[xen master] xen/hypfs: fix loglvl parameter setting

[patchbot@xxxxxxx]

commit ceaae74cedd2f7f8ae5c66b90da82f7ead206011
Author:     Juergen Gross <jgross@xxxxxxxx>
AuthorDate: Tue Jun 9 17:45:46 2020 +0200
Commit:     Julien Grall <jgrall@xxxxxxxxxx>
CommitDate: Thu Jun 11 16:15:15 2020 +0100

    xen/hypfs: fix loglvl parameter setting
    
    Writing the runtime parameters loglvl or guest_loglvl omits setting the
    new length of the resulting parameter value.
    
    Reported-by: George Dunlap <george.dunlap@xxxxxxxxxx>
    Signed-off-by: Juergen Gross <jgross@xxxxxxxx>
    Reviewed-by: Julien Grall <jgrall@xxxxxxxxxx>
    Release-acked-by: Paul Durran <paul@xxxxxxx>
---
 xen/drivers/char/console.c | 19 +++++++++++++++----
 1 file changed, 15 insertions(+), 4 deletions(-)

diff --git a/xen/drivers/char/console.c b/xen/drivers/char/console.c
index 56e24821b2..861ad53a8f 100644
--- a/xen/drivers/char/console.c
+++ b/xen/drivers/char/console.c
@@ -241,14 +241,25 @@ static int _parse_loglvl(const char *s, int *lower, int 
*upper, char *val)
 
 static int parse_loglvl(const char *s)
 {
-    return _parse_loglvl(s, &xenlog_lower_thresh, &xenlog_upper_thresh,
-                         xenlog_val);
+    int ret;
+
+    ret = _parse_loglvl(s, &xenlog_lower_thresh, &xenlog_upper_thresh,
+                        xenlog_val);
+    custom_runtime_set_var(param_2_parfs(parse_loglvl), xenlog_val);
+
+    return ret;
 }
 
 static int parse_guest_loglvl(const char *s)
 {
-    return _parse_loglvl(s, &xenlog_guest_lower_thresh,
-                         &xenlog_guest_upper_thresh, xenlog_guest_val);
+    int ret;
+
+    ret = _parse_loglvl(s, &xenlog_guest_lower_thresh,
+                        &xenlog_guest_upper_thresh, xenlog_guest_val);
+    custom_runtime_set_var(param_2_parfs(parse_guest_loglvl),
+                           xenlog_guest_val);
+
+    return ret;
 }
 
 static char *loglvl_str(int lvl)
--
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