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Date: Thu, 18 Oct 2018 17:32:59 +0100 From: John Garry <john.garry@...wei.com> To: Sabyasachi Gupta <sabyasachi.linux@...il.com>, <jejb@...ux.vnet.ibm.com>, <martin.petersen@...cle.com>, <keescook@...omium.org>, <jinpu.wang@...fitbricks.com> CC: <jrdr.linux@...il.com>, <linux-scsi@...r.kernel.org>, <linux-kernel@...r.kernel.org>, <brajeswar.linux@...il.com> Subject: Re: [PATCH] scsi/mvsas/mv_sas.c: Use dma_pool_zalloc On 18/10/2018 17:06, Sabyasachi Gupta wrote: > Replaced dma_pool_alloc + memset with dma_pool_zalloc > Signed-off-by: Sabyasachi Gupta <sabyasachi.linux@...il.com> > --- > drivers/scsi/mvsas/mv_sas.c | 3 +-- > 1 file changed, 1 insertion(+), 2 deletions(-) > > diff --git a/drivers/scsi/mvsas/mv_sas.c b/drivers/scsi/mvsas/mv_sas.c > index cff43bd..d00d37d 100644 > --- a/drivers/scsi/mvsas/mv_sas.c > +++ b/drivers/scsi/mvsas/mv_sas.c > @@ -790,12 +790,11 @@ static int mvs_task_prep(struct sas_task *task, struct mvs_info *mvi, int is_tmf > slot->n_elem = n_elem; > slot->slot_tag = tag; > > - slot->buf = dma_pool_alloc(mvi->dma_pool, GFP_ATOMIC, &slot->buf_dma); > + slot->buf = dma_pool_zalloc(mvi->dma_pool, GFP_ATOMIC, &slot->buf_dma); > if (!slot->buf) { > rc = -ENOMEM; > goto err_out_tag; > } > - memset(slot->buf, 0, MVS_SLOT_BUF_SZ); > How about also fixing these, below, up to use dma_zalloc_coherent() or even dmam_alloc_coherent() [as they're manually free'd at removal]: static int mvs_alloc(struct mvs_info *mvi, struct Scsi_Host *shost) { int i = 0, slot_nr; char pool_name[32]; ... /* * alloc and init our DMA areas */ mvi->tx = dma_alloc_coherent(mvi->dev, sizeof(*mvi->tx) * MVS_CHIP_SLOT_SZ, &mvi->tx_dma, GFP_KERNEL); if (!mvi->tx) goto err_out; memset(mvi->tx, 0, sizeof(*mvi->tx) * MVS_CHIP_SLOT_SZ); ... Thanks, John > tei.task = task; > tei.hdr = &mvi->slot[tag]; >
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