lkml.org 
[lkml]   [2002]   [Sep]   [3]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
Date
From
SubjectRe: One more bio for for floppy users in 2.5.33..

On Tue, 3 Sep 2002, Mikael Pettersson wrote:
>
> Confirmed. 2.5.33 + your two patches still corrupts data on a simple
> dd to then from /dev/fd0 test.

Ok, if you don't have BK, then here's the floppy driver end_request()
cleanup as a plain patch.

This passes dd tests for me, but they were by no means very exhaustive.

Linus

---
# The following is the BitKeeper ChangeSet Log
# --------------------------------------------
# 02/09/03 torvalds@home.transmeta.com 1.581.4.2
# Fix floppy driver end_request() handling - it used to do insane
# contortions instead of just calling "end_that_request_first()" with
# the proper sector count.
# --------------------------------------------
#
diff -Nru a/drivers/block/floppy.c b/drivers/block/floppy.c
--- a/drivers/block/floppy.c Tue Sep 3 14:51:09 2002
+++ b/drivers/block/floppy.c Tue Sep 3 14:51:09 2002
@@ -2295,16 +2295,15 @@
{
kdev_t dev = req->rq_dev;

- if (end_that_request_first(req, uptodate, req->hard_cur_sectors))
+ if (end_that_request_first(req, uptodate, current_count_sectors))
return;
add_blkdev_randomness(major(dev));
floppy_off(DEVICE_NR(dev));
blkdev_dequeue_request(req);
end_that_request_last(req);

- /* Get the next request */
- req = elv_next_request(QUEUE);
- CURRENT = req;
+ /* We're done with the request */
+ CURRENT = NULL;
}


@@ -2335,27 +2334,8 @@

/* unlock chained buffers */
spin_lock_irqsave(q->queue_lock, flags);
- while (current_count_sectors && CURRENT &&
- current_count_sectors >= req->current_nr_sectors){
- current_count_sectors -= req->current_nr_sectors;
- req->nr_sectors -= req->current_nr_sectors;
- req->sector += req->current_nr_sectors;
- end_request(req, 1);
- }
+ end_request(req, 1);
spin_unlock_irqrestore(q->queue_lock, flags);
-
- if (current_count_sectors && CURRENT) {
- /* "unlock" last subsector */
- req->buffer += current_count_sectors <<9;
- req->current_nr_sectors -= current_count_sectors;
- req->nr_sectors -= current_count_sectors;
- req->sector += current_count_sectors;
- return;
- }
-
- if (current_count_sectors && !CURRENT)
- DPRINT("request list destroyed in floppy request done\n");
-
} else {
if (rq_data_dir(req) == WRITE) {
/* record write error information */
-
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 13:28    [W:0.139 / U:0.524 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site