[PATCH] usb: host: ehci: Use dma_pool_zalloc()

[Souptick Joarder]

Use dma_pool_zalloc() instead of dma_pool_alloc + memset

Signed-off-by: Souptick Joarder <jrdr.li...@gmail.com>
---
 drivers/usb/host/ehci-mem.c   | 3 +--
 drivers/usb/host/ehci-sched.c | 6 ++----
 2 files changed, 3 insertions(+), 6 deletions(-)

diff --git a/drivers/usb/host/ehci-mem.c b/drivers/usb/host/ehci-mem.c
index 21307d8..4c6c08b 100644
--- a/drivers/usb/host/ehci-mem.c
+++ b/drivers/usb/host/ehci-mem.c
@@ -73,10 +73,9 @@ static struct ehci_qh *ehci_qh_alloc (struct ehci_hcd *ehci, 
gfp_t flags)
        if (!qh)
                goto done;
        qh->hw = (struct ehci_qh_hw *)
-               dma_pool_alloc(ehci->qh_pool, flags, &dma);
+               dma_pool_zalloc(ehci->qh_pool, flags, &dma);
        if (!qh->hw)
                goto fail;
-       memset(qh->hw, 0, sizeof *qh->hw);
        qh->qh_dma = dma;
        // INIT_LIST_HEAD (&qh->qh_list);
        INIT_LIST_HEAD (&qh->qtd_list);
diff --git a/drivers/usb/host/ehci-sched.c b/drivers/usb/host/ehci-sched.c
index e56db44..28e2a33 100644
--- a/drivers/usb/host/ehci-sched.c
+++ b/drivers/usb/host/ehci-sched.c
@@ -1287,7 +1287,7 @@ static void scan_intr(struct ehci_hcd *ehci)
                } else {
  alloc_itd:
                        spin_unlock_irqrestore(&ehci->lock, flags);
-                       itd = dma_pool_alloc(ehci->itd_pool, mem_flags,
+                       itd = dma_pool_zalloc(ehci->itd_pool, mem_flags,
                                        &itd_dma);
                        spin_lock_irqsave(&ehci->lock, flags);
                        if (!itd) {
@@ -1297,7 +1297,6 @@ static void scan_intr(struct ehci_hcd *ehci)
                        }
                }

-               memset(itd, 0, sizeof(*itd));
                itd->itd_dma = itd_dma;
                itd->frame = NO_FRAME;
                list_add(&itd->itd_list, &sched->td_list);
@@ -2081,7 +2080,7 @@ static int itd_submit(struct ehci_hcd *ehci, struct urb 
*urb,
                } else {
  alloc_sitd:
                        spin_unlock_irqrestore(&ehci->lock, flags);
-                       sitd = dma_pool_alloc(ehci->sitd_pool, mem_flags,
+                       sitd = dma_pool_zalloc(ehci->sitd_pool, mem_flags,
                                        &sitd_dma);
                        spin_lock_irqsave(&ehci->lock, flags);
                        if (!sitd) {
@@ -2091,7 +2090,6 @@ static int itd_submit(struct ehci_hcd *ehci, struct urb 
*urb,
                        }
                }

-               memset(sitd, 0, sizeof(*sitd));
                sitd->sitd_dma = sitd_dma;
                sitd->frame = NO_FRAME;
                list_add(&sitd->sitd_list, &iso_sched->td_list);
--
1.9.1

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