char: replace PROP_CHR with CharBackend

Store the property in a CharBackend instead of CharDriverState*.  This
also replace systematically chr by chr.chr to access the
CharDriverState*. The following patches will replace it with calls to
qemu_chr_fe CharBackend functions.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20161022095318.17775-12-marcandre.lureau@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

1 files changed, 10 insertions, 9 deletions

diff --git a/hw/char/imx_serial.c b/hw/char/imx_serial.c
index 5c3fa61e4c..5c11de2cbe 100644
--- a/hw/char/imx_serial.c
+++ b/hw/char/imx_serial.c
@@ -121,8 +121,8 @@ static uint64_t imx_serial_read(void *opaque, hwaddr offset,
             s->usr2 &= ~USR2_RDR;
             s->uts1 |= UTS1_RXEMPTY;
             imx_update(s);
-            if (s->chr) {
-                qemu_chr_accept_input(s->chr);
+            if (s->chr.chr) {
+                qemu_chr_accept_input(s->chr.chr);
             }
         }
         return c;
@@ -175,16 +175,17 @@ static void imx_serial_write(void *opaque, hwaddr offset,
     unsigned char ch;
 
     DPRINTF("write(offset=0x%" HWADDR_PRIx ", value = 0x%x) to %s\n",
-            offset, (unsigned int)value, s->chr ? s->chr->label : "NODEV");
+            offset, (unsigned int)value,
+            s->chr.chr ? s->chr.chr->label : "NODEV");
 
     switch (offset >> 2) {
     case 0x10: /* UTXD */
         ch = value;
         if (s->ucr2 & UCR2_TXEN) {
-            if (s->chr) {
+            if (s->chr.chr) {
                 /* XXX this blocks entire thread. Rewrite to use
                  * qemu_chr_fe_write and background I/O callbacks */
-                qemu_chr_fe_write_all(s->chr, &ch, 1);
+                qemu_chr_fe_write_all(s->chr.chr, &ch, 1);
             }
             s->usr1 &= ~USR1_TRDY;
             imx_update(s);
@@ -214,8 +215,8 @@ static void imx_serial_write(void *opaque, hwaddr offset,
         }
         if (value & UCR2_RXEN) {
             if (!(s->ucr2 & UCR2_RXEN)) {
-                if (s->chr) {
-                    qemu_chr_accept_input(s->chr);
+                if (s->chr.chr) {
+                    qemu_chr_accept_input(s->chr.chr);
                 }
             }
         }
@@ -318,8 +319,8 @@ static void imx_serial_realize(DeviceState *dev, Error **errp)
 {
     IMXSerialState *s = IMX_SERIAL(dev);
 
-    if (s->chr) {
-        qemu_chr_add_handlers(s->chr, imx_can_receive, imx_receive,
+    if (s->chr.chr) {
+        qemu_chr_add_handlers(s->chr.chr, imx_can_receive, imx_receive,
                               imx_event, s);
     } else {
         DPRINTF("No char dev for uart\n");