Fix remaining warnings from Sparse (void return)

Sparse report:

hw/display/vga.c:2000:5: warning: returning void-valued expression
hw/intc/arm_gic.c:707:9: warning: returning void-valued expression
hw/intc/etraxfs_pic.c:138:9: warning: returning void-valued expression
hw/nvram/fw_cfg.c:475:5: warning: returning void-valued expression
hw/timer/a9gtimer.c:124:5: warning: returning void-valued expression
hw/tpm/tpm_tis.c:794:5: warning: returning void-valued expression
hw/usb/hcd-musb.c:558:9: warning: returning void-valued expression
hw/usb/hcd-musb.c:776:13: warning: returning void-valued expression
hw/usb/hcd-musb.c:867:5: warning: returning void-valued expression
hw/usb/hcd-musb.c:932:5: warning: returning void-valued expression
include/qom/cpu.h:584:5: warning: returning void-valued expression
monitor.c:4686:13: warning: returning void-valued expression
monitor.c:4690:13: warning: returning void-valued expression

Cc: Edgar E. Iglesias <edgar.iglesias@gmail.com>
Cc: Gerd Hoffmann <kraxel@redhat.com>
Cc: Andreas Färber <afaerber@suse.de>
Cc: Luiz Capitulino <lcapitulino@redhat.com>
Signed-off-by: NStefan Weil <sw@weilnetz.de>
Signed-off-by: NMichael Tokarev <mjt@tls.msk.ru>

hw/display/vga.c

@@ -1997,7 +1997,7 @@ static void vga_mem_write(void *opaque, hwaddr addr,
 {
     VGACommonState *s = opaque;
 
-    return vga_mem_writeb(s, addr, data);
+    vga_mem_writeb(s, addr, data);
 }
 
 const MemoryRegionOps vga_mem_ops = {

hw/intc/arm_gic.c

@@ -704,7 +704,8 @@ static void gic_cpu_write(GICState *s, int cpu, int offset, uint32_t value)
         s->bpr[cpu] = (value & 0x7);
         break;
     case 0x10: /* End Of Interrupt */
-        return gic_complete_irq(s, cpu, value & 0x3ff);
+        gic_complete_irq(s, cpu, value & 0x3ff);
+        return;
     case 0x1c: /* Aliased Binary Point */
         if (s->revision >= 2) {
             s->abpr[cpu] = (value & 0x7);

hw/intc/etraxfs_pic.c

@@ -131,11 +131,13 @@ static void nmi_handler(void *opaque, int irq, int level)
 }
 
 static void irq_handler(void *opaque, int irq, int level)
-{   
+{
     struct etrax_pic *fs = (void *)opaque;
 
-    if (irq >= 30)
-        return nmi_handler(opaque, irq, level);
+    if (irq >= 30) {
+        nmi_handler(opaque, irq, level);
+        return;
+    }
 
     irq -= 1;
     fs->regs[R_R_VECT] &= ~(1 << irq);

hw/nvram/fw_cfg.c

@@ -472,7 +472,7 @@ void fw_cfg_add_string(FWCfgState *s, uint16_t key, const char *value)
 {
     size_t sz = strlen(value) + 1;
 
-    return fw_cfg_add_bytes(s, key, g_memdup(value, sz), sz);
+    fw_cfg_add_bytes(s, key, g_memdup(value, sz), sz);
 }
 
 void fw_cfg_add_i16(FWCfgState *s, uint16_t key, uint16_t value)

hw/timer/a9gtimer.c

@@ -121,7 +121,7 @@ static void a9_gtimer_update_no_sync(void *opaque)
 {
     A9GTimerState *s = A9_GTIMER(opaque);
 
-    return a9_gtimer_update(s, false);
+    a9_gtimer_update(s, false);
 }
 
 static uint64_t a9_gtimer_read(void *opaque, hwaddr addr, unsigned size)

hw/tpm/tpm_tis.c

@@ -868,7 +868,7 @@ static void tpm_tis_mmio_write_intern(void *opaque, hwaddr addr,
 static void tpm_tis_mmio_write(void *opaque, hwaddr addr,
                                uint64_t val, unsigned size)
 {
-    return tpm_tis_mmio_write_intern(opaque, addr, val, size, false);
+    tpm_tis_mmio_write_intern(opaque, addr, val, size, false);
 }
 
 static const MemoryRegionOps tpm_tis_memory_ops = {

hw/usb/hcd-musb.c

@@ -554,8 +554,10 @@ static void musb_schedule_cb(USBPort *port, USBPacket *packey)
         timeout = ep->timeout[dir];
     else if (ep->interrupt[dir])
         timeout = 8;
-    else
-        return musb_cb_tick(ep);
+    else {
+        musb_cb_tick(ep);
+        return;
+    }
 
     if (!ep->intv_timer[dir])
         ep->intv_timer[dir] = timer_new_ns(QEMU_CLOCK_VIRTUAL, musb_cb_tick, ep);
@@ -772,9 +774,11 @@ static void musb_rx_packet_complete(USBPacket *packey, void *opaque)
 
         /* NAK timeouts are only generated in Bulk transfers and
          * Data-errors in Isochronous.  */
-        if (ep->interrupt[1])
-            return musb_packet(s, ep, epnum, USB_TOKEN_IN,
-                            packey->iov.size, musb_rx_packet_complete, 1);
+        if (ep->interrupt[1]) {
+            musb_packet(s, ep, epnum, USB_TOKEN_IN,
+                        packey->iov.size, musb_rx_packet_complete, 1);
+            return;
+        }
 
         ep->csr[1] |= MGC_M_RXCSR_DATAERROR;
         if (!epnum)
@@ -864,8 +868,7 @@ static void musb_tx_rdy(MUSBState *s, int epnum)
          * but it doesn't make sense for us to do that.  */
     }
 
-    return musb_packet(s, ep, epnum, pid,
-                    total, musb_tx_packet_complete, 0);
+    musb_packet(s, ep, epnum, pid, total, musb_tx_packet_complete, 0);
 }
 
 static void musb_rx_req(MUSBState *s, int epnum)
@@ -929,8 +932,7 @@ static void musb_rx_req(MUSBState *s, int epnum)
     }
 #endif
 
-    return musb_packet(s, ep, epnum, USB_TOKEN_IN,
-                    total, musb_rx_packet_complete, 1);
+    musb_packet(s, ep, epnum, USB_TOKEN_IN, total, musb_rx_packet_complete, 1);
 }
 
 static uint8_t musb_read_fifo(MUSBEndPoint *ep)

include/qom/cpu.h

@@ -593,7 +593,7 @@ static inline void cpu_unaligned_access(CPUState *cpu, vaddr addr,
 {
     CPUClass *cc = CPU_GET_CLASS(cpu);
 
-    return cc->do_unaligned_access(cpu, addr, is_write, is_user, retaddr);
+    cc->do_unaligned_access(cpu, addr, is_write, is_user, retaddr);
 }
 #endif
 

monitor.c

@@ -4691,11 +4691,13 @@ static void monitor_find_completion_by_table(Monitor *mon,
 
         if (cmd->sub_table) {
             /* do the job again */
-            return monitor_find_completion_by_table(mon, cmd->sub_table,
-                                                    &args[1], nb_args - 1);
+            monitor_find_completion_by_table(mon, cmd->sub_table,
+                                             &args[1], nb_args - 1);
+            return;
         }
         if (cmd->command_completion) {
-            return cmd->command_completion(mon->rs, nb_args, args[nb_args - 1]);
+            cmd->command_completion(mon->rs, nb_args, args[nb_args - 1]);
+            return;
         }
 
         ptype = next_arg_type(cmd->args_type);