[PATCH -next] scsi: dpt_i2o: remove some not needed memset

[PATCH -next] scsi: dpt_i2o: remove some not needed memset

[Wang Hai]

Fixes coccicheck warning:

./drivers/scsi/dpt_i2o.c:3070:11-29: WARNING:
 dma_alloc_coherent use in sys_tbl already zeroes out memory, so memset is not needed
./drivers/scsi/dpt_i2o.c:2780:10-28: WARNING:
 dma_alloc_coherent use in status already zeroes out memory, so memset is not needed
./drivers/scsi/dpt_i2o.c:2834:20-38: WARNING:
 dma_alloc_coherent use in pHba -> reply_pool already zeroes out memory, so memset is not needed
./drivers/scsi/dpt_i2o.c:1328:10-28: WARNING:
 dma_alloc_coherent use in status already zeroes out memory, so memset is not needed

Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Wang Hai <wanghai38@huawei.com>
---
 drivers/scsi/dpt_i2o.c | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/drivers/scsi/dpt_i2o.c b/drivers/scsi/dpt_i2o.c
index 0497ef6a9453..f654ad8a3d69 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),
@@ -3073,7 +3070,6 @@ 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;
-- 
2.17.1

Re: [PATCH -next] scsi: dpt_i2o: remove some not needed memset

[Martin K. Petersen]

On Sat, 18 Jul 2020 20:32:24 +0800, Wang Hai wrote:

> Fixes coccicheck warning:
> 
> ./drivers/scsi/dpt_i2o.c:3070:11-29: WARNING:
>  dma_alloc_coherent use in sys_tbl already zeroes out memory, so memset is not needed
> ./drivers/scsi/dpt_i2o.c:2780:10-28: WARNING:
>  dma_alloc_coherent use in status already zeroes out memory, so memset is not needed
> ./drivers/scsi/dpt_i2o.c:2834:20-38: WARNING:
>  dma_alloc_coherent use in pHba -> reply_pool already zeroes out memory, so memset is not needed
> ./drivers/scsi/dpt_i2o.c:1328:10-28: WARNING:
>  dma_alloc_coherent use in status already zeroes out memory, so memset is not needed

Applied to 5.9/scsi-queue, thanks!

[1/1] scsi: dpt_i2o: Remove superfluous memset()
      https://git.kernel.org/mkp/scsi/c/003015b890e1

-- 
Martin K. Petersen	Oracle Linux Engineering