vhost-scsi: Fix log flooding with target does not exist errors

As part of the normal initiator side scanning the guest's scsi layer
will loop over all possible targets and send an inquiry. Since the
max number of targets for virtio-scsi is 256, this results in 255
error messages about targets not existing. When there's more than 1
vhost-scsi device, then you get N * 255 log messages.

It looks like the log message was added by accident in:

commit 09d7583 ("vhost/scsi: Use common handling code in request
queue handler")

The patch was just making some coce common but added the vq_err call
and I'm guessing the patch author forgot to enable the vq_err call
(vq_err is implemented by pr_debug which defaults to off). So this
patch removes the call since it's expected to hit this path during
device discovery.

Fixes: 09d7583 ("vhost/scsi: Use common handling code in request queue handler")
Signed-off-by: Mike Christie <[email protected]>

Orabug: 38099085
Signed-off-by: Mike Christie <[email protected]>
Reviewed-by: Karolina Stolarek <[email protected]>
Signed-off-by: Brian Maly <[email protected]>

Author: mikechristie

drivers/vhost/scsi.c

@@ -1166,10 +1166,8 @@ vhost_scsi_get_req(struct vhost_virtqueue *vq, struct vhost_scsi_ctx *vc,
 			/* validated at handler entry */
 			vs_tpg = vhost_vq_get_backend(vq);
 			tpg = READ_ONCE(vs_tpg[*vc->target]);
-			if (unlikely(!tpg)) {
-				vq_err(vq, "Target 0x%x does not exist\n", *vc->target);
+			if (unlikely(!tpg))
 				goto out;
-			}
 		}
 
 		if (tpgp)