linux-kernel - [PATCH] USB: XHCI: xhci-ring: Remove unused dma address calculation in inc_enq and inc

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Message-ID: <1346946453.5012.1.camel@cst-girish-laptop>
Date:	Thu, 06 Sep 2012 21:17:33 +0530
From:	Girish Verma <girish@...cuitsutra.com>
To:	kernel-janitors@...r.kernel.org
Cc:	linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org,
	sarah.a.sharp@...ux.intel.com, gregkh@...uxfoundation.org
Subject: [PATCH] USB: XHCI: xhci-ring: Remove unused dma address
 calculation in inc_enq and inc_deq function

Resending patch with latest kernel code:
In xhci-ring.c, function inc_enq and inc_deq calculate the dma address
of trb but never used. 



Signed-off-by: Girish Verma <girish@...cuitsutra.com>
---
 drivers/usb/host/xhci-ring.c |    4 ----
 1 files changed, 0 insertions(+), 4 deletions(-)

diff --git a/drivers/usb/host/xhci-ring.c b/drivers/usb/host/xhci-ring.c
index 643c2f3..5c5c47b 100644
--- a/drivers/usb/host/xhci-ring.c
+++ b/drivers/usb/host/xhci-ring.c
@@ -145,7 +145,6 @@ static void next_trb(struct xhci_hcd *xhci,
  */
 static void inc_deq(struct xhci_hcd *xhci, struct xhci_ring *ring)
 {
-	unsigned long long addr;
 
 	ring->deq_updates++;
 
@@ -176,7 +175,6 @@ static void inc_deq(struct xhci_hcd *xhci, struct
xhci_ring *ring)
 		}
 	} while (last_trb(xhci, ring, ring->deq_seg, ring->dequeue));
 
-	addr = (unsigned long long) xhci_trb_virt_to_dma(ring->deq_seg,
ring->dequeue);
 }
 
 /*
@@ -201,7 +199,6 @@ static void inc_enq(struct xhci_hcd *xhci, struct
xhci_ring *ring,
 {
 	u32 chain;
 	union xhci_trb *next;
-	unsigned long long addr;
 
 	chain = le32_to_cpu(ring->enqueue->generic.field[3]) & TRB_CHAIN;
 	/* If this is not event ring, there is one less usable TRB */
@@ -253,7 +250,6 @@ static void inc_enq(struct xhci_hcd *xhci, struct
xhci_ring *ring,
 		ring->enqueue = ring->enq_seg->trbs;
 		next = ring->enqueue;
 	}
-	addr = (unsigned long long) xhci_trb_virt_to_dma(ring->enq_seg,
ring->enqueue);
 }
 
 /*
-- 
1.7.0.4


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