Barney Wolff wrote this message on Sun, Sep 07, 2003 at 15:48 -0400:
> I can't do more detailed diagnosis right now, but could in a few days.
When you get a chance (or anyone else who has this problem), try the
attached patch, and add options BROKEN_OHCI to your kernel config file.
Please set hw.usb.ohci.debug=1, and send me the dmesg output of the
writes. (When you copy the data to the media.)
Hmmm. I just thought of something. Now is the data corrupt still correupt
on another system? What I mean is did the data get written properly, but
just isn't being read back from the media correctly. Unless you are
coping a file larger than memory size, the cmp just pulls it from memory,
not from the media. The umount/mount forces a flush of the cache, and so
attempts to read from the media.
Thanks.
--
John-Mark Gurney Voice: +1 415 225 5579
"All that I will do, has been done, All that I have, has not."
Index: ohci.c
===================================================================
RCS file: /home/ncvs/src/sys/dev/usb/ohci.c,v
retrieving revision 1.132
diff -u -r1.132 ohci.c
--- ohci.c 2003/08/24 17:55:54 1.132
+++ ohci.c 2003/09/07 20:28:13
@@ -513,6 +513,14 @@
DPRINTFN(alen < 4096,("ohci_alloc_std_chain: start len=%d\n", alen));
+ if (ohcidebug && alen > 4096) {
+ printf("len: %d, pages: ", alen);
+ for (len = 0; len < alen; len += OHCI_PAGE_SIZE) {
+ printf("%s0x%x", len == 0 ? "" : ", ", DMAADDR(dma,
+ len));
+ }
+ }
+
len = alen;
cur = sp;
@@ -546,9 +554,14 @@
* We can describe the above using maxsegsz = 4k and nsegs = 2
* in the future.
*/
+#if BROKEN_OHCI
+ if (len < OHCI_PAGE_SIZE - OHCI_PAGE_OFFSET(dataphys))
+#else
if (OHCI_PAGE(dataphys) == OHCI_PAGE(DMAADDR(dma, offset +
len - 1)) || len - (OHCI_PAGE_SIZE -
- OHCI_PAGE_OFFSET(dataphys)) <= OHCI_PAGE_SIZE) {
+ OHCI_PAGE_OFFSET(dataphys)) <= OHCI_PAGE_SIZE)
+#endif
+ {
/* we can handle it in this TD */
curlen = len;
} else {
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