[Qemu-devel] [PATCH v2 1/6] ide: Prohibit RESET on IDE drives

[John Snow <jsnow@redhat.com>]

This command is meant for ATAPI devices only, prohibit acknowledging it with
a command aborted response when an IDE device is busy.

Signed-off-by: John Snow <jsnow@redhat.com>
---
 hw/ide/core.c | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/hw/ide/core.c b/hw/ide/core.c
index da3baab..d121f3d 100644
--- a/hw/ide/core.c
+++ b/hw/ide/core.c
@@ -1876,9 +1876,13 @@ void ide_exec_cmd(IDEBus *bus, uint32_t val)
         return;
     }
 
-    /* Only DEVICE RESET is allowed while BSY or/and DRQ are set */
-    if ((s->status & (BUSY_STAT|DRQ_STAT)) && val != WIN_DEVICE_RESET)
-        return;
+    /* Only RESET is allowed while BSY and/or DRQ are set,
+     * and only to ATAPI devices. */
+    if (s->status & (BUSY_STAT|DRQ_STAT)) {
+        if (val != WIN_DEVICE_RESET || s->drive_kind != IDE_CD) {
+            return;
+        }
+    }
 
     if (!ide_cmd_permitted(s, val)) {
         ide_abort_command(s);
-- 
2.4.3