fix "Missing break in switch" coverity reports

Many of these are marked as "intentional/fix required" because they
just need adding a fall through comment.  This is exactly what this
patch does, except for target/mips/translate.c where it is easier to
duplicate the code, and hw/audio/sb16.c where I consulted the DOSBox
sources and decide to just remove the LOG_UNIMP before the fallthrough.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

7 files changed, 15 insertions, 5 deletions

diff --git a/hw/arm/pxa2xx.c b/hw/arm/pxa2xx.c
index b67b0cefb6..f598a1c053 100644
--- a/hw/arm/pxa2xx.c
+++ b/hw/arm/pxa2xx.c
@@ -409,7 +409,7 @@ static uint64_t pxa2xx_mm_read(void *opaque, hwaddr addr,
     case MDCNFG ... SA1110:
         if ((addr & 3) == 0)
             return s->mm_regs[addr >> 2];
-
+        /* fall through */
     default:
         printf("%s: Bad register " REG_FMT "\n", __func__, addr);
         break;
diff --git a/hw/audio/cs4231a.c b/hw/audio/cs4231a.c
index aaebec1839..9089dcb47e 100644
--- a/hw/audio/cs4231a.c
+++ b/hw/audio/cs4231a.c
@@ -305,6 +305,7 @@ static void cs_reset_voices (CSState *s, uint32_t val)
 
     case 6:
         as.endianness = 1;
+        /* fall through */
     case 2:
         as.fmt = AUD_FMT_S16;
         s->shift = as.nchannels;
diff --git a/hw/audio/gusemu_hal.c b/hw/audio/gusemu_hal.c
index 1150fc4426..ae40ca341c 100644
--- a/hw/audio/gusemu_hal.c
+++ b/hw/audio/gusemu_hal.c
@@ -261,6 +261,7 @@ void gus_write(GUSEmuState * state, int port, int size, unsigned int data)
             GUSregb(IRQStatReg2x6) = 0x10;
             GUS_irqrequest(state, state->gusirq, 1);
         }
+        /* fall through */
     case 0x20D:                /* SB2xCd no IRQ */
         GUSregb(SB2xCd) = (uint8_t) data;
         break;
diff --git a/hw/audio/sb16.c b/hw/audio/sb16.c
index 5a4d32364e..c5b9bf79e8 100644
--- a/hw/audio/sb16.c
+++ b/hw/audio/sb16.c
@@ -741,10 +741,15 @@ static void complete (SB16State *s)
             ldebug ("set time const %d\n", s->time_const);
             break;
 
-        case 0x42:              /* FT2 sets output freq with this, go figure */
-            qemu_log_mask(LOG_UNIMP, "cmd 0x42 might not do what it think it"
-                          " should\n");
         case 0x41:
+        case 0x42:
+            /*
+             * 0x41 is documented as setting the output sample rate,
+             * and 0x42 the input sample rate, but in fact SB16 hardware
+             * seems to have only a single sample rate under the hood,
+             * and FT2 sets output freq with this (go figure).  Compare:
+             * http://homepages.cae.wisc.edu/~brodskye/sb16doc/sb16doc.html#SamplingRate
+             */
             s->freq = dsp_get_hilo (s);
             ldebug ("set freq %d\n", s->freq);
             break;
diff --git a/hw/display/cg3.c b/hw/display/cg3.c
index 6fff4852c5..1c199ab369 100644
--- a/hw/display/cg3.c
+++ b/hw/display/cg3.c
@@ -232,6 +232,7 @@ static void cg3_reg_write(void *opaque, hwaddr addr, uint64_t val,
                 s->b[s->dac_index] = regval;
                 /* Index autoincrement */
                 s->dac_index = (s->dac_index + 1) & 0xff;
+                /* fall through */
             default:
                 s->dac_state = 0;
                 break;
diff --git a/hw/display/cirrus_vga.c b/hw/display/cirrus_vga.c
index 7583b18c29..04c87c8e8d 100644
--- a/hw/display/cirrus_vga.c
+++ b/hw/display/cirrus_vga.c
@@ -1426,7 +1426,8 @@ static void cirrus_vga_write_sr(CirrusVGAState * s, uint32_t val)
         s->vga.hw_cursor_y = (val << 3) | (s->vga.sr_index >> 5);
 	break;
     case 0x07:			// Extended Sequencer Mode
-    cirrus_update_memory_access(s);
+        cirrus_update_memory_access(s);
+        /* fall through */
     case 0x08:			// EEPROM Control
     case 0x09:			// Scratch Register 0
     case 0x0a:			// Scratch Register 1
diff --git a/hw/timer/sh_timer.c b/hw/timer/sh_timer.c
index 5f8736cf10..91b18ba312 100644
--- a/hw/timer/sh_timer.c
+++ b/hw/timer/sh_timer.c
@@ -74,6 +74,7 @@ static uint32_t sh_timer_read(void *opaque, hwaddr offset)
     case OFFSET_TCPR:
         if (s->feat & TIMER_FEAT_CAPT)
             return s->tcpr;
+        /* fall through */
     default:
         hw_error("sh_timer_read: Bad offset %x\n", (int)offset);
         return 0;