linux-kernel - Re: [PATCH] scsi/dpt_i2o.c: Use dma_zalloc

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Date:   Fri, 4 Jan 2019 18:19:34 +0530
From:   Sabyasachi Gupta <sabyasachi.linux@...il.com>
To:     aacraid@...rosemi.com, jejb@...ux.vnet.ibm.com,
        martin.petersen@...cle.com
Cc:     Souptick Joarder <jrdr.linux@...il.com>,
        linux-scsi@...r.kernel.org, linux-kernel@...r.kernel.org,
        Brajeswar Ghosh <brajeswar.linux@...il.com>
Subject: Re: [PATCH] scsi/dpt_i2o.c: Use dma_zalloc_coherent

On Wed, Dec 19, 2018 at 6:41 PM Sabyasachi Gupta
<sabyasachi.linux@...il.com> wrote:
>
> On Sat, Dec 1, 2018 at 6:45 PM Sabyasachi Gupta
> <sabyasachi.linux@...il.com> wrote:
> >
> > On Sat, Nov 17, 2018 at 6:17 PM Sabyasachi Gupta
> > <sabyasachi.linux@...il.com> wrote:
> > >
> > > Replaced dma_alloc_coherent + memset with dma_zalloc_coherent
> > >
> > > Signed-off-by: Sabyasachi Gupta <sabyasachi.linux@...il.com>
> >
> > Any comment on this patch?
>
> Any comment on this patch?
>
Any comment on this patch?

> >
> > > ---
> > >  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
> > >