[PATCH v2 2/5] chardev/char: rename `mux_cnt` to `fe_cnt` for the `MuxChardev`

[Roman Penyaev <r.peniaev@gmail.com>]

In the following patches `MuxChardev` struct will suport backend
multiplexing, the `mux_cnt` struct member has very common name
and does not reflect the actual meaning: number of frontends
attached to a mux. This patch renames the `mux_cnt` to `fe_cnt`.
No other functional changes made.

Signed-off-by: Roman Penyaev <r.peniaev@gmail.com>
Cc: "Marc-André Lureau" <marcandre.lureau@redhat.com>
Cc: qemu-devel@nongnu.org
---
 chardev/char-fe.c          |  7 +++----
 chardev/char-mux.c         | 12 ++++++------
 chardev/char.c             |  2 +-
 chardev/chardev-internal.h |  2 +-
 4 files changed, 11 insertions(+), 12 deletions(-)

diff --git a/chardev/char-fe.c b/chardev/char-fe.c
index b214ba3802b1..e6f44801162a 100644
--- a/chardev/char-fe.c
+++ b/chardev/char-fe.c
@@ -197,16 +197,15 @@ bool qemu_chr_fe_init(CharBackend *b, Chardev *s, Error **errp)
         if (CHARDEV_IS_MUX(s)) {
             MuxChardev *d = MUX_CHARDEV(s);
 
-            if (d->mux_cnt >= MAX_MUX) {
+            if (d->fe_cnt >= MAX_MUX) {
                 error_setg(errp,
                            "too many uses of multiplexed chardev '%s'"
                            " (maximum is " stringify(MAX_MUX) ")",
                            s->label);
                 return false;
             }
-
-            d->backends[d->mux_cnt] = b;
-            tag = d->mux_cnt++;
+            d->backends[d->fe_cnt] = b;
+            tag = d->fe_cnt++;
         } else if (s->be) {
             error_setg(errp, "chardev '%s' is already in use", s->label);
             return false;
diff --git a/chardev/char-mux.c b/chardev/char-mux.c
index ee2d47b20d9b..eb72b3cdb80b 100644
--- a/chardev/char-mux.c
+++ b/chardev/char-mux.c
@@ -168,9 +168,9 @@ static int mux_proc_byte(Chardev *chr, MuxChardev *d, int ch)
             qemu_chr_be_event(chr, CHR_EVENT_BREAK);
             break;
         case 'c':
-            assert(d->mux_cnt > 0); /* handler registered with first fe */
+            assert(d->fe_cnt > 0); /* handler registered with first fe */
             /* Switch to the next registered device */
-            mux_set_focus(chr, (d->focus + 1) % d->mux_cnt);
+            mux_set_focus(chr, (d->focus + 1) % d->fe_cnt);
             break;
         case 't':
             d->timestamps = !d->timestamps;
@@ -248,8 +248,8 @@ void mux_chr_send_all_event(Chardev *chr, QEMUChrEvent event)
         return;
     }
 
-    /* Send the event to all registered listeners */
-    for (i = 0; i < d->mux_cnt; i++) {
+    /* Send the event to all registered frontend listeners */
+    for (i = 0; i < d->fe_cnt; i++) {
         mux_chr_send_event(d, i, event);
     }
 }
@@ -277,7 +277,7 @@ static void char_mux_finalize(Object *obj)
     MuxChardev *d = MUX_CHARDEV(obj);
     int i;
 
-    for (i = 0; i < d->mux_cnt; i++) {
+    for (i = 0; i < d->fe_cnt; i++) {
         CharBackend *be = d->backends[i];
         if (be) {
             be->chr = NULL;
@@ -305,7 +305,7 @@ void mux_set_focus(Chardev *chr, int focus)
     MuxChardev *d = MUX_CHARDEV(chr);
 
     assert(focus >= 0);
-    assert(focus < d->mux_cnt);
+    assert(focus < d->fe_cnt);
 
     if (d->focus != -1) {
         mux_chr_send_event(d, d->focus, CHR_EVENT_MUX_OUT);
diff --git a/chardev/char.c b/chardev/char.c
index 4b3e45b2a128..3f0fcc8b16f6 100644
--- a/chardev/char.c
+++ b/chardev/char.c
@@ -333,7 +333,7 @@ static bool qemu_chr_is_busy(Chardev *s)
 {
     if (CHARDEV_IS_MUX(s)) {
         MuxChardev *d = MUX_CHARDEV(s);
-        return d->mux_cnt >= 0;
+        return d->fe_cnt >= 0;
     } else {
         return s->be != NULL;
     }
diff --git a/chardev/chardev-internal.h b/chardev/chardev-internal.h
index 4e03af31476c..e8c3c29d1a59 100644
--- a/chardev/chardev-internal.h
+++ b/chardev/chardev-internal.h
@@ -38,7 +38,7 @@ struct MuxChardev {
     CharBackend *backends[MAX_MUX];
     CharBackend chr;
     int focus;
-    int mux_cnt;
+    int fe_cnt;
     int term_got_escape;
     int max_size;
     /* Intermediate input buffer catches escape sequences even if the
-- 
2.43.0