diff options
| author | Fam Zheng <famz@redhat.com> | 2015-07-29 16:45:11 +0800 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2015-07-30 15:44:09 +0200 |
| commit | a56537a12757a8cdee24ad8c83e5af7a9833ea70 (patch) | |
| tree | e08d4d80e70d8624e36ffaa69aa0b91b32415ee6 /hw/scsi | |
| parent | 4bb7b0daf8ea34bcc582642d35a2e4902f7841db (diff) | |
scsi-disk: Fix assertion failure on WRITE SAME
The last portion of an unaligned WRITE SAME command could fail the
assertion in bdrv_aligned_pwritev:
assert(!qiov || bytes == qiov->size);
Because we updated data->iov.iov_len right above this if block, but
data->qiov still has the old size.
Reinitialize the qiov to make them equal and keep block layer happy.
Cc: qemu-stable@nongnu.org
Signed-off-by: Fam Zheng <famz@redhat.com>
Message-Id: <1438159512-3871-2-git-send-email-famz@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'hw/scsi')
| -rw-r--r-- | hw/scsi/scsi-disk.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/hw/scsi/scsi-disk.c b/hw/scsi/scsi-disk.c index 73fed3f233..087541d3b7 100644 --- a/hw/scsi/scsi-disk.c +++ b/hw/scsi/scsi-disk.c @@ -1683,6 +1683,10 @@ static void scsi_write_same_complete(void *opaque, int ret) if (data->iov.iov_len) { block_acct_start(blk_get_stats(s->qdev.conf.blk), &r->acct, data->iov.iov_len, BLOCK_ACCT_WRITE); + /* blk_aio_write doesn't like the qiov size being different from + * nb_sectors, make sure they match. + */ + qemu_iovec_init_external(&data->qiov, &data->iov, 1); r->req.aiocb = blk_aio_writev(s->qdev.conf.blk, data->sector, &data->qiov, data->iov.iov_len / 512, scsi_write_same_complete, data); |