Compress lines for immediate return

Compress two lines into a single line if immediate return statement is found.

It also remove variables progress, val, data, ret and sock
as they are no longer needed.

Remove space between function "mixer_load" and '(' to fix the
checkpatch.pl error:-
ERROR: space prohibited between function name and open parenthesis '('

Done using following coccinelle script:
@@
local idexpression ret;
expression e;
@@

-ret =
+return
     e;
-return ret;

Signed-off-by: Simran Singhal <singhalsimran0@gmail.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-Id: <20200401165314.GA3213@simran-Inspiron-5558>
[lv: in handle_aiocb_write_zeroes_unmap() move "int ret" inside the #ifdef]
Signed-off-by: Laurent Vivier <laurent@vivier.eu>

block/file-posix.c

@@ -1617,22 +1617,20 @@ static int handle_aiocb_write_zeroes_unmap(void *opaque)
 {
     RawPosixAIOData *aiocb = opaque;
     BDRVRawState *s G_GNUC_UNUSED = aiocb->bs->opaque;
-    int ret;
 
     /* First try to write zeros and unmap at the same time */
 
 #ifdef CONFIG_FALLOCATE_PUNCH_HOLE
-    ret = do_fallocate(s->fd, FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE,
-                       aiocb->aio_offset, aiocb->aio_nbytes);
+    int ret = do_fallocate(s->fd, FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE,
+                           aiocb->aio_offset, aiocb->aio_nbytes);
     if (ret != -ENOTSUP) {
         return ret;
     }
 #endif
 
     /* If we couldn't manage to unmap while guaranteed that the area reads as
      * all-zero afterwards, just write zeroes without unmapping */
-    ret = handle_aiocb_write_zeroes(aiocb);
-    return ret;
+    return handle_aiocb_write_zeroes(aiocb);
 }
 
 #ifndef HAVE_COPY_FILE_RANGE

block/nfs.c

@@ -623,8 +623,7 @@ static int nfs_file_open(BlockDriverState *bs, QDict *options, int flags,
     }
 
     bs->total_sectors = ret;
-    ret = 0;
-    return ret;
+    return 0;
 }
 
 static QemuOptsList nfs_create_opts = {

block/nvme.c

@@ -575,11 +575,9 @@ static bool nvme_poll_cb(void *opaque)
 {
     EventNotifier *e = opaque;
     BDRVNVMeState *s = container_of(e, BDRVNVMeState, irq_notifier);
-    bool progress = false;
 
     trace_nvme_poll_cb(s);
-    progress = nvme_poll_queues(s);
-    return progress;
+    return nvme_poll_queues(s);
 }
 
 static int nvme_init(BlockDriverState *bs, const char *device, int namespace,

block/vhdx.c

@@ -411,8 +411,7 @@ int vhdx_update_headers(BlockDriverState *bs, BDRVVHDXState *s,
     if (ret < 0) {
         return ret;
     }
-    ret = vhdx_update_header(bs, s, generate_data_write_guid, log_guid);
-    return ret;
+    return vhdx_update_header(bs, s, generate_data_write_guid, log_guid);
 }
 
 /* opens the specified header block from the VHDX file header section */

hw/audio/ac97.c

@@ -573,11 +573,9 @@ static uint32_t nam_readb (void *opaque, uint32_t addr)
 static uint32_t nam_readw (void *opaque, uint32_t addr)
 {
     AC97LinkState *s = opaque;
-    uint32_t val = ~0U;
     uint32_t index = addr;
     s->cas = 0;
-    val = mixer_load (s, index);
-    return val;
+    return mixer_load(s, index);
 }
 
 static uint32_t nam_readl (void *opaque, uint32_t addr)

hw/audio/adlib.c

@@ -120,13 +120,10 @@ static void adlib_write(void *opaque, uint32_t nport, uint32_t val)
 static uint32_t adlib_read(void *opaque, uint32_t nport)
 {
     AdlibState *s = opaque;
-    uint8_t data;
     int a = nport & 3;
 
     adlib_kill_timers (s);
-    data = OPLRead (s->opl, a);
-
-    return data;
+    return OPLRead (s->opl, a);
 }
 
 static void timer_handler (void *opaque, int c, double interval_Sec)

hw/display/cirrus_vga.c

@@ -2411,12 +2411,10 @@ static uint64_t cirrus_linear_bitblt_read(void *opaque,
                                           unsigned size)
 {
     CirrusVGAState *s = opaque;
-    uint32_t ret;
 
     /* XXX handle bitblt */
     (void)s;
-    ret = 0xff;
-    return ret;
+    return 0xff;
 }
 
 static void cirrus_linear_bitblt_write(void *opaque,

migration/ram.c

@@ -2135,9 +2135,7 @@ int ram_postcopy_send_discard_bitmap(MigrationState *ms)
     }
     trace_ram_postcopy_send_discard_bitmap();
 
-    ret = postcopy_each_ram_send_discard(ms);
-
-    return ret;
+    return postcopy_each_ram_send_discard(ms);
 }
 
 /**

ui/gtk.c

@@ -1650,8 +1650,7 @@ static GSList *gd_vc_menu_init(GtkDisplayState *s, VirtualConsole *vc,
                      G_CALLBACK(gd_menu_switch_vc), s);
     gtk_menu_shell_append(GTK_MENU_SHELL(view_menu), vc->menu_item);
 
-    group = gtk_radio_menu_item_get_group(GTK_RADIO_MENU_ITEM(vc->menu_item));
-    return group;
+    return gtk_radio_menu_item_get_group(GTK_RADIO_MENU_ITEM(vc->menu_item));
 }
 
 #if defined(CONFIG_VTE)

util/qemu-sockets.c

@@ -765,15 +765,12 @@ static int vsock_connect_addr(const struct sockaddr_vm *svm, Error **errp)
 static int vsock_connect_saddr(VsockSocketAddress *vaddr, Error **errp)
 {
     struct sockaddr_vm svm;
-    int sock = -1;
 
     if (!vsock_parse_vaddr_to_sockaddr(vaddr, &svm, errp)) {
         return -1;
     }
 
-    sock = vsock_connect_addr(&svm, errp);
-
-    return sock;
+    return vsock_connect_addr(&svm, errp);
 }
 
 static int vsock_listen_saddr(VsockSocketAddress *vaddr,