maint: Fix macros with broken 'do/while(0); ' usage

The point of writing a macro embedded in a 'do { ... } while (0)'
loop (particularly if the macro has multiple statements or would
otherwise end with an 'if' statement) is so that the macro can be
used as a drop-in statement with the caller supplying the
trailing ';'.  Although our coding style frowns on brace-less 'if':
  if (cond)
    statement;
  else
    something else;
that is the classic case where failure to use do/while(0) wrapping
would cause the 'else' to pair with any embedded 'if' in the macro
rather than the intended outer 'if'.  But conversely, if the macro
includes an embedded ';', then the same brace-less coding style
would now have two statements, making the 'else' a syntax error
rather than pairing with the outer 'if'.  Thus, even though our
coding style with required braces is not impacted, ending a macro
with ';' makes our code harder to port to projects that use
brace-less styles.

The change should have no semantic impact.  I was not able to
fully compile-test all of the changes (as some of them are
examples of the ugly bit-rotting debug print statements that are
completely elided by default, and I didn't want to recompile
with the necessary -D witnesses - cleaning those up is left as a
bite-sized task for another day); I did, however, audit that for
all files touched, all callers of the changed macros DID supply
a trailing ';' at the callsite, and did not appear to be used
as part of a brace-less conditional.

Found mechanically via: $ git grep -B1 'while (0);' | grep -A1 \\\\

Signed-off-by: Eric Blake <eblake@redhat.com>
Acked-by: Cornelia Huck <cohuck@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Message-Id: <20171201232433.25193-7-eblake@redhat.com>
Reviewed-by: Juan Quintela <quintela@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

audio/paaudio.c

@@ -89,7 +89,7 @@ static inline int PA_STREAM_IS_GOOD(pa_stream_state_t x)
             }                                                   \
             goto label;                                         \
         }                                                       \
-    } while (0);
+    } while (0)
 
 #define CHECK_DEAD_GOTO(c, stream, rerror, label)                       \
     do {                                                                \
@@ -107,7 +107,7 @@ static inline int PA_STREAM_IS_GOOD(pa_stream_state_t x)
             }                                                           \
             goto label;                                                 \
         }                                                               \
-    } while (0);
+    } while (0)
 
 static int qpa_simple_read (PAVoiceIn *p, void *data, size_t length, int *rerror)
 {

hw/adc/stm32f2xx_adc.c

@@ -37,7 +37,7 @@
     if (STM_ADC_ERR_DEBUG >= lvl) { \
         qemu_log("%s: " fmt, __func__, ## args); \
     } \
-} while (0);
+} while (0)
 
 #define DB_PRINT(fmt, args...) DB_PRINT_L(1, fmt, ## args)
 

hw/block/m25p80.c

@@ -40,7 +40,7 @@
         fprintf(stderr,  ": %s: ", __func__); \
         fprintf(stderr, ## __VA_ARGS__); \
     } \
-} while (0);
+} while (0)
 
 /* Fields for FlashPartInfo->flags */
 

hw/char/cadence_uart.c

@@ -33,7 +33,7 @@
 #define DB_PRINT(...) do { \
     fprintf(stderr,  ": %s: ", __func__); \
     fprintf(stderr, ## __VA_ARGS__); \
-    } while (0);
+    } while (0)
 #else
     #define DB_PRINT(...)
 #endif

hw/char/stm32f2xx_usart.c

@@ -34,7 +34,7 @@
     if (STM_USART_ERR_DEBUG >= lvl) { \
         qemu_log("%s: " fmt, __func__, ## args); \
     } \
-} while (0);
+} while (0)
 
 #define DB_PRINT(fmt, args...) DB_PRINT_L(1, fmt, ## args)
 

hw/display/cg3.c

@@ -63,7 +63,7 @@
     if (DEBUG_CG3) { \
         printf("CG3: " fmt , ## __VA_ARGS__); \
     } \
-} while (0);
+} while (0)
 
 #define TYPE_CG3 "cgthree"
 #define CG3(obj) OBJECT_CHECK(CG3State, (obj), TYPE_CG3)

hw/display/dpcd.c

@@ -39,7 +39,7 @@
     if (DEBUG_DPCD) {                                                          \
         qemu_log("dpcd: " fmt, ## __VA_ARGS__);                                \
     }                                                                          \
-} while (0);
+} while (0)
 
 #define DPCD_READABLE_AREA                      0x600
 

hw/display/xlnx_dp.c

@@ -34,7 +34,7 @@
     if (DEBUG_DP) {                                                            \
         qemu_log("xlnx_dp: " fmt , ## __VA_ARGS__);                            \
     }                                                                          \
-} while (0);
+} while (0)
 
 /*
  * Register offset for DP.

hw/dma/pl330.c

@@ -29,7 +29,7 @@
     if (PL330_ERR_DEBUG >= lvl) {\
         fprintf(stderr, "PL330: %s:" fmt, __func__, ## args);\
     } \
-} while (0);
+} while (0)
 
 #define DB_PRINT(fmt, args...) DB_PRINT_L(1, fmt, ## args)
 

hw/dma/xlnx-zynq-devcfg.c

@@ -43,7 +43,7 @@
     if (XLNX_ZYNQ_DEVCFG_ERR_DEBUG) { \
         qemu_log("%s: " fmt, __func__, ## args); \
     } \
-} while (0);
+} while (0)
 
 REG32(CTRL, 0x00)
     FIELD(CTRL,     FORCE_RST,          31,  1) /* Not supported, wr ignored */

hw/dma/xlnx_dpdma.c

@@ -34,7 +34,7 @@
     if (DEBUG_DPDMA) {                                                         \
         qemu_log("xlnx_dpdma: " fmt , ## __VA_ARGS__);                         \
     }                                                                          \
-} while (0);
+} while (0)
 
 /*
  * Registers offset for DPDMA.

hw/i2c/i2c-ddc.c

@@ -30,7 +30,7 @@
     if (DEBUG_I2CDDC) {                                                        \
         qemu_log("i2c-ddc: " fmt , ## __VA_ARGS__);                            \
     }                                                                          \
-} while (0);
+} while (0)
 
 /* Structure defining a monitor's characteristics in a
  * readable format: this should be passed to build_edid_blob()

hw/misc/auxbus.c

@@ -40,7 +40,7 @@
     if (DEBUG_AUX) {                                                           \
         qemu_log("aux: " fmt , ## __VA_ARGS__);                                \
     }                                                                          \
-} while (0);
+} while (0)
 
 #define TYPE_AUXTOI2C "aux-to-i2c-bridge"
 #define AUXTOI2C(obj) OBJECT_CHECK(AUXTOI2CState, (obj), TYPE_AUXTOI2C)

hw/misc/macio/mac_dbdma.c

@@ -52,7 +52,7 @@
     if (DEBUG_DBDMA) { \
         printf("DBDMA: " fmt , ## __VA_ARGS__); \
     } \
-} while (0);
+} while (0)
 
 #define DBDMA_DPRINTFCH(ch, fmt, ...) do { \
     if (DEBUG_DBDMA) { \
@@ -60,7 +60,7 @@
             printf("DBDMA[%02x]: " fmt , (ch)->channel, ## __VA_ARGS__); \
         } \
     } \
-} while (0);
+} while (0)
 
 /*
  */

hw/misc/mmio_interface.c

@@ -39,7 +39,7 @@ static uint64_t mmio_interface_counter;
     if (DEBUG_MMIO_INTERFACE) {                                                \
         qemu_log("mmio_interface: 0x%" PRIX64 ": " fmt, s->id, ## __VA_ARGS__);\
     }                                                                          \
-} while (0);
+} while (0)
 
 static void mmio_interface_init(Object *obj)
 {

hw/misc/stm32f2xx_syscfg.c

@@ -34,7 +34,7 @@
     if (STM_SYSCFG_ERR_DEBUG >= lvl) { \
         qemu_log("%s: " fmt, __func__, ## args); \
     } \
-} while (0);
+} while (0)
 
 #define DB_PRINT(fmt, args...) DB_PRINT_L(1, fmt, ## args)
 

hw/misc/zynq_slcr.c

@@ -30,7 +30,7 @@
             fprintf(stderr,  ": %s: ", __func__); \
             fprintf(stderr, ## __VA_ARGS__); \
         } \
-    } while (0);
+    } while (0)
 
 #define XILINX_LOCK_KEY 0x767b
 #define XILINX_UNLOCK_KEY 0xdf0d

hw/net/cadence_gem.c

@@ -34,7 +34,7 @@
 #define DB_PRINT(...) do { \
     fprintf(stderr,  ": %s: ", __func__); \
     fprintf(stderr, ## __VA_ARGS__); \
-    } while (0);
+    } while (0)
 #else
     #define DB_PRINT(...)
 #endif

hw/ssi/mss-spi.c

@@ -35,7 +35,7 @@
     if (MSS_SPI_ERR_DEBUG >= lvl) { \
         qemu_log("%s: " fmt "\n", __func__, ## args); \
     } \
-} while (0);
+} while (0)
 
 #define DB_PRINT(fmt, args...) DB_PRINT_L(1, fmt, ## args)
 

hw/ssi/stm32f2xx_spi.c

@@ -35,7 +35,7 @@
     if (STM_SPI_ERR_DEBUG >= lvl) { \
         qemu_log("%s: " fmt, __func__, ## args); \
     } \
-} while (0);
+} while (0)
 
 #define DB_PRINT(fmt, args...) DB_PRINT_L(1, fmt, ## args)