linux-kernel - Re: [PATCH] driver/scsi/pmcraid: Use pci_zalloc_consistent instead of pci_alloc

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Date:   Wed, 1 Aug 2018 15:26:40 +0800
From:   zhong jiang <zhongjiang@...wei.com>
To:     <jejb@...ux.vnet.ibm.com>, <martin.petersen@...cle.com>
CC:     <linux-scsi@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] driver/scsi/pmcraid: Use pci_zalloc_consistent instead
 of pci_alloc_consistent+memset

ignore this ,  Will repost.
On 2018/8/1 15:08, zhong jiang wrote:
> Pci_alloc_consistent+memset is better than pci_alloc_consistent+memset,
> and it make the code concise
>
> Signed-off-by: zhong jiang <zhongjiang@...wei.com>
> ---
>  drivers/scsi/pmcraid.c | 9 +++------
>  1 file changed, 3 insertions(+), 6 deletions(-)
>
> diff --git a/drivers/scsi/pmcraid.c b/drivers/scsi/pmcraid.c
> index 4e86994..8a6facc 100644
> --- a/drivers/scsi/pmcraid.c
> +++ b/drivers/scsi/pmcraid.c
> @@ -4736,11 +4736,9 @@ static int pmcraid_allocate_host_rrqs(struct pmcraid_instance *pinstance)
>  	buffer_size = HRRQ_ENTRY_SIZE * PMCRAID_MAX_CMD;
>  
>  	for (i = 0; i < pinstance->num_hrrq; i++) {
> -		pinstance->hrrq_start[i] =
> -			pci_alloc_consistent(
> -					pinstance->pdev,
> -					buffer_size,
> -					&(pinstance->hrrq_start_bus_addr[i]));
> +		pinstance->hrrq_start[i] = pci_zalloc_consistent(pinstance->pdev,
> +								buffer_size,
> +								&(pinstance->hrrq_start_bus_addr[i]));
>  
>  		if (!pinstance->hrrq_start[i]) {
>  			pmcraid_err("pci_alloc failed for hrrq vector : %d\n",
> @@ -4749,7 +4747,6 @@ 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;