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>

1 files changed, 8 insertions, 5 deletions

diff --git a/drivers/block/xen-blkback/xenbus.c b/drivers/block/xen-blkback/xenbus.c
index 876763f7f13e..16e28ee880a4 100644
--- 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));