ide: simplify reset callbacks

Drop the unused return value and make the callback optional.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: John Snow <jsnow@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>

5 files changed, 6 insertions, 13 deletions

diff --git a/hw/ide/ahci.c b/hw/ide/ahci.c
index 604152a823..273712faaa 100644
--- a/hw/ide/ahci.c
+++ b/hw/ide/ahci.c
@@ -1147,11 +1147,6 @@ static void ahci_dma_restart_cb(void *opaque, int running, RunState state)
 {
 }
 
-static int ahci_dma_reset(IDEDMA *dma)
-{
-    return 0;
-}
-
 static const IDEDMAOps ahci_dma_ops = {
     .start_dma = ahci_start_dma,
     .start_transfer = ahci_start_transfer,
@@ -1162,7 +1157,6 @@ static const IDEDMAOps ahci_dma_ops = {
     .set_inactive = ahci_dma_set_inactive,
     .async_cmd_done = ahci_async_cmd_done,
     .restart_cb = ahci_dma_restart_cb,
-    .reset = ahci_dma_reset,
 };
 
 void ahci_init(AHCIState *s, DeviceState *qdev, AddressSpace *as, int ports)
diff --git a/hw/ide/core.c b/hw/ide/core.c
index 79985f9f49..4183a3abe2 100644
--- a/hw/ide/core.c
+++ b/hw/ide/core.c
@@ -2088,7 +2088,9 @@ void ide_bus_reset(IDEBus *bus)
     }
 
     /* reset dma provider too */
-    bus->dma->ops->reset(bus->dma);
+    if (bus->dma->ops->reset) {
+        bus->dma->ops->reset(bus->dma);
+    }
 }
 
 static bool ide_cd_is_tray_open(void *opaque)
@@ -2226,7 +2228,6 @@ static const IDEDMAOps ide_dma_nop_ops = {
     .add_status     = ide_nop_int,
     .set_inactive   = ide_nop,
     .restart_cb     = ide_nop_restart,
-    .reset          = ide_nop,
 };
 
 static IDEDMA ide_dma_nop = {
diff --git a/hw/ide/internal.h b/hw/ide/internal.h
index 0567a522f5..6cca46f506 100644
--- a/hw/ide/internal.h
+++ b/hw/ide/internal.h
@@ -320,6 +320,7 @@ typedef enum { IDE_HD, IDE_CD, IDE_CFATA } IDEDriveKind;
 typedef void EndTransferFunc(IDEState *);
 
 typedef void DMAStartFunc(IDEDMA *, IDEState *, BlockDriverCompletionFunc *);
+typedef void DMAVoidFunc(IDEDMA *);
 typedef int DMAFunc(IDEDMA *);
 typedef int DMAIntFunc(IDEDMA *, int);
 typedef void DMARestartFunc(void *, int, RunState);
@@ -435,7 +436,7 @@ struct IDEDMAOps {
     DMAFunc *set_inactive;
     DMAFunc *async_cmd_done;
     DMARestartFunc *restart_cb;
-    DMAFunc *reset;
+    DMAVoidFunc *reset;
 };
 
 struct IDEDMA {
diff --git a/hw/ide/macio.c b/hw/ide/macio.c
index c14a1ddddb..ca39e3f9b6 100644
--- a/hw/ide/macio.c
+++ b/hw/ide/macio.c
@@ -578,7 +578,6 @@ static const IDEDMAOps dbdma_ops = {
     .add_status     = ide_nop_int,
     .set_inactive   = ide_nop,
     .restart_cb     = ide_nop_restart,
-    .reset          = ide_nop,
 };
 
 static void macio_ide_realizefn(DeviceState *dev, Error **errp)
diff --git a/hw/ide/pci.c b/hw/ide/pci.c
index 6257a21ed2..c24496a992 100644
--- a/hw/ide/pci.c
+++ b/hw/ide/pci.c
@@ -247,7 +247,7 @@ static void bmdma_cancel(BMDMAState *bm)
     }
 }
 
-static int bmdma_reset(IDEDMA *dma)
+static void bmdma_reset(IDEDMA *dma)
 {
     BMDMAState *bm = DO_UPCAST(BMDMAState, dma, dma);
 
@@ -264,8 +264,6 @@ static int bmdma_reset(IDEDMA *dma)
     bm->cur_prd_len = 0;
     bm->sector_num = 0;
     bm->nsector = 0;
-
-    return 0;
 }
 
 static int bmdma_start_transfer(IDEDMA *dma)