From: Andrew Cooper <andrew.cooper3@citrix.com>
Date: Tue, 19 Jan 2021 11:08:17 +0000 (+0000)
Subject: xen/gnttab: Log when grant_table_init() fails
X-Git-Tag: archive/raspbian/4.16.0+51-g0941d6cb-1+rpi1~2^2~42^2~1118
X-Git-Url: https://dgit.raspbian.org/?a=commitdiff_plain;h=3487f4cf8bf5cef47a4c3918c13a502afc9891f6;p=xen.git

xen/gnttab: Log when grant_table_init() fails

... so debug builds can see what went wrong, rather than getting an
unqualified -EINVAL out of domain creation.

Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>
Acked-by: Jan Beulich <jbeulich@suse.com>
---

diff --git a/xen/common/grant_table.c b/xen/common/grant_table.c
index b24bce0f9f..f6f5acd300 100644
--- a/xen/common/grant_table.c
+++ b/xen/common/grant_table.c
@@ -1920,7 +1920,11 @@ int grant_table_init(struct domain *d, int max_grant_frames,
     if ( max_grant_frames < INITIAL_NR_GRANT_FRAMES ||
          max_grant_frames > opt_max_grant_frames ||
          max_maptrack_frames > opt_max_maptrack_frames )
+    {
+        dprintk(XENLOG_INFO, "Bad grant table sizes: grant %u, maptrack %u\n",
+                max_grant_frames, max_maptrack_frames);
         return -EINVAL;
+    }
 
     if ( (gt = xzalloc(struct grant_table)) == NULL )
         return -ENOMEM;