[Qemu-devel] [PATCH 1/2] hw/sd: Add medium insertion status

[Max Reitz <mreitz@redhat.com>]

Right now, the change_media_cb (sd_cardchange()) completely ignores its
@load parameter. This means that issuing a blockdev-open-tray command
will actually not have any effect.

Fix this by keeping track of the medium insertion status in the SDState
and updating it in sd_init() and sd_cardchange().

Cc: qemu-stable <qemu-stable@nongnu.org>
Signed-off-by: Max Reitz <mreitz@redhat.com>
---
 hw/sd/sd.c | 16 ++++++++++------
 1 file changed, 10 insertions(+), 6 deletions(-)

diff --git a/hw/sd/sd.c b/hw/sd/sd.c
index 1a9935c..0751ba2 100644
--- a/hw/sd/sd.c
+++ b/hw/sd/sd.c
@@ -114,6 +114,7 @@ struct SDState {
     uint8_t *buf;
 
     bool enable;
+    bool medium_inserted;
 };
 
 static void sd_set_mode(SDState *sd)
@@ -429,8 +430,10 @@ static void sd_cardchange(void *opaque, bool load)
 {
     SDState *sd = opaque;
 
-    qemu_set_irq(sd->inserted_cb, blk_is_inserted(sd->blk));
-    if (blk_is_inserted(sd->blk)) {
+    sd->medium_inserted = load && blk_is_inserted(sd->blk);
+
+    qemu_set_irq(sd->inserted_cb, sd->medium_inserted);
+    if (sd->medium_inserted) {
         sd_reset(sd);
         qemu_set_irq(sd->readonly_cb, sd->wp_switch);
     }
@@ -497,6 +500,7 @@ SDState *sd_init(BlockBackend *blk, bool is_spi)
         /* FIXME ignoring blk_attach_dev() failure is dangerously brittle */
         blk_attach_dev(sd->blk, sd);
         blk_set_dev_ops(sd->blk, &sd_block_ops, sd);
+        sd->medium_inserted = blk_is_inserted(sd->blk);
     }
     vmstate_register(NULL, -1, &sd_vmstate, sd);
     return sd;
@@ -507,7 +511,7 @@ void sd_set_cb(SDState *sd, qemu_irq readonly, qemu_irq insert)
     sd->readonly_cb = readonly;
     sd->inserted_cb = insert;
     qemu_set_irq(readonly, sd->blk ? blk_is_read_only(sd->blk) : 0);
-    qemu_set_irq(insert, sd->blk ? blk_is_inserted(sd->blk) : 0);
+    qemu_set_irq(insert, sd->blk ? sd->medium_inserted : 0);
 }
 
 static void sd_erase(SDState *sd)
@@ -1349,7 +1353,7 @@ int sd_do_command(SDState *sd, SDRequest *req,
     sd_rsp_type_t rtype;
     int rsplen;
 
-    if (!sd->blk || !blk_is_inserted(sd->blk) || !sd->enable) {
+    if (!sd->blk || !sd->medium_inserted || !sd->enable) {
         return 0;
     }
 
@@ -1517,7 +1521,7 @@ void sd_write_data(SDState *sd, uint8_t value)
 {
     int i;
 
-    if (!sd->blk || !blk_is_inserted(sd->blk) || !sd->enable)
+    if (!sd->blk || !sd->medium_inserted || !sd->enable)
         return;
 
     if (sd->state != sd_receivingdata_state) {
@@ -1643,7 +1647,7 @@ uint8_t sd_read_data(SDState *sd)
     uint8_t ret;
     int io_len;
 
-    if (!sd->blk || !blk_is_inserted(sd->blk) || !sd->enable)
+    if (!sd->blk || !sd->medium_inserted || !sd->enable)
         return 0x00;
 
     if (sd->state != sd_sendingdata_state) {
-- 
2.6.4