From: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Date: Tue, 23 Jun 2020 20:49:34 +0000 (+0100)
Subject: adb: only call autopoll callbacks when autopoll is not blocked
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=913f47ef96990fc72135ec604b6bb1fe2d1e389a;p=qemu.git

adb: only call autopoll callbacks when autopoll is not blocked

Handle this at the ADB bus level so that individual implementations do not need
to handle this themselves.

Finally add an assert() into adb_request() to prevent developers from accidentally
making an explicit ADB request without blocking autopoll.

Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Tested-by: Finn Thain <fthain@telegraphics.com.au>
Acked-by: Laurent Vivier <laurent@vivier.eu>
Message-Id: <20200623204936.24064-21-mark.cave-ayland@ilande.co.uk>
---

diff --git a/hw/input/adb.c b/hw/input/adb.c
index 70aa1f4570..fe0f6c7ef3 100644
--- a/hw/input/adb.c
+++ b/hw/input/adb.c
@@ -86,10 +86,11 @@ static int do_adb_request(ADBBusState *s, uint8_t *obuf, const uint8_t *buf,
 
 int adb_request(ADBBusState *s, uint8_t *obuf, const uint8_t *buf, int len)
 {
+    assert(s->autopoll_blocked);
+
     return do_adb_request(s, obuf, buf, len);
 }
 
-/* XXX: move that to cuda ? */
 int adb_poll(ADBBusState *s, uint8_t *obuf, uint16_t poll_mask)
 {
     ADBDevice *d;
@@ -181,7 +182,9 @@ static void adb_autopoll(void *opaque)
 {
     ADBBusState *s = opaque;
 
-    s->autopoll_cb(s->autopoll_cb_opaque);
+    if (!s->autopoll_blocked) {
+        s->autopoll_cb(s->autopoll_cb_opaque);
+    }
 
     timer_mod(s->autopoll_timer,
               qemu_clock_get_ms(QEMU_CLOCK_VIRTUAL) +
diff --git a/hw/misc/mac_via.c b/hw/misc/mac_via.c
index 71b6f92645..d76d7b28d3 100644
--- a/hw/misc/mac_via.c
+++ b/hw/misc/mac_via.c
@@ -615,11 +615,7 @@ static void adb_via_poll(void *opaque)
      * received, however we must block autopoll until the point where
      * the entire reply has been read back to the host
      */
-    if (adb_bus->autopoll_blocked) {
-        return;
-    } else {
-        adb_autopoll_block(adb_bus);
-    }
+    adb_autopoll_block(adb_bus);
 
     m->adb_data_in_index = 0;
     m->adb_data_out_index = 0;