diff mbox

[5/5] ide: fix device_reset to not ignore pending AIO

Message ID 1453179117-17909-6-git-send-email-jsnow@redhat.com (mailing list archive)
State New, archived
Headers show

Commit Message

John Snow Jan. 19, 2016, 4:51 a.m. UTC 
Signed-off-by: John Snow <jsnow@redhat.com>
---
 hw/ide/core.c | 27 +++++++++++++++++----------
 1 file changed, 17 insertions(+), 10 deletions(-)
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Patch

diff --git a/hw/ide/core.c b/hw/ide/core.c
index 4b4bfe5..f728d43 100644
--- a/hw/ide/core.c
+++ b/hw/ide/core.c
@@ -502,7 +502,6 @@  void ide_transfer_stop(IDEState *s)
     ide_transfer_halt(s, ide_transfer_stop, true);
 }
 
-__attribute__((__unused__))
 static void ide_transfer_cancel(IDEState *s)
 {
     ide_transfer_halt(s, ide_transfer_cancel, false);
@@ -1295,6 +1294,23 @@  static bool cmd_nop(IDEState *s, uint8_t cmd)
     return true;
 }
 
+static bool cmd_device_reset(IDEState *s, uint8_t cmd)
+{
+    /* Halt PIO (in the DRQ phase), then DMA */
+    ide_transfer_cancel(s);
+    ide_cancel_dma_sync(s);
+
+    /* Reset any PIO commands, reset signature, etc */
+    ide_reset(s);
+
+    /* RESET: ATA8-ACS3 7.10.4 "Normal Outputs";
+     * ATA8-ACS3 Table 184 "Device Signatures for Normal Output" */
+    s->status = 0x00;
+
+    /* Do not overwrite status register */
+    return false;
+}
+
 static bool cmd_data_set_management(IDEState *s, uint8_t cmd)
 {
     switch (s->feature) {
@@ -1611,15 +1627,6 @@  static bool cmd_exec_dev_diagnostic(IDEState *s, uint8_t cmd)
     return false;
 }
 
-static bool cmd_device_reset(IDEState *s, uint8_t cmd)
-{
-    ide_set_signature(s);
-    s->status = 0x00; /* NOTE: READY is _not_ set */
-    s->error = 0x01;
-
-    return false;
-}
-
 static bool cmd_packet(IDEState *s, uint8_t cmd)
 {
     /* overlapping commands not supported */