diff options
| author | Roger Pau Monne <roger.pau@citrix.com> | 2012-12-07 19:00:31 +0100 |
|---|---|---|
| committer | Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> | 2012-12-17 21:56:03 -0500 |
| commit | d62f691858252333ff1ddb920e6774d9020734aa (patch) | |
| tree | d3f54da525e07849c3825d19d6d10e96ffaf1cdf /drivers/block/xen-blkback | |
| parent | ebb351cf78ee6bf3262e6b4b6906f456c05e6d5e (diff) | |
xen-blkfront: handle bvecs with partial data
Currently blkfront fails to handle cases in blkif_completion like the
following:
1st loop in rq_for_each_segment
* bv_offset: 3584
* bv_len: 512
* offset += bv_len
* i: 0
2nd loop:
* bv_offset: 0
* bv_len: 512
* i: 0
In the second loop i should be 1, since we assume we only wanted to
read a part of the previous page. This patches fixes this cases where
only a part of the shared page is read, and blkif_completion assumes
that if the bv_offset of a bvec is less than the previous bv_offset
plus the bv_size we have to switch to the next shared page.
Reported-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Signed-off-by: Roger Pau Monné <roger.pau@citrix.com>
Cc: linux-kernel@vger.kernel.org
Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Diffstat (limited to 'drivers/block/xen-blkback')
0 files changed, 0 insertions, 0 deletions