Remove dead assignments in various common files, spotted by clang analyzer

Value stored is never read.

Signed-off-by: Blue Swirl <blauwirbel@gmail.com>

6 files changed, 10 insertions, 15 deletions

diff --git a/console.c b/console.c
index 8bcd00b470..7070b1b1ad 100644
--- a/console.c
+++ b/console.c
@@ -829,7 +829,6 @@ static void console_clear_xy(TextConsole *s, int x, int y)
     TextCell *c = &s->cells[y1 * s->width + x];
     c->ch = ' ';
     c->t_attrib = s->t_attrib_default;
-    c++;
     update_xy(s, x, y);
 }
 
diff --git a/hw/xen_disk.c b/hw/xen_disk.c
index 95017a1f5c..9a466f3cc1 100644
--- a/hw/xen_disk.c
+++ b/hw/xen_disk.c
@@ -575,7 +575,7 @@ static void blk_alloc(struct XenDevice *xendev)
 static int blk_init(struct XenDevice *xendev)
 {
     struct XenBlkDev *blkdev = container_of(xendev, struct XenBlkDev, xendev);
-    int index, mode, qflags, have_barriers, info = 0;
+    int index, qflags, have_barriers, info = 0;
     char *h;
 
     /* read xenstore entries */
@@ -609,10 +609,8 @@ static int blk_init(struct XenDevice *xendev)
 
     /* read-only ? */
     if (strcmp(blkdev->mode, "w") == 0) {
-	mode   = O_RDWR;
 	qflags = BDRV_O_RDWR;
     } else {
-	mode   = O_RDONLY;
 	qflags = 0;
 	info  |= VDISK_READONLY;
     }
diff --git a/net/tap.c b/net/tap.c
index 303d69f5ab..0147dabc15 100644
--- a/net/tap.c
+++ b/net/tap.c
@@ -346,7 +346,7 @@ static int launch_script(const char *setup_script, const char *ifname, int fd)
         parg = args;
         *parg++ = (char *)setup_script;
         *parg++ = (char *)ifname;
-        *parg++ = NULL;
+        *parg = NULL;
         execv(setup_script, args);
         _exit(1);
     } else if (pid > 0) {
diff --git a/slirp/cksum.c b/slirp/cksum.c
index c3b45f7b3d..48a1792199 100644
--- a/slirp/cksum.c
+++ b/slirp/cksum.c
@@ -110,7 +110,6 @@ int cksum(struct mbuf *m, int len)
 	if (byte_swapped) {
 		REDUCE;
 		sum <<= 8;
-		byte_swapped = 0;
 		if (mlen == -1) {
 			s_util.c[1] = *(u_int8_t *)w;
 			sum += s_util.s;
diff --git a/tcg/tcg.c b/tcg/tcg.c
index 54f7fa9296..beceff0c3c 100644
--- a/tcg/tcg.c
+++ b/tcg/tcg.c
@@ -550,14 +550,18 @@ void tcg_register_helper(void *func, const char *name)
 void tcg_gen_callN(TCGContext *s, TCGv_ptr func, unsigned int flags,
                    int sizemask, TCGArg ret, int nargs, TCGArg *args)
 {
+#ifdef TCG_TARGET_I386
     int call_type;
+#endif
     int i;
     int real_args;
     int nb_rets;
     TCGArg *nparam;
     *gen_opc_ptr++ = INDEX_op_call;
     nparam = gen_opparam_ptr++;
+#ifdef TCG_TARGET_I386
     call_type = (flags & TCG_CALL_TYPE_MASK);
+#endif
     if (ret != TCG_CALL_DUMMY_ARG) {
 #if TCG_TARGET_REG_BITS < 64
         if (sizemask & 1) {
diff --git a/vnc.c b/vnc.c
index 9ba603c690..d332099ffd 100644
--- a/vnc.c
+++ b/vnc.c
@@ -1234,17 +1234,16 @@ static long vnc_client_write_plain(VncState *vs)
  */
 void vnc_client_write(void *opaque)
 {
-    long ret;
     VncState *vs = opaque;
 
 #ifdef CONFIG_VNC_SASL
     if (vs->sasl.conn &&
         vs->sasl.runSSF &&
-        !vs->sasl.waitWriteSSF)
-        ret = vnc_client_write_sasl(vs);
-    else
+        !vs->sasl.waitWriteSSF) {
+        vnc_client_write_sasl(vs);
+    } else
 #endif /* CONFIG_VNC_SASL */
-        ret = vnc_client_write_plain(vs);
+        vnc_client_write_plain(vs);
 }
 
 void vnc_read_when(VncState *vs, VncReadEvent *func, size_t expecting)
@@ -1725,12 +1724,8 @@ static void framebuffer_update_request(VncState *vs, int incremental,
                                        int x_position, int y_position,
                                        int w, int h)
 {
-    if (x_position > ds_get_width(vs->ds))
-        x_position = ds_get_width(vs->ds);
     if (y_position > ds_get_height(vs->ds))
         y_position = ds_get_height(vs->ds);
-    if (x_position + w >= ds_get_width(vs->ds))
-        w = ds_get_width(vs->ds)  - x_position;
     if (y_position + h >= ds_get_height(vs->ds))
         h = ds_get_height(vs->ds) - y_position;