Parameter address for read and write callback in MemoryRegionOps is
relative offset with base address of this MemoryRegionOps. It can
be directly used as offset and offset calculation can be removed.

Signed-off-by: Bibo Mao <maobibo@loongson.cn>
---
 hw/intc/loongarch_pch_pic.c | 34 ++++++++++++++++------------------
 1 file changed, 16 insertions(+), 18 deletions(-)

diff --git a/hw/intc/loongarch_pch_pic.c b/hw/intc/loongarch_pch_pic.c
index 7043b8b9f4..93f7ceb6b9 100644
--- a/hw/intc/loongarch_pch_pic.c
+++ b/hw/intc/loongarch_pch_pic.c
@@ -76,9 +76,8 @@ static uint64_t loongarch_pch_pic_low_readw(void *opaque, hwaddr addr,
 {
     LoongArchPICCommonState *s = LOONGARCH_PIC_COMMON(opaque);
     uint64_t val = 0;
-    uint32_t offset = addr & 0xfff;
 
-    switch (offset) {
+    switch (addr) {
     case PCH_PIC_INT_ID:
         val = s->id.data & UINT_MAX;
         break;
@@ -129,13 +128,12 @@ static void loongarch_pch_pic_low_writew(void *opaque, hwaddr addr,
                                          uint64_t value, unsigned size)
 {
     LoongArchPICCommonState *s = LOONGARCH_PIC_COMMON(opaque);
-    uint32_t offset, old_valid, data = (uint32_t)value;
+    uint32_t old_valid, data = (uint32_t)value;
     uint64_t old, int_mask;
-    offset = addr & 0xfff;
 
     trace_loongarch_pch_pic_low_writew(size, addr, data);
 
-    switch (offset) {
+    switch (addr) {
     case PCH_PIC_INT_MASK:
         old = s->int_mask;
         s->int_mask = get_writew_val(old, data, 0);
@@ -203,9 +201,9 @@ static uint64_t loongarch_pch_pic_high_readw(void *opaque, hwaddr addr,
 {
     LoongArchPICCommonState *s = LOONGARCH_PIC_COMMON(opaque);
     uint64_t val = 0;
-    uint32_t offset = addr + PCH_PIC_INT_STATUS;
 
-    switch (offset) {
+    addr += PCH_PIC_INT_STATUS;
+    switch (addr) {
     case PCH_PIC_INT_STATUS:
         val = (uint32_t)(s->intisr & (~s->int_mask));
         break;
@@ -230,12 +228,12 @@ static void loongarch_pch_pic_high_writew(void *opaque, hwaddr addr,
                                      uint64_t value, unsigned size)
 {
     LoongArchPICCommonState *s = LOONGARCH_PIC_COMMON(opaque);
-    uint32_t offset, data = (uint32_t)value;
-    offset = addr + PCH_PIC_INT_STATUS;
+    uint32_t data = (uint32_t)value;
 
+    addr += PCH_PIC_INT_STATUS;
     trace_loongarch_pch_pic_high_writew(size, addr, data);
 
-    switch (offset) {
+    switch (addr) {
     case PCH_PIC_INT_STATUS:
         s->intisr = get_writew_val(s->intisr, data, 0);
         break;
@@ -258,18 +256,18 @@ static uint64_t loongarch_pch_pic_readb(void *opaque, hwaddr addr,
 {
     LoongArchPICCommonState *s = LOONGARCH_PIC_COMMON(opaque);
     uint64_t val = 0;
-    uint32_t offset = (addr & 0xfff) + PCH_PIC_ROUTE_ENTRY;
     int64_t offset_tmp;
 
-    switch (offset) {
+    addr += PCH_PIC_ROUTE_ENTRY;
+    switch (addr) {
     case PCH_PIC_HTMSI_VEC ... PCH_PIC_HTMSI_VEC_END:
-        offset_tmp = offset - PCH_PIC_HTMSI_VEC;
+        offset_tmp = addr - PCH_PIC_HTMSI_VEC;
         if (offset_tmp >= 0 && offset_tmp < 64) {
             val = s->htmsi_vector[offset_tmp];
         }
         break;
     case PCH_PIC_ROUTE_ENTRY ... PCH_PIC_ROUTE_ENTRY_END:
-        offset_tmp = offset - PCH_PIC_ROUTE_ENTRY;
+        offset_tmp = addr - PCH_PIC_ROUTE_ENTRY;
         if (offset_tmp >= 0 && offset_tmp < 64) {
             val = s->route_entry[offset_tmp];
         }
@@ -287,19 +285,19 @@ static void loongarch_pch_pic_writeb(void *opaque, hwaddr addr,
 {
     LoongArchPICCommonState *s = LOONGARCH_PIC_COMMON(opaque);
     int32_t offset_tmp;
-    uint32_t offset = (addr & 0xfff) + PCH_PIC_ROUTE_ENTRY;
 
+    addr += PCH_PIC_ROUTE_ENTRY;
     trace_loongarch_pch_pic_writeb(size, addr, data);
 
-    switch (offset) {
+    switch (addr) {
     case PCH_PIC_HTMSI_VEC ... PCH_PIC_HTMSI_VEC_END:
-        offset_tmp = offset - PCH_PIC_HTMSI_VEC;
+        offset_tmp = addr - PCH_PIC_HTMSI_VEC;
         if (offset_tmp >= 0 && offset_tmp < 64) {
             s->htmsi_vector[offset_tmp] = (uint8_t)(data & 0xff);
         }
         break;
     case PCH_PIC_ROUTE_ENTRY ... PCH_PIC_ROUTE_ENTRY_END:
-        offset_tmp = offset - PCH_PIC_ROUTE_ENTRY;
+        offset_tmp = addr - PCH_PIC_ROUTE_ENTRY;
         if (offset_tmp >= 0 && offset_tmp < 64) {
             s->route_entry[offset_tmp] = (uint8_t)(data & 0xff);
         }
-- 
2.39.3