[PATCH-for-9.1? v2 2/4] hw/sd/sdhci: Reduce variables scope in get_adma_description()

[Philippe Mathieu-Daudé]

The 'adma1' variable is only used in the SDHC_CTRL_ADMA1_32
case, and 'adma2' in SDHC_CTRL_ADMA2_32. Add braces in the
switch case to use local declarations.
Do the same in the SDHC_CTRL_ADMA2_64 case because we'll add
a local variable there in the next commit.

Replace 0xFFFFF000 -> ~0xfff to align with our codebase style.

No functional change intended.

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
---
 hw/sd/sdhci.c | 87 ++++++++++++++++++++++++++++-----------------------
 1 file changed, 48 insertions(+), 39 deletions(-)

diff --git a/hw/sd/sdhci.c b/hw/sd/sdhci.c
index 773f2b284b..0a95f49b93 100644
--- a/hw/sd/sdhci.c
+++ b/hw/sd/sdhci.c
@@ -700,50 +700,59 @@ static void trace_adma_description(const char *type, 
const ADMADescr *dscr)
 
 static void get_adma_description(SDHCIState *s, ADMADescr *dscr)
 {
-    uint32_t adma1 = 0;
-    uint64_t adma2 = 0;
     hwaddr entry_addr = (hwaddr)s->admasysaddr;
     switch (SDHC_DMA_TYPE(s->hostctl1)) {
     case SDHC_CTRL_ADMA2_32:
-        dma_memory_read(s->dma_as, entry_addr, &adma2, sizeof(adma2),
-                        MEMTXATTRS_UNSPECIFIED);
-        adma2 = le64_to_cpu(adma2);
-        /* The spec does not specify endianness of descriptor table.
-         * We currently assume that it is LE.
-         */
-        dscr->addr = (hwaddr)extract64(adma2, 32, 32) & ~0x3ull;
-        dscr->length = (uint16_t)extract64(adma2, 16, 16);
-        dscr->attr = (uint8_t)extract64(adma2, 0, 7);
-        dscr->incr = 8;
-        trace_adma_description("ADMA2_32", dscr);
-        break;
-    case SDHC_CTRL_ADMA1_32:
-        dma_memory_read(s->dma_as, entry_addr, &adma1, sizeof(adma1),
-                        MEMTXATTRS_UNSPECIFIED);
-        adma1 = le32_to_cpu(adma1);
-        dscr->addr = (hwaddr)(adma1 & 0xFFFFF000);
-        dscr->attr = (uint8_t)extract32(adma1, 0, 7);
-        dscr->incr = 4;
-        if ((dscr->attr & SDHC_ADMA_ATTR_ACT_MASK) == SDHC_ADMA_ATTR_SET_LEN) {
-            dscr->length = (uint16_t)extract32(adma1, 12, 16);
-        } else {
-            dscr->length = 4 * KiB;
+        {
+            uint64_t adma2 = 0;
+
+            dma_memory_read(s->dma_as, entry_addr, &adma2, sizeof(adma2),
+                            MEMTXATTRS_UNSPECIFIED);
+            adma2 = le64_to_cpu(adma2);
+            /*
+             * The spec does not specify endianness of descriptor table.
+             * We currently assume that it is LE.
+             */
+            dscr->addr = (hwaddr)extract64(adma2, 32, 32) & ~0x3ull;
+            dscr->length = (uint16_t)extract64(adma2, 16, 16);
+            dscr->attr = (uint8_t)extract64(adma2, 0, 7);
+            dscr->incr = 8;
+            trace_adma_description("ADMA2_32", dscr);
+            break;
+        }
+    case SDHC_CTRL_ADMA1_32:
+        {
+            uint32_t adma1 = 0;
+
+            dma_memory_read(s->dma_as, entry_addr, &adma1, sizeof(adma1),
+                            MEMTXATTRS_UNSPECIFIED);
+            adma1 = le32_to_cpu(adma1);
+            dscr->addr = (hwaddr)(adma1 & ~0xfff);
+            dscr->attr = (uint8_t)extract32(adma1, 0, 7);
+            dscr->incr = 4;
+            if ((dscr->attr & SDHC_ADMA_ATTR_ACT_MASK) == 
SDHC_ADMA_ATTR_SET_LEN) {
+                dscr->length = (uint16_t)extract32(adma1, 12, 16);
+            } else {
+                dscr->length = 4 * KiB;
+            }
+            trace_adma_description("ADMA1_32", dscr);
+            break;
         }
-        trace_adma_description("ADMA1_32", dscr);
-        break;
     case SDHC_CTRL_ADMA2_64:
-        dma_memory_read(s->dma_as, entry_addr, &dscr->attr, 1,
-                        MEMTXATTRS_UNSPECIFIED);
-        dma_memory_read(s->dma_as, entry_addr + 2, &dscr->length, 2,
-                        MEMTXATTRS_UNSPECIFIED);
-        dscr->length = le16_to_cpu(dscr->length);
-        dma_memory_read(s->dma_as, entry_addr + 4, &dscr->addr, 8,
-                        MEMTXATTRS_UNSPECIFIED);
-        dscr->addr = le64_to_cpu(dscr->addr);
-        dscr->attr &= (uint8_t) ~0xC0;
-        dscr->incr = 12;
-        trace_adma_description("ADMA2_64", dscr);
-        break;
+        {
+            dma_memory_read(s->dma_as, entry_addr, &dscr->attr, 1,
+                            MEMTXATTRS_UNSPECIFIED);
+            dma_memory_read(s->dma_as, entry_addr + 2, &dscr->length, 2,
+                            MEMTXATTRS_UNSPECIFIED);
+            dscr->length = le16_to_cpu(dscr->length);
+            dma_memory_read(s->dma_as, entry_addr + 4, &dscr->addr, 8,
+                            MEMTXATTRS_UNSPECIFIED);
+            dscr->addr = le64_to_cpu(dscr->addr);
+            dscr->attr &= (uint8_t) ~0xC0;
+            dscr->incr = 12;
+            trace_adma_description("ADMA2_64", dscr);
+            break;
+        }
     }
 }
 
-- 
2.45.2