[Xen-changelog] [xen-3.4-testing] minios: Fix blkfront driver when sector_size != 512

["Xen patchbot-3.4-testing" <patchbot-3.4-testing@xxxxxxxxxxxxxxxxxxx>]

# HG changeset patch
# User Keir Fraser <keir.fraser@xxxxxxxxxx>
# Date 1243863342 -3600
# Node ID 9603c86017f42529d158f373531ad2415384a011
# Parent  7998fa60ec4ba080d89d7c7e93c001f9937db471
minios: Fix blkfront driver when sector_size != 512

The first and last sector as well as the sector number of the request
is expressed in 512 bytes units, independently from the real sector
size.

Signed-off-by: Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>
xen-unstable changeset:   19635:85d6849bdcd9
xen-unstable date:        Tue May 26 09:49:19 2009 +0100
---
 extras/mini-os/blkfront.c |   10 +++++-----
 1 files changed, 5 insertions(+), 5 deletions(-)

diff -r 7998fa60ec4b -r 9603c86017f4 extras/mini-os/blkfront.c
--- a/extras/mini-os/blkfront.c Mon Jun 01 14:35:11 2009 +0100
+++ b/extras/mini-os/blkfront.c Mon Jun 01 14:35:42 2009 +0100
@@ -310,14 +310,14 @@ void blkfront_aio(struct blkfront_aiocb 
     req->nr_segments = n;
     req->handle = dev->handle;
     req->id = (uintptr_t) aiocbp;
-    req->sector_number = aiocbp->aio_offset / dev->info.sector_size;
+    req->sector_number = aiocbp->aio_offset / 512;
 
     for (j = 0; j < n; j++) {
         req->seg[j].first_sect = 0;
-        req->seg[j].last_sect = PAGE_SIZE / dev->info.sector_size - 1;
-    }
-    req->seg[0].first_sect = ((uintptr_t)aiocbp->aio_buf & ~PAGE_MASK) / 
dev->info.sector_size;
-    req->seg[n-1].last_sect = (((uintptr_t)aiocbp->aio_buf + 
aiocbp->aio_nbytes - 1) & ~PAGE_MASK) / dev->info.sector_size;
+        req->seg[j].last_sect = PAGE_SIZE / 512 - 1;
+    }
+    req->seg[0].first_sect = ((uintptr_t)aiocbp->aio_buf & ~PAGE_MASK) / 512;
+    req->seg[n-1].last_sect = (((uintptr_t)aiocbp->aio_buf + 
aiocbp->aio_nbytes - 1) & ~PAGE_MASK) / 512;
     for (j = 0; j < n; j++) {
        uintptr_t data = start + j * PAGE_SIZE;
         if (!write) {

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