lkml.org 
[lkml]   [2002]   [Jun]   [12]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
Subject[PATCH] use __dma_buffer for USB
From
Date
Use __dma_buffer to align buffer in struct usb_hub and descriptor in
struct usb_device since both are used for DMA.

Patch is against 2.4.19-pre10.

Thanks,
Roland

drivers/usb/hub.h | 3 ++-
include/linux/usb.h | 3 ++-
2 files changed, 4 insertions(+), 2 deletions(-)

diff -Naur linux-2.4.19-pre9.orig/drivers/usb/hub.h linux-2.4.19-pre9/drivers/usb/hub.h
--- linux-2.4.19-pre9.orig/drivers/usb/hub.h Wed Jun 12 14:53:36 2002
+++ linux-2.4.19-pre9/drivers/usb/hub.h Wed Jun 12 14:55:58 2002
@@ -3,6 +3,7 @@

#include <linux/list.h>
#include <linux/compiler.h> /* likely()/unlikely() */
+#include <asm/dma_buffer.h>

/*
* Hub request types
@@ -125,7 +126,7 @@

struct urb *urb; /* Interrupt polling pipe */

- char buffer[(USB_MAXCHILDREN + 1 + 7) / 8]; /* add 1 bit for hub status change */
+ char buffer[(USB_MAXCHILDREN + 1 + 7) / 8] __dma_buffer; /* add 1 bit for hub status change */
/* and add 7 bits to round up to byte boundary */
int error;
int nerrors;
diff -Naur linux-2.4.19-pre9.orig/include/linux/usb.h linux-2.4.19-pre9/include/linux/usb.h
--- linux-2.4.19-pre9.orig/include/linux/usb.h Wed Jun 12 14:53:52 2002
+++ linux-2.4.19-pre9/include/linux/usb.h Wed Jun 12 14:55:40 2002
@@ -139,6 +139,7 @@
#include <linux/interrupt.h> /* for in_interrupt() */
#include <linux/config.h>
#include <linux/list.h>
+#include <asm/dma_buffer.h>

#define USB_MAJOR 180

@@ -781,7 +782,7 @@
struct usb_device *parent;
struct usb_bus *bus; /* Bus we're part of */

- struct usb_device_descriptor descriptor;/* Descriptor */
+ struct usb_device_descriptor descriptor __dma_buffer;/* Descriptor */
struct usb_config_descriptor *config; /* All of the configs */
struct usb_config_descriptor *actconfig;/* the active configuration */

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
\
 
 \ /
  Last update: 2005-03-22 13:26    [W:0.029 / U:1.436 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site