[PATCH] hw/ide: Remove unuseful IDE_DMA__COUNT definition

["Philippe Mathieu-Daudé" <philmd@linaro.org>]

First, IDE_DMA__COUNT represents the number of enumerated
values, but is incorrectly listed as part of the enum.

Second, IDE_DMA_CMD_str() is internal to core.c and only
takes sane enums from ide_dma_cmd. So no need to check the
'enval' argument is within the enum range. Only checks
IDE_DMA_CMD_lookup[] entry is not NULL.

Both combined, IDE_DMA__COUNT can go.

Reduce IDE_DMA_CMD_lookup[] scope which is only used locally.

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
---
 hw/ide/core.c             | 10 +++++-----
 include/hw/ide/internal.h |  3 ---
 2 files changed, 5 insertions(+), 8 deletions(-)

diff --git a/hw/ide/core.c b/hw/ide/core.c
index 5d1039378f..8bf61e7267 100644
--- a/hw/ide/core.c
+++ b/hw/ide/core.c
@@ -63,19 +63,19 @@ static const int smart_attributes[][12] = {
     { 190,  0x03, 0x00, 0x45, 0x45, 0x1f, 0x00, 0x1f, 0x1f, 0x00, 0x00, 0x32},
 };
 
-const char *IDE_DMA_CMD_lookup[IDE_DMA__COUNT] = {
+static const char *IDE_DMA_CMD_lookup[] = {
     [IDE_DMA_READ] = "DMA READ",
     [IDE_DMA_WRITE] = "DMA WRITE",
     [IDE_DMA_TRIM] = "DMA TRIM",
-    [IDE_DMA_ATAPI] = "DMA ATAPI"
+    [IDE_DMA_ATAPI] = "DMA ATAPI",
 };
 
 static const char *IDE_DMA_CMD_str(enum ide_dma_cmd enval)
 {
-    if ((unsigned)enval < IDE_DMA__COUNT) {
-        return IDE_DMA_CMD_lookup[enval];
+    if (!IDE_DMA_CMD_lookup[enval]) {
+        return "DMA UNKNOWN CMD";
     }
-    return "DMA UNKNOWN CMD";
+    return IDE_DMA_CMD_lookup[enval];
 }
 
 static void ide_dummy_transfer_stop(IDEState *s);
diff --git a/include/hw/ide/internal.h b/include/hw/ide/internal.h
index fc0aa81a88..e864fe8caf 100644
--- a/include/hw/ide/internal.h
+++ b/include/hw/ide/internal.h
@@ -352,11 +352,8 @@ enum ide_dma_cmd {
     IDE_DMA_WRITE,
     IDE_DMA_TRIM,
     IDE_DMA_ATAPI,
-    IDE_DMA__COUNT
 };
 
-extern const char *IDE_DMA_CMD_lookup[IDE_DMA__COUNT];
-
 #define ide_cmd_is_read(s) \
         ((s)->dma_cmd == IDE_DMA_READ)
 
-- 
2.38.1