svn commit: r213010 - user/weongyo/usb/sys/dev/usb
Weongyo Jeong
weongyo at FreeBSD.org
Wed Sep 22 19:08:17 UTC 2010
Author: weongyo
Date: Wed Sep 22 19:08:17 2010
New Revision: 213010
URL: http://svn.freebsd.org/changeset/base/213010
Log:
Returns with correct buffer length for a single page case. In the
previous there was no way to check the boundary because the length was
always -1.
Modified:
user/weongyo/usb/sys/dev/usb/usb_busdma.c
Modified: user/weongyo/usb/sys/dev/usb/usb_busdma.c
==============================================================================
--- user/weongyo/usb/sys/dev/usb/usb_busdma.c Wed Sep 22 19:08:11 2010 (r213009)
+++ user/weongyo/usb/sys/dev/usb/usb_busdma.c Wed Sep 22 19:08:17 2010 (r213010)
@@ -78,10 +78,11 @@ static void usb_pc_common_mem_cb(void *,
* been properly initialized !
*------------------------------------------------------------------------*/
void
-usbd_get_page(struct usb_page_cache *pc, usb_frlength_t offset,
+usbd_get_page(struct usb_page_cache *pc, usb_frlength_t offset0,
struct usb_page_search *res)
{
struct usb_page *page;
+ usb_frlength_t offset = offset0;
int index;
#if USB_HAVE_BUSDMA
@@ -106,7 +107,10 @@ usbd_get_page(struct usb_page_cache *pc,
res->length = USB_PAGE_SIZE - offset;
res->physaddr = page[index].physaddr + offset;
} else {
- res->length = 0 - 1;
+ USB_ASSERT(page[index].physlen > offset0,
+ ("wrong offset (%zd/ %d)", page[index].physlen,
+ offset0));
+ res->length = page[index].physlen - offset0;
res->physaddr = page[index].physaddr + offset;
}
if (!pc->buffer) {
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