xen-blkback: advertise indirect segment support earlier

There's no reason to defer this until the connect phase, and in fact
there are frontend implementations expecting this to be available
earlier. Move it into the probe function.

Acked-by: Roger Pau Monné <roger.pau@citrix.com>
Signed-off-by: Jan Beulich <jbeulich@suse.com>
Cc: Bob Liu <bob.liu@oracle.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>

diff --git a/drivers/block/xen-blkback/xenbus.c b/drivers/block/xen-blkback/xenbus.c
index 876763f7f13e1a77f8f64738de967c1f21815440..16e28ee880a40aa7ef904d34dd7e0a0f96ae17b6 100644 (file)
--- a/drivers/block/xen-blkback/xenbus.c
+++ b/drivers/block/xen-blkback/xenbus.c
@@ -618,6 +618,14 @@ static int xen_blkbk_probe(struct xenbus_device *dev,
                goto fail;
        }
 
+       err = xenbus_printf(XBT_NIL, dev->nodename,
+                           "feature-max-indirect-segments", "%u",
+                           MAX_INDIRECT_SEGMENTS);
+       if (err)
+               dev_warn(&dev->dev,
+                        "writing %s/feature-max-indirect-segments (%d)",
+                        dev->nodename, err);
+
        /* Multi-queue: advertise how many queues are supported by us.*/
        err = xenbus_printf(XBT_NIL, dev->nodename,
                            "multi-queue-max-queues", "%u", xenblk_max_queues);
@@ -849,11 +857,6 @@ again:
                                 dev->nodename);
                goto abort;
        }
-       err = xenbus_printf(xbt, dev->nodename, "feature-max-indirect-segments", "%u",
-                           MAX_INDIRECT_SEGMENTS);
-       if (err)
-               dev_warn(&dev->dev, "writing %s/feature-max-indirect-segments (%d)",
-                        dev->nodename, err);
 
        err = xenbus_printf(xbt, dev->nodename, "sectors", "%llu",
                            (unsigned long long)vbd_sz(&be->blkif->vbd));