diff options
| author | cperciva <cperciva@FreeBSD.org> | 2010-12-06 20:40:15 +0000 |
|---|---|---|
| committer | cperciva <cperciva@FreeBSD.org> | 2010-12-06 20:40:15 +0000 |
| commit | a78f502d16b3bff370840e3acc8a0e659f17bb24 (patch) | |
| tree | 1667d97ac869cca62dfd17a4af43c2fa9ed68bdb /sys/dev/xen | |
| parent | 1d758da82069bb1c888419a3f4d7c9cb75112b6c (diff) | |
| download | FreeBSD-src-a78f502d16b3bff370840e3acc8a0e659f17bb24.zip FreeBSD-src-a78f502d16b3bff370840e3acc8a0e659f17bb24.tar.gz | |
Set correct maximum I/O length. We can only handle I/O of up to
max_request_segments * PAGE_SIZE if the I/O is page-aligned; the
largest I/O we can guarantee will work is PAGE_SIZE less than that.
This unbreaks 'diskinfo -t'.
Diffstat (limited to 'sys/dev/xen')
| -rw-r--r-- | sys/dev/xen/blkfront/blkfront.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/sys/dev/xen/blkfront/blkfront.c b/sys/dev/xen/blkfront/blkfront.c index 8ff8757..2e08bb1 100644 --- a/sys/dev/xen/blkfront/blkfront.c +++ b/sys/dev/xen/blkfront/blkfront.c @@ -508,7 +508,7 @@ blkfront_initialize(struct xb_softc *sc) sc->ring_pages = 1; sc->max_requests = BLKIF_MAX_RING_REQUESTS(PAGE_SIZE); sc->max_request_segments = BLKIF_MAX_SEGMENTS_PER_HEADER_BLOCK; - sc->max_request_size = sc->max_request_segments * PAGE_SIZE; + sc->max_request_size = (sc->max_request_segments - 1) * PAGE_SIZE; sc->max_request_blocks = BLKIF_SEGS_TO_BLOCKS(sc->max_request_segments); /* |
