[SCSI] qla2xxx: Remove RISC pause/release barriers during flash manipulation.

Remove unnecessary RISC pause/release barriers during
ISP24xx flash manipulation.  The ISP24xx can arbitrate flash
access requests during RISC executions.

Signed-off-by: Andrew Vasquez <andrew.vasquez@qlogic.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>

diff --git a/drivers/scsi/qla2xxx/qla_sup.c b/drivers/scsi/qla2xxx/qla_sup.c
index d7f5c60..c14abf7 100644 (file)
--- a/drivers/scsi/qla2xxx/qla_sup.c
+++ b/drivers/scsi/qla2xxx/qla_sup.c
@@ -468,21 +468,12 @@ qla24xx_read_flash_data(scsi_qla_host_t *ha, uint32_t *dwptr, uint32_t faddr,
     uint32_t dwords)
 {
        uint32_t i;
-       struct device_reg_24xx __iomem *reg = &ha->iobase->isp24;
-
-       /* Pause RISC. */
-       WRT_REG_DWORD(&reg->hccr, HCCRX_SET_RISC_PAUSE);
-       RD_REG_DWORD(&reg->hccr);               /* PCI Posting. */
 
        /* Dword reads to flash. */
        for (i = 0; i < dwords; i++, faddr++)
                dwptr[i] = cpu_to_le32(qla24xx_read_flash_dword(ha,
                    flash_data_to_access_addr(faddr)));
 
-       /* Release RISC pause. */
-       WRT_REG_DWORD(&reg->hccr, HCCRX_REL_RISC_PAUSE);
-       RD_REG_DWORD(&reg->hccr);               /* PCI Posting. */
-
        return dwptr;
 }
 
@@ -532,10 +523,6 @@ qla24xx_write_flash_data(scsi_qla_host_t *ha, uint32_t *dwptr, uint32_t faddr,
 
        ret = QLA_SUCCESS;
 
-       /* Pause RISC. */
-       WRT_REG_DWORD(&reg->hccr, HCCRX_SET_RISC_PAUSE);
-       RD_REG_DWORD(&reg->hccr);               /* PCI Posting. */
-
        qla24xx_get_flash_manufacturer(ha, &man_id, &flash_id);
        DEBUG9(printk("%s(%ld): Flash man_id=%d flash_id=%d\n", __func__,
            ha->host_no, man_id, flash_id));
@@ -599,10 +586,6 @@ qla24xx_write_flash_data(scsi_qla_host_t *ha, uint32_t *dwptr, uint32_t faddr,
            RD_REG_DWORD(&reg->ctrl_status) & ~CSRX_FLASH_ENABLE);
        RD_REG_DWORD(&reg->ctrl_status);        /* PCI Posting. */
 
-       /* Release RISC pause. */
-       WRT_REG_DWORD(&reg->hccr, HCCRX_REL_RISC_PAUSE);
-       RD_REG_DWORD(&reg->hccr);               /* PCI Posting. */
-
        return ret;
 }
 
@@ -630,11 +613,6 @@ qla24xx_read_nvram_data(scsi_qla_host_t *ha, uint8_t *buf, uint32_t naddr,
 {
        uint32_t i;
        uint32_t *dwptr;
-       struct device_reg_24xx __iomem *reg = &ha->iobase->isp24;
-
-       /* Pause RISC. */
-       WRT_REG_DWORD(&reg->hccr, HCCRX_SET_RISC_PAUSE);
-       RD_REG_DWORD(&reg->hccr);       /* PCI Posting. */
 
        /* Dword reads to flash. */
        dwptr = (uint32_t *)buf;
@@ -642,10 +620,6 @@ qla24xx_read_nvram_data(scsi_qla_host_t *ha, uint8_t *buf, uint32_t naddr,
                dwptr[i] = cpu_to_le32(qla24xx_read_flash_dword(ha,
                    nvram_data_to_access_addr(naddr)));
 
-       /* Release RISC pause. */
-       WRT_REG_DWORD(&reg->hccr, HCCRX_REL_RISC_PAUSE);
-       RD_REG_DWORD(&reg->hccr);       /* PCI Posting. */
-
        return buf;
 }
 
@@ -690,10 +664,6 @@ qla24xx_write_nvram_data(scsi_qla_host_t *ha, uint8_t *buf, uint32_t naddr,
 
        ret = QLA_SUCCESS;
 
-       /* Pause RISC. */
-       WRT_REG_DWORD(&reg->hccr, HCCRX_SET_RISC_PAUSE);
-       RD_REG_DWORD(&reg->hccr);               /* PCI Posting. */
-
        /* Enable flash write. */
        WRT_REG_DWORD(&reg->ctrl_status,
            RD_REG_DWORD(&reg->ctrl_status) | CSRX_FLASH_ENABLE);
@@ -728,9 +698,5 @@ qla24xx_write_nvram_data(scsi_qla_host_t *ha, uint8_t *buf, uint32_t naddr,
            RD_REG_DWORD(&reg->ctrl_status) & ~CSRX_FLASH_ENABLE);
        RD_REG_DWORD(&reg->ctrl_status);        /* PCI Posting. */
 
-       /* Release RISC pause. */
-       WRT_REG_DWORD(&reg->hccr, HCCRX_REL_RISC_PAUSE);
-       RD_REG_DWORD(&reg->hccr);               /* PCI Posting. */
-
        return ret;
 }