[PATCH v3] xl: log an error if libxl_cpupool_destroy() fails

[Dario Faggioli <dario.faggioli@citrix.com>]

In fact, right now, failing at destroying a cpupool is just
not reported to the user in any explicit way.

Let's log an error, as it is customary for xl in these cases.

Signed-off-by: Dario Faggioli <dario.faggioli@citrix.com>
Reviewed-by: Juergen Gross <jgross@suse.com>
Acked-by: Wei Liu <wei.liu2@citrix.com>
---
Cc: Ian Jackson <ian.jackson@eu.citrix.com>
Cc: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Cc: Ian Campbell <ian.campbell@citrix.com>
---
Changes from v2:
 * rebased on top of staging;
 * fixed Juergen's email address

Changes from v1:
 * avoid changing the return code to EXIT_SUCCESS/FAILURE;
   that is being taken care of in another series anyway.
---
 tools/libxl/xl_cmdimpl.c |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/tools/libxl/xl_cmdimpl.c b/tools/libxl/xl_cmdimpl.c
index 2756d2f..5469735 100644
--- a/tools/libxl/xl_cmdimpl.c
+++ b/tools/libxl/xl_cmdimpl.c
@@ -7581,8 +7581,10 @@ int main_cpupooldestroy(int argc, char **argv)
         return EXIT_FAILURE;
     }
 
-    if (libxl_cpupool_destroy(ctx, poolid))
+    if (libxl_cpupool_destroy(ctx, poolid)) {
+        fprintf(stderr, "Can't destroy cpupool '%s'\n", pool);
         return EXIT_FAILURE;
+    }
 
     return EXIT_SUCCESS;
 }