[xen staging] xen/consoled: drop return value from consoled_guest_rx/tx

[patchbot@xxxxxxx]

commit 001d7fdb5512d4298d92f20cf30dd49939754403
Author:     Nicola Vetrini <nicola.vetrini@xxxxxxxxxxx>
AuthorDate: Mon Feb 26 10:17:17 2024 +0100
Commit:     Jan Beulich <jbeulich@xxxxxxxx>
CommitDate: Mon Feb 26 10:17:17 2024 +0100

    xen/consoled: drop return value from consoled_guest_rx/tx
    
    These functions never saw a usage of their return value since
    they were introduced, so it can be dropped since their usages
    violate MISRA C Rule 17.7:
    "The value returned by a function having non-void return type shall be 
used".
    
    No functional change.
    
    Signed-off-by: Nicola Vetrini <nicola.vetrini@xxxxxxxxxxx>
    Reviewed-by: Stefano Stabellini <sstabellini@xxxxxxxxxx>
---
 xen/drivers/char/consoled.c | 17 +++++------------
 xen/include/xen/consoled.h  |  4 ++--
 2 files changed, 7 insertions(+), 14 deletions(-)

diff --git a/xen/drivers/char/consoled.c b/xen/drivers/char/consoled.c
index 222e018442..b415b632ce 100644
--- a/xen/drivers/char/consoled.c
+++ b/xen/drivers/char/consoled.c
@@ -43,13 +43,13 @@ struct xencons_interface *consoled_get_ring_addr(void)
 static char buf[BUF_SZ + 1];
 
 /* Receives characters from a domain's PV console */
-size_t consoled_guest_rx(void)
+void consoled_guest_rx(void)
 {
-    size_t recv = 0, idx = 0;
+    size_t idx = 0;
     XENCONS_RING_IDX cons, prod;
 
     if ( !cons_ring )
-        return 0;
+        return;
 
     spin_lock(&rx_lock);
 
@@ -73,7 +73,6 @@ size_t consoled_guest_rx(void)
         char c = cons_ring->out[MASK_XENCONS_IDX(cons++, cons_ring->out)];
 
         buf[idx++] = c;
-        recv++;
 
         if ( idx >= BUF_SZ )
         {
@@ -92,18 +91,15 @@ size_t consoled_guest_rx(void)
 
  out:
     spin_unlock(&rx_lock);
-
-    return recv;
 }
 
 /* Sends a character into a domain's PV console */
-size_t consoled_guest_tx(char c)
+void consoled_guest_tx(char c)
 {
-    size_t sent = 0;
     XENCONS_RING_IDX cons, prod;
 
     if ( !cons_ring )
-        return 0;
+        return;
 
     cons = ACCESS_ONCE(cons_ring->in_cons);
     prod = cons_ring->in_prod;
@@ -121,7 +117,6 @@ size_t consoled_guest_tx(char c)
         goto notify;
 
     cons_ring->in[MASK_XENCONS_IDX(prod++, cons_ring->in)] = c;
-    sent++;
 
     /* Write to the ring before updating the pointer */
     smp_wmb();
@@ -130,8 +125,6 @@ size_t consoled_guest_tx(char c)
  notify:
     /* Always notify the guest: prevents receive path from getting stuck. */
     pv_shim_inject_evtchn(pv_console_evtchn());
-
-    return sent;
 }
 
 /*
diff --git a/xen/include/xen/consoled.h b/xen/include/xen/consoled.h
index 2b30516b3a..bd7ab6329e 100644
--- a/xen/include/xen/consoled.h
+++ b/xen/include/xen/consoled.h
@@ -5,8 +5,8 @@
 
 void consoled_set_ring_addr(struct xencons_interface *ring);
 struct xencons_interface *consoled_get_ring_addr(void);
-size_t consoled_guest_rx(void);
-size_t consoled_guest_tx(char c);
+void consoled_guest_rx(void);
+void consoled_guest_tx(char c);
 
 #endif /* __XEN_CONSOLED_H__ */
 /*
--
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