Wire up the ATA SETFEATURES subcalls that control the volatile write cache
to the new bdrv_change_cache helper.
Signed-off-by: Christoph Hellwig <h...@lst.de>
Index: qemu/hw/ide/core.c
===================================================================
--- qemu.orig/hw/ide/core.c 2011-03-15 11:47:18.569636140 +0100
+++ qemu/hw/ide/core.c 2011-03-15 13:07:21.464634347 +0100
@@ -1700,6 +1700,19 @@ void ide_ioport_write(void *opaque, uint
}
}
+static void ide_setcache(IDEState *s, bool enable)
+{
+ if (bdrv_change_cache(s->bs, enable)) {
+ ide_abort_command(s);
+ ide_set_irq(s->bus);
+ return;
+ }
+
+ s->identify_set = 0;
+
+ s->status = READY_STAT | SEEK_STAT;
+ ide_set_irq(s->bus);
+}
void ide_exec_cmd(IDEBus *bus, uint32_t val)
{
@@ -1855,7 +1868,11 @@ void ide_exec_cmd(IDEBus *bus, uint32_t
case 0xcc: /* reverting to power-on defaults enable */
case 0x66: /* reverting to power-on defaults disable */
case 0x02: /* write cache enable */
+ ide_setcache(s, true);
+ break;
case 0x82: /* write cache disable */
+ ide_setcache(s, false);
+ break;
case 0xaa: /* read look-ahead enable */
case 0x55: /* read look-ahead disable */
case 0x05: /* set advanced power management mode */
