[PATCH v3 17/27] scsi: remove unneeded memset

From: Fuqian Huang
Date: Tue Jul 02 2019 - 03:59:04 EST

The memset with 0 after zeroing alloctors is unneeded.

pci_alloc_persistent calls dma_alloc_coherent directly.
In commit 518a2f1925c3
("dma-mapping: zero memory returned from dma_alloc_*"),
dma_alloc_coherent has already zeroed the memory.
So the memset after these functions is not needed.

Signed-off-by: Fuqian Huang <huangfq.daxian@xxxxxxxxx>
---
Changes in v3:
- Use actual commit rather than the merge commit in the commit message

drivers/scsi/3w-9xxx.c | 2 --
drivers/scsi/3w-xxxx.c | 2 --
drivers/scsi/aacraid/rx.c | 1 -
drivers/scsi/arcmsr/arcmsr_hba.c | 1 -
drivers/scsi/be2iscsi/be_iscsi.c | 1 -
drivers/scsi/bfa/bfad.c | 1 -
drivers/scsi/bnx2fc/bnx2fc_io.c | 2 --
drivers/scsi/dpt_i2o.c | 4 ----
drivers/scsi/esas2r/esas2r_init.c | 1 -
drivers/scsi/ips.c | 2 --
drivers/scsi/lpfc/lpfc_init.c | 2 --
drivers/scsi/megaraid/megaraid_sas_base.c | 2 --
drivers/scsi/mpt3sas/mpt3sas_transport.c | 2 --
drivers/scsi/mvsas/mv_init.c | 4 ----
drivers/scsi/myrs.c | 1 -
drivers/scsi/pmcraid.c | 1 -
drivers/scsi/qla4xxx/ql4_mbx.c | 1 -
drivers/scsi/qla4xxx/ql4_os.c | 2 --
drivers/scsi/qlogicpti.c | 2 --
19 files changed, 34 deletions(-)

diff --git a/drivers/scsi/3w-9xxx.c b/drivers/scsi/3w-9xxx.c
index 3337b1e80412..da17d9104e6b 100644
--- a/drivers/scsi/3w-9xxx.c
+++ b/drivers/scsi/3w-9xxx.c
@@ -534,8 +534,6 @@ static int twa_allocate_memory(TW_Device_Extension *tw_dev, int size, int which)
goto out;
}

- memset(cpu_addr, 0, size*TW_Q_LENGTH);
-
for (i = 0; i < TW_Q_LENGTH; i++) {
switch(which) {
case 0:
diff --git a/drivers/scsi/3w-xxxx.c b/drivers/scsi/3w-xxxx.c
index 2b1e0d503020..26703ef52a2e 100644
--- a/drivers/scsi/3w-xxxx.c
+++ b/drivers/scsi/3w-xxxx.c
@@ -848,8 +848,6 @@ static int tw_allocate_memory(TW_Device_Extension *tw_dev, int size, int which)
return 1;
}

- memset(cpu_addr, 0, size*TW_Q_LENGTH);
-
for (i=0;i<TW_Q_LENGTH;i++) {
switch(which) {
case 0:
diff --git a/drivers/scsi/aacraid/rx.c b/drivers/scsi/aacraid/rx.c
index 3dea348bd25d..4d3484cbca26 100644
--- a/drivers/scsi/aacraid/rx.c
+++ b/drivers/scsi/aacraid/rx.c
@@ -353,7 +353,6 @@ static int aac_rx_check_health(struct aac_dev *dev)
dma_free_coherent(&dev->pdev->dev, 512, buffer, baddr);
return ret;
}
- memset(buffer, 0, 512);
post->Post_Command = cpu_to_le32(COMMAND_POST_RESULTS);
post->Post_Address = cpu_to_le32(baddr);
rx_writel(dev, MUnit.IMRx[0], paddr);
diff --git a/drivers/scsi/arcmsr/arcmsr_hba.c b/drivers/scsi/arcmsr/arcmsr_hba.c
index 88053b15c363..a0d0dc83184f 100644
--- a/drivers/scsi/arcmsr/arcmsr_hba.c
+++ b/drivers/scsi/arcmsr/arcmsr_hba.c
@@ -727,7 +727,6 @@ static int arcmsr_alloc_ccb_pool(struct AdapterControlBlock *acb)
}
acb->dma_coherent = dma_coherent;
acb->dma_coherent_handle = dma_coherent_handle;
- memset(dma_coherent, 0, acb->uncache_size);
acb->ccbsize = roundup_ccbsize;
ccb_tmp = dma_coherent;
curr_phy_upper32 = upper_32_bits(dma_coherent_handle);
diff --git a/drivers/scsi/be2iscsi/be_iscsi.c b/drivers/scsi/be2iscsi/be_iscsi.c
index 2058d50d62e1..09d63bac6d80 100644
--- a/drivers/scsi/be2iscsi/be_iscsi.c
+++ b/drivers/scsi/be2iscsi/be_iscsi.c
@@ -1081,7 +1081,6 @@ static int beiscsi_open_conn(struct iscsi_endpoint *ep,
return -ENOMEM;
}
nonemb_cmd.size = req_memsize;
- memset(nonemb_cmd.va, 0, nonemb_cmd.size);
tag = mgmt_open_connection(phba, dst_addr, beiscsi_ep, &nonemb_cmd);
if (!tag) {
beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG,
diff --git a/drivers/scsi/bfa/bfad.c b/drivers/scsi/bfa/bfad.c
index 2f9213b257a4..39ac58337290 100644
--- a/drivers/scsi/bfa/bfad.c
+++ b/drivers/scsi/bfa/bfad.c
@@ -622,7 +622,6 @@ bfad_hal_mem_alloc(struct bfad_s *bfad)
goto ext;
}
dma_elem->dma = phys_addr;
- memset(dma_elem->kva, 0, dma_elem->mem_len);
}
ext:
return rc;
diff --git a/drivers/scsi/bnx2fc/bnx2fc_io.c b/drivers/scsi/bnx2fc/bnx2fc_io.c
index 8def63c0755f..92b289466797 100644
--- a/drivers/scsi/bnx2fc/bnx2fc_io.c
+++ b/drivers/scsi/bnx2fc/bnx2fc_io.c
@@ -614,8 +614,6 @@ int bnx2fc_init_mp_req(struct bnx2fc_cmd *io_req)
bnx2fc_free_mp_resc(io_req);
return FAILED;
}
- memset(mp_req->req_buf, 0, CNIC_PAGE_SIZE);
- memset(mp_req->resp_buf, 0, CNIC_PAGE_SIZE);

/* Allocate and map mp_req_bd and mp_resp_bd */
sz = sizeof(struct fcoe_bd_ctx);
diff --git a/drivers/scsi/dpt_i2o.c b/drivers/scsi/dpt_i2o.c
index abc74fd474dc..b1b879beebfb 100644
--- a/drivers/scsi/dpt_i2o.c
+++ b/drivers/scsi/dpt_i2o.c
@@ -1331,7 +1331,6 @@ static s32 adpt_i2o_reset_hba(adpt_hba* pHba)
printk(KERN_ERR"IOP reset failed - no free memory.\n");
return -ENOMEM;
}
- memset(status,0,4);

msg[0]=EIGHT_WORD_MSG_SIZE|SGL_OFFSET_0;
msg[1]=I2O_CMD_ADAPTER_RESET<<24|HOST_TID<<12|ADAPTER_TID;
@@ -2803,7 +2802,6 @@ static s32 adpt_i2o_init_outbound_q(adpt_hba* pHba)
pHba->name);
return -ENOMEM;
}
- memset(status, 0, 4);

writel(EIGHT_WORD_MSG_SIZE| SGL_OFFSET_6, &msg[0]);
writel(I2O_CMD_OUTBOUND_INIT<<24 | HOST_TID<<12 | ADAPTER_TID, &msg[1]);
@@ -2857,7 +2855,6 @@ static s32 adpt_i2o_init_outbound_q(adpt_hba* pHba)
printk(KERN_ERR "%s: Could not allocate reply pool\n", pHba->name);
return -ENOMEM;
}
- memset(pHba->reply_pool, 0 , pHba->reply_fifo_size * REPLY_FRAME_SIZE * 4);

for(i = 0; i < pHba->reply_fifo_size; i++) {
writel(pHba->reply_pool_pa + (i * REPLY_FRAME_SIZE * 4),
@@ -3092,7 +3089,6 @@ static int adpt_i2o_build_sys_table(void)
printk(KERN_WARNING "SysTab Set failed. Out of memory.\n");
return -ENOMEM;
}
- memset(sys_tbl, 0, sys_tbl_len);

sys_tbl->num_entries = hba_count;
sys_tbl->version = I2OVERSION;
diff --git a/drivers/scsi/esas2r/esas2r_init.c b/drivers/scsi/esas2r/esas2r_init.c
index 950cd92df2ff..67e7a78f408b 100644
--- a/drivers/scsi/esas2r/esas2r_init.c
+++ b/drivers/scsi/esas2r/esas2r_init.c
@@ -390,7 +390,6 @@ int esas2r_init_adapter(struct Scsi_Host *host, struct pci_dev *pcid,
a->uncached,
upper_32_bits(bus_addr),
lower_32_bits(bus_addr));
- memset(a->uncached, 0, a->uncached_size);
next_uncached = a->uncached;

if (!esas2r_init_adapter_struct(a,
diff --git a/drivers/scsi/ips.c b/drivers/scsi/ips.c
index e8bc8d328bab..ad941bb28060 100644
--- a/drivers/scsi/ips.c
+++ b/drivers/scsi/ips.c
@@ -4322,8 +4322,6 @@ ips_allocatescbs(ips_ha_t * ha)
return 0;
}

- memset(ha->scbs, 0, ha->max_cmds * sizeof (ips_scb_t));
-
for (i = 0; i < ha->max_cmds; i++) {
scb_p = &ha->scbs[i];
scb_p->scb_busaddr = command_dma + sizeof (ips_scb_t) * i;
diff --git a/drivers/scsi/lpfc/lpfc_init.c b/drivers/scsi/lpfc/lpfc_init.c
index eaaef682de25..c3cca3be87f1 100644
--- a/drivers/scsi/lpfc/lpfc_init.c
+++ b/drivers/scsi/lpfc/lpfc_init.c
@@ -7770,8 +7770,6 @@ lpfc_sli_pci_mem_setup(struct lpfc_hba *phba)
phba->hbqs[LPFC_ELS_HBQ].hbq_alloc_buffer = lpfc_els_hbq_alloc;
phba->hbqs[LPFC_ELS_HBQ].hbq_free_buffer = lpfc_els_hbq_free;

- memset(phba->hbqslimp.virt, 0, lpfc_sli_hbq_size());
-
phba->MBslimaddr = phba->slim_memmap_p;
phba->HAregaddr = phba->ctrl_regs_memmap_p + HA_REG_OFFSET;
phba->CAregaddr = phba->ctrl_regs_memmap_p + CA_REG_OFFSET;
diff --git a/drivers/scsi/megaraid/megaraid_sas_base.c b/drivers/scsi/megaraid/megaraid_sas_base.c
index 3dd1df472dc6..342b39bc9210 100644
--- a/drivers/scsi/megaraid/megaraid_sas_base.c
+++ b/drivers/scsi/megaraid/megaraid_sas_base.c
@@ -4141,8 +4141,6 @@ int megasas_alloc_cmds(struct megasas_instance *instance)
return -ENOMEM;
}

- memset(instance->cmd_list, 0, sizeof(struct megasas_cmd *) *max_cmd);
-
for (i = 0; i < max_cmd; i++) {
instance->cmd_list[i] = kmalloc(sizeof(struct megasas_cmd),
GFP_KERNEL);
diff --git a/drivers/scsi/mpt3sas/mpt3sas_transport.c b/drivers/scsi/mpt3sas/mpt3sas_transport.c
index 60ae2d0feb2b..b09af57840d8 100644
--- a/drivers/scsi/mpt3sas/mpt3sas_transport.c
+++ b/drivers/scsi/mpt3sas/mpt3sas_transport.c
@@ -1111,7 +1111,6 @@ _transport_get_expander_phy_error_log(struct MPT3SAS_ADAPTER *ioc,
}

rc = -EINVAL;
- memset(data_out, 0, sz);
phy_error_log_request = data_out;
phy_error_log_request->smp_frame_type = 0x40;
phy_error_log_request->function = 0x11;
@@ -1401,7 +1400,6 @@ _transport_expander_phy_control(struct MPT3SAS_ADAPTER *ioc,
}

rc = -EINVAL;
- memset(data_out, 0, sz);
phy_control_request = data_out;
phy_control_request->smp_frame_type = 0x40;
phy_control_request->function = 0x91;
diff --git a/drivers/scsi/mvsas/mv_init.c b/drivers/scsi/mvsas/mv_init.c
index da719b0694dc..f2fae160691d 100644
--- a/drivers/scsi/mvsas/mv_init.c
+++ b/drivers/scsi/mvsas/mv_init.c
@@ -241,19 +241,16 @@ static int mvs_alloc(struct mvs_info *mvi, struct Scsi_Host *shost)
&mvi->tx_dma, GFP_KERNEL);
if (!mvi->tx)
goto err_out;
- memset(mvi->tx, 0, sizeof(*mvi->tx) * MVS_CHIP_SLOT_SZ);
mvi->rx_fis = dma_alloc_coherent(mvi->dev, MVS_RX_FISL_SZ,
&mvi->rx_fis_dma, GFP_KERNEL);
if (!mvi->rx_fis)
goto err_out;
- memset(mvi->rx_fis, 0, MVS_RX_FISL_SZ);

mvi->rx = dma_alloc_coherent(mvi->dev,
sizeof(*mvi->rx) * (MVS_RX_RING_SZ + 1),
&mvi->rx_dma, GFP_KERNEL);
if (!mvi->rx)
goto err_out;
- memset(mvi->rx, 0, sizeof(*mvi->rx) * (MVS_RX_RING_SZ + 1));
mvi->rx[0] = cpu_to_le32(0xfff);
mvi->rx_cons = 0xfff;

@@ -262,7 +259,6 @@ static int mvs_alloc(struct mvs_info *mvi, struct Scsi_Host *shost)
&mvi->slot_dma, GFP_KERNEL);
if (!mvi->slot)
goto err_out;
- memset(mvi->slot, 0, sizeof(*mvi->slot) * slot_nr);

mvi->bulk_buffer = dma_alloc_coherent(mvi->dev,
TRASH_BUCKET_SIZE,
diff --git a/drivers/scsi/myrs.c b/drivers/scsi/myrs.c
index eb0dd566330a..566cacee23b7 100644
--- a/drivers/scsi/myrs.c
+++ b/drivers/scsi/myrs.c
@@ -550,7 +550,6 @@ static bool myrs_enable_mmio_mbox(struct myrs_hba *cs,
goto out_free;

/* Enable the Memory Mailbox Interface. */
- memset(mbox, 0, sizeof(union myrs_cmd_mbox));
mbox->set_mbox.id = 1;
mbox->set_mbox.opcode = MYRS_CMD_OP_IOCTL;
mbox->set_mbox.control.no_autosense = true;
diff --git a/drivers/scsi/pmcraid.c b/drivers/scsi/pmcraid.c
index ca22526aff7f..9e11e20d9e0d 100644
--- a/drivers/scsi/pmcraid.c
+++ b/drivers/scsi/pmcraid.c
@@ -4720,7 +4720,6 @@ static int pmcraid_allocate_host_rrqs(struct pmcraid_instance *pinstance)
return -ENOMEM;
}

- memset(pinstance->hrrq_start[i], 0, buffer_size);
pinstance->hrrq_curr[i] = pinstance->hrrq_start[i];
pinstance->hrrq_end[i] =
pinstance->hrrq_start[i] + PMCRAID_MAX_CMD - 1;
diff --git a/drivers/scsi/qla4xxx/ql4_mbx.c b/drivers/scsi/qla4xxx/ql4_mbx.c
index dac9a7013208..eb3167186586 100644
--- a/drivers/scsi/qla4xxx/ql4_mbx.c
+++ b/drivers/scsi/qla4xxx/ql4_mbx.c
@@ -2354,7 +2354,6 @@ int qla4_84xx_config_acb(struct scsi_qla_host *ha, int acb_config)
rval = QLA_ERROR;
goto exit_config_acb;
}
- memset(acb, 0, acb_len);

switch (acb_config) {
case ACB_CONFIG_DISABLE:
diff --git a/drivers/scsi/qla4xxx/ql4_os.c b/drivers/scsi/qla4xxx/ql4_os.c
index 8c674eca09f1..8666d4fc93da 100644
--- a/drivers/scsi/qla4xxx/ql4_os.c
+++ b/drivers/scsi/qla4xxx/ql4_os.c
@@ -9478,8 +9478,6 @@ static int qla4xxx_context_reset(struct scsi_qla_host *ha)
goto exit_port_reset;
}

- memset(acb, 0, acb_len);
-
rval = qla4xxx_get_acb(ha, acb_dma, PRIMARI_ACB, acb_len);
if (rval != QLA_SUCCESS) {
rval = -EIO;
diff --git a/drivers/scsi/qlogicpti.c b/drivers/scsi/qlogicpti.c
index 9335849f6bea..7868db052042 100644
--- a/drivers/scsi/qlogicpti.c
+++ b/drivers/scsi/qlogicpti.c
@@ -828,8 +828,6 @@ static int qpti_map_queues(struct qlogicpti *qpti)
printk("QPTI: Cannot map request queue.\n");
return -1;
}
- memset(qpti->res_cpu, 0, QSIZE(RES_QUEUE_LEN));
- memset(qpti->req_cpu, 0, QSIZE(QLOGICPTI_REQ_QUEUE_LEN));
return 0;
}

--
2.11.0