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| author | Paolo Bonzini <pbonzini@redhat.com> | 2018-03-08 16:17:59 +0100 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2018-03-12 16:12:46 +0100 |
| commit | 4397a018473ae589be959ba93cb491cbd77fe789 (patch) | |
| tree | 237ee0f3aa16d0805f9f3544d1652dcf9ef7e72f /hw/scsi/scsi-disk.c | |
| parent | 05b6cc4ae2efbafad9b45a93bccfcae51d018043 (diff) | |
| download | qemu-4397a018473ae589be959ba93cb491cbd77fe789.zip qemu-4397a018473ae589be959ba93cb491cbd77fe789.tar.gz qemu-4397a018473ae589be959ba93cb491cbd77fe789.tar.bz2 | |
scsi: support NDOB (no data-out buffer) for WRITE SAME commands
A NDOB bit set to one specifies that the disk shall not transfer data
from the data-out buffer and shall process the command as if the data-out
buffer contained user data set to all zeroes.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'hw/scsi/scsi-disk.c')
| -rw-r--r-- | hw/scsi/scsi-disk.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/hw/scsi/scsi-disk.c b/hw/scsi/scsi-disk.c index c65c1ce..5b7a48f 100644 --- a/hw/scsi/scsi-disk.c +++ b/hw/scsi/scsi-disk.c @@ -1807,7 +1807,7 @@ static void scsi_disk_emulate_write_same(SCSIDiskReq *r, uint8_t *inbuf) return; } - if (buffer_is_zero(inbuf, s->qdev.blocksize)) { + if ((req->cmd.buf[1] & 0x1) || buffer_is_zero(inbuf, s->qdev.blocksize)) { int flags = (req->cmd.buf[1] & 0x8) ? BDRV_REQ_MAY_UNMAP : 0; /* The request is used as the AIO opaque value, so add a ref. */ |