2019-03-11 15:52:02

by Sabyasachi Gupta

Subject: [PATCH] scsi/dpt_i2o.c: Use dma_zalloc_coherent

Replaced dma_alloc_coherent + memset with dma_zalloc_coherent

Signed-off-by: Sabyasachi Gupta <[email protected]>
---
drivers/scsi/dpt_i2o.c | 12 ++++--------
1 file changed, 4 insertions(+), 8 deletions(-)

diff --git a/drivers/scsi/dpt_i2o.c b/drivers/scsi/dpt_i2o.c
index 37de8fb..056383a 100644
--- a/drivers/scsi/dpt_i2o.c
+++ b/drivers/scsi/dpt_i2o.c
@@ -1370,13 +1370,12 @@ static s32 adpt_i2o_reset_hba(adpt_hba* pHba)
schedule_timeout_uninterruptible(1);
} while (m == EMPTY_QUEUE);

- status = dma_alloc_coherent(&pHba->pDev->dev, 4, &addr, GFP_KERNEL);
+ status = dma_zalloc_coherent(&pHba->pDev->dev, 4, &addr, GFP_KERNEL);
if(status == NULL) {
adpt_send_nop(pHba, m);
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;
@@ -2836,14 +2835,13 @@ static s32 adpt_i2o_init_outbound_q(adpt_hba* pHba)

msg=(u32 __iomem *)(pHba->msg_addr_virt+m);

- status = dma_alloc_coherent(&pHba->pDev->dev, 4, &addr, GFP_KERNEL);
+ status = dma_zalloc_coherent(&pHba->pDev->dev, 4, &addr, GFP_KERNEL);
if (!status) {
adpt_send_nop(pHba, m);
printk(KERN_WARNING"%s: IOP reset failed - no free memory.\n",
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]);
@@ -2890,14 +2888,13 @@ static s32 adpt_i2o_init_outbound_q(adpt_hba* pHba)
pHba->reply_pool, pHba->reply_pool_pa);
}

- pHba->reply_pool = dma_alloc_coherent(&pHba->pDev->dev,
+ pHba->reply_pool = dma_zalloc_coherent(&pHba->pDev->dev,
pHba->reply_fifo_size * REPLY_FRAME_SIZE * 4,
&pHba->reply_pool_pa, GFP_KERNEL);
if (!pHba->reply_pool) {
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),
@@ -3126,13 +3123,12 @@ 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 = dma_zalloc_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;
--
2.7.4

2019-03-11 16:14:35

by James Bottomley

Subject: Re: [PATCH] scsi/dpt_i2o.c: Use dma_zalloc_coherent

On Mon, 2019-03-11 at 21:21 +0530, Sabyasachi Gupta wrote:
> Replaced dma_alloc_coherent + memset with dma_zalloc_coherent

I really don't think so. This API is going away:

https://lkml.org/lkml/2019/1/8/394

James