From 8e0ff81d6f64554d762a237c75f1673a28480693 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Rafa=C3=ABl=20Carr=C3=A9?= <rafael.carre@gmail.com>
Date: Wed, 8 Sep 2010 05:04:48 +0000
Subject: [PATCH] USB AMSv2: only read endpoint interrupt status register once

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@28041 a1c6a512-1295-4272-9138-f99709370657
---
 firmware/target/arm/as3525/usb-drv-as3525v2.c | 18 ++++++++++--------
 1 file changed, 10 insertions(+), 8 deletions(-)

diff --git a/firmware/target/arm/as3525/usb-drv-as3525v2.c b/firmware/target/arm/as3525/usb-drv-as3525v2.c
index 5c1a062ede..9741a7b453 100644
--- a/firmware/target/arm/as3525/usb-drv-as3525v2.c
+++ b/firmware/target/arm/as3525/usb-drv-as3525v2.c
@@ -466,9 +466,10 @@ static void handle_ep_int(int ep, bool dir_in)
     struct usb_endpoint *endpoint = &endpoints[ep][dir_in];
     if(dir_in)
     {
-        if(DIEPINT(ep) & DIEPINT_ahberr)
+        unsigned long sts = DIEPINT(ep);
+        if(sts & DIEPINT_ahberr)
             panicf("usb-drv: ahb error on EP%d IN", ep);
-        if(DIEPINT(ep) & DIEPINT_xfercompl)
+        if(sts & DIEPINT_xfercompl)
         {
             if(endpoint->busy)
             {
@@ -487,7 +488,7 @@ static void handle_ep_int(int ep, bool dir_in)
                 wakeup_signal(&endpoint->complete);
             }
         }
-        if(DIEPINT(ep) & DIEPINT_timeout)
+        if(sts & DIEPINT_timeout)
         {
             panicf("usb-drv: timeout on EP%d IN", ep);
             if(endpoint->busy)
@@ -501,13 +502,14 @@ static void handle_ep_int(int ep, bool dir_in)
             }
         }
         /* clear interrupts */
-        DIEPINT(ep) = DIEPINT(ep);
+        DIEPINT(ep) = sts;
     }
     else
     {
-        if(DOEPINT(ep) & DOEPINT_ahberr)
+        unsigned long sts = DOEPINT(ep);
+        if(sts & DOEPINT_ahberr)
             panicf("usb-drv: ahb error on EP%d OUT", ep);
-        if(DOEPINT(ep) & DOEPINT_xfercompl)
+        if(sts & DOEPINT_xfercompl)
         {
             logf("usb-drv: xfer complete on EP%d OUT", ep);
             if(endpoint->busy)
@@ -527,7 +529,7 @@ static void handle_ep_int(int ep, bool dir_in)
                 wakeup_signal(&endpoint->complete);
             }
         }
-        if(DOEPINT(ep) & DOEPINT_setup)
+        if(sts & DOEPINT_setup)
         {
             logf("usb-drv: setup on EP%d OUT", ep);
             if(ep != 0)
@@ -553,7 +555,7 @@ static void handle_ep_int(int ep, bool dir_in)
             }
         }
         /* clear interrupts */
-        DOEPINT(ep) = DOEPINT(ep);
+        DOEPINT(ep) = sts;
     }
 }