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Re: [Qemu-devel] [PATCH v7 2/2] dump: Turn some functions to void to mak


From: zhanghailiang
Subject: Re: [Qemu-devel] [PATCH v7 2/2] dump: Turn some functions to void to make code cleaner
Date: Thu, 9 Oct 2014 10:12:49 +0800
User-agent: Mozilla/5.0 (Windows NT 6.1; rv:31.0) Gecko/20100101 Thunderbird/31.1.1

On 2014/10/8 22:57, Eric Blake wrote:
On 09/30/2014 03:20 AM, zhanghailiang wrote:
Functions shouldn't return an error code and an Error object at the same time.
Turn all these functions that returning Error object to void.
We also judge if a function success or fail by reference to the local_err.

Signed-off-by: zhanghailiang <address@hidden>
---
  dump.c | 313 ++++++++++++++++++++++++++++++-----------------------------------
  1 file changed, 143 insertions(+), 170 deletions(-)



@@ -348,49 +326,45 @@ static int write_elf_section(DumpState *s, int type, 
Error **errp)
      ret = fd_write_vmcore(&shdr, shdr_size, s);
      if (ret < 0) {
          dump_error(s, "dump: failed to write section header table", errp);
-        return -1;
+        return;
      }
-
-    return 0;
  }

The 'return' here is not in a loop, and therefore not necessary.


-static int write_data(DumpState *s, void *buf, int length, Error **errp)
+static void write_data(DumpState *s, void *buf, int length, Error **errp)
  {
      int ret;

      ret = fd_write_vmcore(buf, length, s);
      if (ret < 0) {
          dump_error(s, "dump: failed to save memory", errp);
-        return -1;
+        return;
      }
-
-    return 0;
  }

and again.


  /* write the memroy to vmcore. 1 page per I/O. */

Please s/memroy/memory/ while touching this :)


@@ -1706,7 +1680,6 @@ void qmp_dump_guest_memory(bool paging, const char *file, 
bool has_begin,
      } else {
          create_vmcore(s, errp);
      }
-
      g_free(s);
  }

Looks a bit like a spurious line deletion in this hunk.


I will fix all the issues and send V8 with 'Reviewed-by' tag, Thanks very much;)

Findings are minor, so I'm fine if you add:
Reviewed-by: Eric Blake <address@hidden>






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