[Qemu-devel] [PATCH] arch_init: Simplify code for load_xbzrle()

[Chen Gang <gang.chen.5i5j@gmail.com>]

For xbzrle_decode_buffer(), when decoding contents will exceed writing
buffer, it will return -1, so need not check the return value whether
large than writing buffer.

And when failure occurs within load_xbzrle(), it always return -1
without any resources which need release.

So can remove the related checking statements, and also can remove 'rc'
and 'ret' local variables,


Signed-off-by: Chen Gang <gang.chen.5i5j@gmail.com>
---
 arch_init.c | 14 ++++----------
 1 file changed, 4 insertions(+), 10 deletions(-)

diff --git a/arch_init.c b/arch_init.c
index 60c975d..98ee5b6 100644
--- a/arch_init.c
+++ b/arch_init.c
@@ -908,7 +908,6 @@ static uint64_t ram_save_pending(QEMUFile *f, void *opaque, uint64_t max_size)
 
 static int load_xbzrle(QEMUFile *f, ram_addr_t addr, void *host)
 {
-    int ret, rc = 0;
     unsigned int xh_len;
     int xh_flags;
 
@@ -933,18 +932,13 @@ static int load_xbzrle(QEMUFile *f, ram_addr_t addr, void *host)
     qemu_get_buffer(f, xbzrle_decoded_buf, xh_len);
 
     /* decode RLE */
-    ret = xbzrle_decode_buffer(xbzrle_decoded_buf, xh_len, host,
-                               TARGET_PAGE_SIZE);
-    if (ret == -1) {
+    if (xbzrle_decode_buffer(xbzrle_decoded_buf, xh_len, host,
+                             TARGET_PAGE_SIZE) == -1) {
         fprintf(stderr, "Failed to load XBZRLE page - decode error!\n");
-        rc = -1;
-    } else  if (ret > TARGET_PAGE_SIZE) {
-        fprintf(stderr, "Failed to load XBZRLE page - size %d exceeds %d!\n",
-                ret, TARGET_PAGE_SIZE);
-        abort();
+        return -1;
     }
 
-    return rc;
+    return 0;
 }
 
 static inline void *host_from_stream_offset(QEMUFile *f,
-- 
1.7.11.7