added dmabounce debug code to ixp4xx

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@10240 3c298f89-4303-0410-b956-a3cf2f4a3e73

target/linux/ixp4xx/config-default

@@ -85,6 +85,7 @@ CONFIG_DLCI_COUNT=24
 CONFIG_DLCI_MAX=8
 # CONFIG_DM9000 is not set
 CONFIG_DMABOUNCE=y
+CONFIG_DMABOUNCE_DEBUG=y
 CONFIG_DNOTIFY=y
 # CONFIG_DSCC4 is not set
 # CONFIG_E100 is not set

target/linux/ixp4xx/patches-2.6.23/400-dmabounce.patch

@@ -0,0 +1,31 @@
+Index: linux-2.6.23.14/arch/arm/common/dmabounce.c
+===================================================================
+--- linux-2.6.23.14.orig/arch/arm/common/dmabounce.c	2008-01-24 22:03:28.475500801 +0100
++++ linux-2.6.23.14/arch/arm/common/dmabounce.c	2008-01-24 22:17:36.415822168 +0100
+@@ -116,6 +116,10 @@
+ 	} else if (size <= device_info->large.size) {
+ 		pool = &device_info->large;
+ 	} else {
++#ifdef CONFIG_DMABOUNCE_DEBUG
++		printk(KERN_INFO "A dma bounce buffer outside the pool size was requested. Requested size was 0x%08X\nThe calling code was :\n", size);
++		dump_stack();
++#endif
+ 		pool = NULL;
+ 	}
+ 
+Index: linux-2.6.23.14/arch/arm/mach-ixp4xx/Kconfig
+===================================================================
+--- linux-2.6.23.14.orig/arch/arm/mach-ixp4xx/Kconfig	2008-01-24 22:10:29.331484012 +0100
++++ linux-2.6.23.14/arch/arm/mach-ixp4xx/Kconfig	2008-01-24 22:11:42.891675973 +0100
+@@ -220,6 +220,11 @@
+ 	default y
+ 	depends on PCI
+ 
++config DMABOUNCE_DEBUG
++	bool "Enable DMABounce debuging"
++	default n
++	depends DMABOUNCE
++
+ config IXP4XX_INDIRECT_PCI
+ 	bool "Use indirect PCI memory access"
+ 	depends on PCI