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scsi-generic: Fill in opt_xfer_len in INQUIRY reply if it is zero

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When opt_xfer_len is zero, Linux ignores max_xfer_len erroneously.

While that obviously should be fixed, we do older guests a favor to
always filling in a value.

Signed-off-by: Fam Zheng <famz@redhat.com>
Message-Id: <20170327142625.1249-1-famz@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Fam Zheng 2017-03-27 22:26:25 +08:00 committed by Paolo Bonzini
parent 5354edd286
commit bed58b4443
1 changed files with 2 additions and 3 deletions
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5
hw/scsi/scsi-generic.c
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@ -237,9 +237,8 @@ static void scsi_read_complete(void * opaque, int ret)
assert(max_transfer);
stl_be_p(&r->buf[8], max_transfer);
/* Also take care of the opt xfer len. */
if (ldl_be_p(&r->buf[12]) > max_transfer) {
stl_be_p(&r->buf[12], max_transfer);
}
stl_be_p(&r->buf[12],
MIN_NON_ZERO(max_transfer, ldl_be_p(&r->buf[12])));
}
scsi_req_data(&r->req, len);
scsi_req_unref(&r->req);