advertise write cache enabled when it is

Advertise device status word 85 bit 5 (write cache enabled) only when
it is.  Adapted from a related patch for xen-unstable from Samuel
Thibault.

Signed-off-by: Samuel Thibault <samuel.thibault@eu.citrix.com>
Signed-off-by: Ian Jackson <ian.jackson@eu.citrix.com>

diff --git a/hw/ide.c b/hw/ide.c
index 8348f43f5c555ee2602606082de52a6f6e101928..1f60abd0186488d2fc0202c7797ef29c2232a2ab 100644 (file)
--- a/hw/ide.c
+++ b/hw/ide.c
@@ -565,7 +565,7 @@ static void ide_identify(IDEState *s)
     /* 13=flush_cache_ext,12=flush_cache,10=lba48 */
     put_le16(p + 83, (1 << 14) | (1 << 13) | (1 <<12) | (1 << 10));
     put_le16(p + 84, (1 << 14));
-    put_le16(p + 85, (1 << 14));
+    put_le16(p + 85, (1 << 14) | (s->write_cache << 5));
     /* 13=flush_cache_ext,12=flush_cache,10=lba48 */
     put_le16(p + 86, (1 << 14) | (1 << 13) | (1 <<12) | (1 << 10));
     put_le16(p + 87, (1 << 14));