diff options
| author | aliguori <aliguori@c046a42c-6fe2-441c-8c8c-71466251a162> | 2009-03-13 03:12:03 +0000 |
|---|---|---|
| committer | aliguori <aliguori@c046a42c-6fe2-441c-8c8c-71466251a162> | 2009-03-13 03:12:03 +0000 |
| commit | 537a1d4bb02b7c5d21c8f3c853f7c7ae3782bc3f (patch) | |
| tree | 93f68beb4ac7fc625c08cd06a690bf170c0fba0e /block-raw-win32.c | |
| parent | 610626af30fc142e3d420cbce6ac8bdb70377b50 (diff) | |
Fix regression introduced by r6824
The changes introduced by r6824 broke a subtle, and admittedly obscure, aspect
of the block API. While bdrv_{pread,pwrite} return the number of bytes read
or written upon success, bdrv_{read,write} returns a zero upon success.
When using bdrv_pread for bdrv_read, special care must be taken to handle this
case.
This fixes certain guest images (notably linux-0.2 provided on the qemu
website).
Reported-by: malc <av1474@comtv.ru>
Reported-by: Herve Poussineau <hpoussin@reactos.org>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6828 c046a42c-6fe2-441c-8c8c-71466251a162
Diffstat (limited to 'block-raw-win32.c')
| -rw-r--r-- | block-raw-win32.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/block-raw-win32.c b/block-raw-win32.c index 8564a72762..d034b4a069 100644 --- a/block-raw-win32.c +++ b/block-raw-win32.c @@ -145,6 +145,8 @@ static int raw_read(BlockDriverState *bs, int64_t sector_num, #endif return ret_count; } + if (ret_count == count) + ret_count = 0; return ret_count; } @@ -171,6 +173,8 @@ static int raw_write(BlockDriverState *bs, int64_t sector_num, #endif return ret_count; } + if (ret_count == count) + ret_count = 0; return ret_count; } |