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Subject[PATCH] scsi: Remove unnecessary calls to memset after dma_alloc_coherent
Date
dma_alloc_coherent() now zeroes memory after allocation, so additional
calls to memset() afterwards are unnecessary. Remove them.

Issue identified with Coccinelle.

Signed-off-by: Alex Dewar <alex.dewar@gmx.co.uk>
---
drivers/scsi/dpt_i2o.c | 8 ++------
drivers/scsi/mpt3sas/mpt3sas_base.c | 3 +--
drivers/scsi/mvsas/mv_init.c | 8 +-------
drivers/scsi/pmcraid.c | 1 -
drivers/scsi/qla2xxx/qla_isr.c | 3 +--
drivers/scsi/qla2xxx/qla_mbx.c | 4 +---
6 files changed, 6 insertions(+), 21 deletions(-)

diff --git a/drivers/scsi/dpt_i2o.c b/drivers/scsi/dpt_i2o.c
index 02dff3a684e0..3daf274f85c3 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;
@@ -2784,7 +2783,6 @@ 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]);
@@ -2838,7 +2836,6 @@ 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),
@@ -3067,13 +3064,12 @@ static int adpt_i2o_build_sys_table(void)
sys_tbl_len = sizeof(struct i2o_sys_tbl) + // Header + IOPs
(hba_count) * sizeof(struct i2o_sys_tbl_entry);

- sys_tbl = dma_alloc_coherent(&pHba->pDev->dev,
- sys_tbl_len, &sys_tbl_pa, GFP_KERNEL);
+ sys_tbl = dma_alloc_coherent(&pHba->pDev->dev, sys_tbl_len,
+ &sys_tbl_pa, GFP_KERNEL);
if (!sys_tbl) {
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/mpt3sas/mpt3sas_base.c b/drivers/scsi/mpt3sas/mpt3sas_base.c
index 663782bb790d..6144c0910b90 100644
--- a/drivers/scsi/mpt3sas/mpt3sas_base.c
+++ b/drivers/scsi/mpt3sas/mpt3sas_base.c
@@ -5203,7 +5203,7 @@ _base_allocate_memory_pools(struct MPT3SAS_ADAPTER *ioc)

ioc->request_dma_sz = sz;
ioc->request = dma_alloc_coherent(&ioc->pdev->dev, sz,
- &ioc->request_dma, GFP_KERNEL);
+ &ioc->request_dma, GFP_KERNEL);
if (!ioc->request) {
ioc_err(ioc, "request pool: dma_alloc_coherent failed: hba_depth(%d), chains_per_io(%d), frame_sz(%d), total(%d kB)\n",
ioc->hba_queue_depth, ioc->chains_needed_per_io,
@@ -5215,7 +5215,6 @@ _base_allocate_memory_pools(struct MPT3SAS_ADAPTER *ioc)
_base_release_memory_pools(ioc);
goto retry_allocation;
}
- memset(ioc->request, 0, sz);

if (retry_sz)
ioc_err(ioc, "request pool: dma_alloc_coherent succeed: hba_depth(%d), chains_per_io(%d), frame_sz(%d), total(%d kb)\n",
diff --git a/drivers/scsi/mvsas/mv_init.c b/drivers/scsi/mvsas/mv_init.c
index 7af9173c4925..75c9fc37a388 100644
--- a/drivers/scsi/mvsas/mv_init.c
+++ b/drivers/scsi/mvsas/mv_init.c
@@ -244,28 +244,22 @@ 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;

- mvi->slot = dma_alloc_coherent(mvi->dev,
- sizeof(*mvi->slot) * slot_nr,
+ mvi->slot = dma_alloc_coherent(mvi->dev, sizeof(*mvi->slot) * slot_nr,
&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/pmcraid.c b/drivers/scsi/pmcraid.c
index 7eb88fe1eb0b..6976013cf4c7 100644
--- a/drivers/scsi/pmcraid.c
+++ b/drivers/scsi/pmcraid.c
@@ -4718,7 +4718,6 @@ 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/qla2xxx/qla_isr.c b/drivers/scsi/qla2xxx/qla_isr.c
index 8d7a905f6247..632fd56cb626 100644
--- a/drivers/scsi/qla2xxx/qla_isr.c
+++ b/drivers/scsi/qla2xxx/qla_isr.c
@@ -79,7 +79,7 @@ qla24xx_process_abts(struct scsi_qla_host *vha, void *pkt)
(uint8_t *)abts, sizeof(*abts));

rsp_els = dma_alloc_coherent(&ha->pdev->dev, sizeof(*rsp_els), &dma,
- GFP_KERNEL);
+ GFP_KERNEL);
if (!rsp_els) {
ql_log(ql_log_warn, vha, 0x0287,
"Failed allocate dma buffer ABTS/ELS RSP.\n");
@@ -87,7 +87,6 @@ qla24xx_process_abts(struct scsi_qla_host *vha, void *pkt)
}

/* terminate exchange */
- memset(rsp_els, 0, sizeof(*rsp_els));
rsp_els->entry_type = ELS_IOCB_TYPE;
rsp_els->entry_count = 1;
rsp_els->nport_handle = ~0;
diff --git a/drivers/scsi/qla2xxx/qla_mbx.c b/drivers/scsi/qla2xxx/qla_mbx.c
index 9fd83d1bffe0..6d8573b870bc 100644
--- a/drivers/scsi/qla2xxx/qla_mbx.c
+++ b/drivers/scsi/qla2xxx/qla_mbx.c
@@ -4887,15 +4887,13 @@ qla25xx_set_els_cmds_supported(scsi_qla_host_t *vha)
"Entered %s.\n", __func__);

els_cmd_map = dma_alloc_coherent(&ha->pdev->dev, ELS_CMD_MAP_SIZE,
- &els_cmd_map_dma, GFP_KERNEL);
+ &els_cmd_map_dma, GFP_KERNEL);
if (!els_cmd_map) {
ql_log(ql_log_warn, vha, 0x7101,
"Failed to allocate RDP els command param.\n");
return QLA_MEMORY_ALLOC_FAILED;
}

- memset(els_cmd_map, 0, ELS_CMD_MAP_SIZE);
-
els_cmd_map[index] |= 1 << bit;

mcp->mb[0] = MBC_SET_RNID_PARAMS;
--
2.26.0
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