atomic_inc(&h->commands_outstanding);
h->access.submit_command(h, c);
}
static inline int is_hba_lunid(unsigned char scsi3addr[])

5
drivers/scsi/hpsa.h
View File

@ -367,10 +367,7 @@ static void SA5_submit_command_no_read(struct ctlr_info *h,
static void SA5_submit_command_ioaccel2(struct ctlr_info *h,
struct CommandList *c)
{
if (c->cmd_type == CMD_IOACCEL2)
writel(c->busaddr, h->vaddr + IOACCEL2_INBOUND_POSTQ_32);
else
writel(c->busaddr, h->vaddr + SA5_REQUEST_PORT_OFFSET);
writel(c->busaddr, h->vaddr + SA5_REQUEST_PORT_OFFSET);
}
/*