linux-kernel - [PATCH 3/3] usb: xhci: replace dma_pool_alloc and memset with dma_pool

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Date:	Wed,  2 Dec 2015 17:43:41 -0300
From:	"Geyslan G. Bem" <geyslan@...il.com>
To:	peter.senna@...il.com
Cc:	"Geyslan G. Bem" <geyslan@...il.com>,
	Mathias Nyman <mathias.nyman@...el.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH 3/3] usb: xhci: replace dma_pool_alloc and memset with dma_pool_zalloc

Replace dma_pool_alloc and memset with a single call to dma_pool_zalloc.

Caught by coccinelle.

Signed-off-by: Geyslan G. Bem <geyslan@...il.com>
---
 drivers/usb/host/xhci-mem.c | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/drivers/usb/host/xhci-mem.c b/drivers/usb/host/xhci-mem.c
index c48cbe7..d034f92 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 +516,12 @@ 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;
 }
 
-- 
2.6.2

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