5.15-stable review patch. If anyone has any objections, please let me know.
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From: Mike Christie michael.christie@oracle.com
[ Upstream commit 69cd720a8a5e9ef0f05ce5dd8c9ea6e018245c82 ]
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 can result in 255 error messages about targets not existing if you only have a single target. When there's more than 1 vhost-scsi device each with a single target, then you get N * 255 log messages.
It looks like the log message was added by accident in:
commit 3f8ca2e115e5 ("vhost/scsi: Extract common handling code from control queue handler")
when we added common helpers. Then in:
commit 09d7583294aa ("vhost/scsi: Use common handling code in request queue handler")
we converted the scsi command processing path to use the new helpers so we started to see the extra log messages during scanning.
The patches were just making some code 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: 09d7583294aa ("vhost/scsi: Use common handling code in request queue handler") Signed-off-by: Mike Christie michael.christie@oracle.com Reviewed-by: Stefan Hajnoczi stefanha@redhat.com Reviewed-by: Stefano Garzarella sgarzare@redhat.com Message-Id: 20250611210113.10912-1-michael.christie@oracle.com Signed-off-by: Michael S. Tsirkin mst@redhat.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/vhost/scsi.c | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-)
diff --git a/drivers/vhost/scsi.c b/drivers/vhost/scsi.c index 2c19fa02141d..dff93612fcfd 100644 --- a/drivers/vhost/scsi.c +++ b/drivers/vhost/scsi.c @@ -907,10 +907,8 @@ 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)