[UNIKRAFT PATCH] blkfront.c: Increase error verbosity

[Radu Nicolau <radunicolau102@xxxxxxxxx>]

Add error message for both function calls to differentiate
which one produced an error.

Signed-off-by: Radu Nicolau <radunicolau102@xxxxxxxxx>
---
 plat/xen/drivers/blk/blkfront_xs.c | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/plat/xen/drivers/blk/blkfront_xs.c 
b/plat/xen/drivers/blk/blkfront_xs.c
index 67c8a4c..e014d90 100644
--- a/plat/xen/drivers/blk/blkfront_xs.c
+++ b/plat/xen/drivers/blk/blkfront_xs.c
@@ -506,12 +506,18 @@ int blkfront_xb_connect(struct blkfront_dev *blkdev)
        }
 
        err = xenbus_switch_state(XBT_NIL, xendev, XenbusStateConnected);
-       if (err)
+       if (err) {
+               uk_pr_err("Failed to switch state to XenbusStateConnected: 
%d.\n",
+                               err);
                goto err;
+       }
+
 
        err = blkfront_xb_wait_be_connect(blkdev);
-       if (err)
+       if (err) {
+               uk_pr_err("Backend failed to change state: %d.\n", err);
                goto err;
+       }
 
        err = blkfront_xb_get_capabilities(blkdev);
        if (err) {
-- 
2.7.4