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[SCSI] qla2xxx: Remove unnecessary spinlock primitive - mbx_reg_lock. 

Since, mailbox commands are executed in a synchronous
manner, there is no need to have a separate spinlock
primitive to protect data/register access shared by callers.

Signed-off-by: Seokmann Ju <seokmann.ju@qlogic.com>
Signed-off-by: Andrew Vasquez <andrew.vasquez@qlogic.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
This commit is contained in:
Seokmann Ju 2007-01-29 10:22:30 -08:00 committed by James Bottomley
parent 7c98a046b7
commit 03c79cc56e
4 changed files with 0 additions and 42 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/scsi/qla2xxx/qla_def.h
View File

@ -2338,8 +2338,6 @@ typedef struct scsi_qla_host {
#define MBX_INTR_WAIT 2
#define MBX_UPDATE_FLASH_ACTIVE 3
spinlock_t mbx_reg_lock; /* Mbx Cmd Register Lock */
struct semaphore mbx_cmd_sem; /* Serialialize mbx access */
struct semaphore mbx_intr_sem; /* Used for completion notification */

16
drivers/scsi/qla2xxx/qla_isr.c
View File

@ -86,12 +86,8 @@ qla2100_intr_handler(int irq, void *dev_id)
if (test_bit(MBX_INTR_WAIT, &ha->mbx_cmd_flags) &&
(status & MBX_INTERRUPT) && ha->flags.mbox_int) {
spin_lock_irqsave(&ha->mbx_reg_lock, flags);
set_bit(MBX_INTERRUPT, &ha->mbx_cmd_flags);
up(&ha->mbx_intr_sem);
spin_unlock_irqrestore(&ha->mbx_reg_lock, flags);
}
return (IRQ_HANDLED);
@ -197,12 +193,8 @@ qla2300_intr_handler(int irq, void *dev_id)
if (test_bit(MBX_INTR_WAIT, &ha->mbx_cmd_flags) &&
(status & MBX_INTERRUPT) && ha->flags.mbox_int) {
spin_lock_irqsave(&ha->mbx_reg_lock, flags);
set_bit(MBX_INTERRUPT, &ha->mbx_cmd_flags);
up(&ha->mbx_intr_sem);
spin_unlock_irqrestore(&ha->mbx_reg_lock, flags);
}
return (IRQ_HANDLED);
@ -1491,12 +1483,8 @@ qla24xx_intr_handler(int irq, void *dev_id)
if (test_bit(MBX_INTR_WAIT, &ha->mbx_cmd_flags) &&
(status & MBX_INTERRUPT) && ha->flags.mbox_int) {
spin_lock_irqsave(&ha->mbx_reg_lock, flags);
set_bit(MBX_INTERRUPT, &ha->mbx_cmd_flags);
up(&ha->mbx_intr_sem);
spin_unlock_irqrestore(&ha->mbx_reg_lock, flags);
}
return IRQ_HANDLED;
@ -1629,12 +1617,8 @@ qla24xx_msix_default(int irq, void *dev_id)
if (test_bit(MBX_INTR_WAIT, &ha->mbx_cmd_flags) &&
(status & MBX_INTERRUPT) && ha->flags.mbox_int) {
spin_lock_irqsave(&ha->mbx_reg_lock, flags);
set_bit(MBX_INTERRUPT, &ha->mbx_cmd_flags);
up(&ha->mbx_intr_sem);
spin_unlock_irqrestore(&ha->mbx_reg_lock, flags);
}
return IRQ_HANDLED;

16
drivers/scsi/qla2xxx/qla_mbx.c
View File

@ -55,7 +55,6 @@ qla2x00_mailbox_command(scsi_qla_host_t *ha, mbx_cmd_t *mcp)
uint16_t __iomem *optr;
uint32_t cnt;
uint32_t mboxes;
unsigned long mbx_flags = 0;
unsigned long wait_time;
rval = QLA_SUCCESS;
@ -81,10 +80,6 @@ qla2x00_mailbox_command(scsi_qla_host_t *ha, mbx_cmd_t *mcp)
/* Save mailbox command for debug */
ha->mcp = mcp;
/* Try to get mailbox register access */
if (!abort_active)
spin_lock_irqsave(&ha->mbx_reg_lock, mbx_flags);
DEBUG11(printk("scsi(%ld): prepare to issue mbox cmd=0x%x.\n",
ha->host_no, mcp->mb[0]));
@ -161,9 +156,6 @@ qla2x00_mailbox_command(scsi_qla_host_t *ha, mbx_cmd_t *mcp)
WRT_REG_WORD(&reg->isp.hccr, HCCR_SET_HOST_INT);
spin_unlock_irqrestore(&ha->hardware_lock, flags);
if (!abort_active)
spin_unlock_irqrestore(&ha->mbx_reg_lock, mbx_flags);
/* Wait for either the timer to expire
* or the mbox completion interrupt
*/
@ -184,8 +176,6 @@ qla2x00_mailbox_command(scsi_qla_host_t *ha, mbx_cmd_t *mcp)
else
WRT_REG_WORD(&reg->isp.hccr, HCCR_SET_HOST_INT);
spin_unlock_irqrestore(&ha->hardware_lock, flags);
if (!abort_active)
spin_unlock_irqrestore(&ha->mbx_reg_lock, mbx_flags);
wait_time = jiffies + mcp->tov * HZ; /* wait at most tov secs */
while (!ha->flags.mbox_int) {
@ -201,9 +191,6 @@ qla2x00_mailbox_command(scsi_qla_host_t *ha, mbx_cmd_t *mcp)
} /* while */
}
if (!abort_active)
spin_lock_irqsave(&ha->mbx_reg_lock, mbx_flags);
/* Check whether we timed out */
if (ha->flags.mbox_int) {
uint16_t *iptr2;
@ -256,9 +243,6 @@ qla2x00_mailbox_command(scsi_qla_host_t *ha, mbx_cmd_t *mcp)
rval = QLA_FUNCTION_TIMEOUT;
}
if (!abort_active)
spin_unlock_irqrestore(&ha->mbx_reg_lock, mbx_flags);
ha->flags.mbox_busy = 0;
/* Clean up */

8
drivers/scsi/qla2xxx/qla_os.c
View File

@ -1563,14 +1563,6 @@ qla2x00_probe_one(struct pci_dev *pdev, const struct pci_device_id *id)
INIT_LIST_HEAD(&ha->list);
INIT_LIST_HEAD(&ha->fcports);
/*
* These locks are used to prevent more than one CPU
* from modifying the queue at the same time. The
* higher level "host_lock" will reduce most
* contention for these locks.
*/
spin_lock_init(&ha->mbx_reg_lock);
qla2x00_config_dma_addressing(ha);
if (qla2x00_mem_alloc(ha)) {
qla_printk(KERN_WARNING, ha,