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Message-ID: <CAA8avJ9Nb1vJO8zYPWHA39EmTfKRUJtTQW2FeZGdLTC70MjHOg@mail.gmail.com>
Date: Wed, 25 Nov 2015 08:49:39 +0530
From: Saurabh Sengar <saurabh.truth@...il.com>
To: Peter Chen <peter.chen@...escale.com>
Cc: Greg KH <gregkh@...uxfoundation.org>, linux-kernel@...r.kernel.org,
linux-usb@...r.kernel.org
Subject: Re: [PATCH] usb : replace dma_pool_alloc and memset with dma_pool_zalloc
any conclusion for this patch ?
any feedback ?
On Oct 28, 2015 2:46 PM, "Peter Chen" <peter.chen@...escale.com> wrote:
>
> On Wed, Oct 28, 2015 at 12:44:35PM +0530, Saurabh Sengar wrote:
> > replace dma_pool_alloc and memset with a single call to dma_pool_zalloc
> >
> > Signed-off-by: Saurabh Sengar <saurabh.truth@...il.com>
> > ---
> > drivers/usb/chipidea/udc.c | 3 +--
> > drivers/usb/gadget/udc/gr_udc.c | 3 +--
> > drivers/usb/host/uhci-q.c | 3 +--
> > drivers/usb/host/whci/qset.c | 3 +--
> > drivers/usb/host/xhci-mem.c | 6 ++----
> > 5 files changed, 6 insertions(+), 12 deletions(-)
> >
> > diff --git a/drivers/usb/chipidea/udc.c b/drivers/usb/chipidea/udc.c
> > index 8223fe7..235b948f 100644
> > --- a/drivers/usb/chipidea/udc.c
> > +++ b/drivers/usb/chipidea/udc.c
> > @@ -349,14 +349,13 @@ static int add_td_to_list(struct ci_hw_ep *hwep, struct ci_hw_req *hwreq,
> > if (node == NULL)
> > return -ENOMEM;
> >
> > - node->ptr = dma_pool_alloc(hwep->td_pool, GFP_ATOMIC,
> > + node->ptr = dma_pool_zalloc(hwep->td_pool, GFP_ATOMIC,
> > &node->dma);
> > if (node->ptr == NULL) {
> > kfree(node);
> > return -ENOMEM;
> > }
> >
> > - memset(node->ptr, 0, sizeof(struct ci_hw_td));
> > node->ptr->token = cpu_to_le32(length << __ffs(TD_TOTAL_BYTES));
> > node->ptr->token &= cpu_to_le32(TD_TOTAL_BYTES);
> > node->ptr->token |= cpu_to_le32(TD_STATUS_ACTIVE);
> > diff --git a/drivers/usb/gadget/udc/gr_udc.c b/drivers/usb/gadget/udc/gr_udc.c
> > index b9429bc..39b7136 100644
> > --- a/drivers/usb/gadget/udc/gr_udc.c
> > +++ b/drivers/usb/gadget/udc/gr_udc.c
> > @@ -253,13 +253,12 @@ static struct gr_dma_desc *gr_alloc_dma_desc(struct gr_ep *ep, gfp_t gfp_flags)
> > dma_addr_t paddr;
> > struct gr_dma_desc *dma_desc;
> >
> > - dma_desc = dma_pool_alloc(ep->dev->desc_pool, gfp_flags, &paddr);
> > + dma_desc = dma_pool_zalloc(ep->dev->desc_pool, gfp_flags, &paddr);
> > if (!dma_desc) {
> > dev_err(ep->dev->dev, "Could not allocate from DMA pool\n");
> > return NULL;
> > }
> >
> > - memset(dma_desc, 0, sizeof(*dma_desc));
> > dma_desc->paddr = paddr;
> >
> > return dma_desc;
> > diff --git a/drivers/usb/host/uhci-q.c b/drivers/usb/host/uhci-q.c
> > index da6f56d..c17ea15 100644
> > --- a/drivers/usb/host/uhci-q.c
> > +++ b/drivers/usb/host/uhci-q.c
> > @@ -248,11 +248,10 @@ static struct uhci_qh *uhci_alloc_qh(struct uhci_hcd *uhci,
> > dma_addr_t dma_handle;
> > struct uhci_qh *qh;
> >
> > - qh = dma_pool_alloc(uhci->qh_pool, GFP_ATOMIC, &dma_handle);
> > + qh = dma_pool_zalloc(uhci->qh_pool, GFP_ATOMIC, &dma_handle);
> > if (!qh)
> > return NULL;
> >
> > - memset(qh, 0, sizeof(*qh));
> > qh->dma_handle = dma_handle;
> >
> > qh->element = UHCI_PTR_TERM(uhci);
> > diff --git a/drivers/usb/host/whci/qset.c b/drivers/usb/host/whci/qset.c
> > index dc31c42..3297473 100644
> > --- a/drivers/usb/host/whci/qset.c
> > +++ b/drivers/usb/host/whci/qset.c
> > @@ -30,10 +30,9 @@ struct whc_qset *qset_alloc(struct whc *whc, gfp_t mem_flags)
> > struct whc_qset *qset;
> > dma_addr_t dma;
> >
> > - qset = dma_pool_alloc(whc->qset_pool, mem_flags, &dma);
> > + qset = dma_pool_zalloc(whc->qset_pool, mem_flags, &dma);
> > if (qset == NULL)
> > return NULL;
> > - memset(qset, 0, sizeof(struct whc_qset));
> >
> > qset->qset_dma = dma;
> > qset->whc = whc;
> > diff --git a/drivers/usb/host/xhci-mem.c b/drivers/usb/host/xhci-mem.c
> > index 41f841f..060c20c 100644
> > --- a/drivers/usb/host/xhci-mem.c
> > +++ b/drivers/usb/host/xhci-mem.c
> > @@ -47,13 +47,12 @@ static struct xhci_segment *xhci_segment_alloc(struct xhci_hcd *xhci,
> > if (!seg)
> > return NULL;
> >
> > - seg->trbs = dma_pool_alloc(xhci->segment_pool, flags, &dma);
> > + seg->trbs = dma_pool_zalloc(xhci->segment_pool, flags, &dma);
> > if (!seg->trbs) {
> > kfree(seg);
> > return NULL;
> > }
> >
> > - memset(seg->trbs, 0, TRB_SEGMENT_SIZE);
> > /* If the cycle state is 0, set the cycle bit to 1 for all the TRBs */
> > if (cycle_state == 0) {
> > for (i = 0; i < TRBS_PER_SEGMENT; i++)
> > @@ -517,12 +516,11 @@ static struct xhci_container_ctx *xhci_alloc_container_ctx(struct xhci_hcd *xhci
> > if (type == XHCI_CTX_TYPE_INPUT)
> > ctx->size += CTX_SIZE(xhci->hcc_params);
> >
> > - ctx->bytes = dma_pool_alloc(xhci->device_pool, flags, &ctx->dma);
> > + ctx->bytes = dma_pool_zalloc(xhci->device_pool, flags, &ctx->dma);
> > if (!ctx->bytes) {
> > kfree(ctx);
> > return NULL;
> > }
> > - memset(ctx->bytes, 0, ctx->size);
> > return ctx;
> > }
> >
> > --
>
> For chipidea changes:
> Acked-by: Peter Chen <peter.chen@...escale.com>
>
> --
>
> Best Regards,
> Peter Chen
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