memory: Propagate Error* when possible

[PATCH-for-9.0 07/25] memory: Have memory_region_init_rom() handler return a boolean

Posted by Philippe Mathieu-Daudé 1 year ago

Following the example documented since commit e3fe3988d7 ("error:
Document Error API usage rules"), have cpu_exec_realizefn()
return a boolean indicating whether an error is set or not.

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
---
 include/exec/memory.h | 4 +++-
 system/memory.c       | 6 ++++--
 2 files changed, 7 insertions(+), 3 deletions(-)

diff --git a/include/exec/memory.h b/include/exec/memory.h
index 788872e4a4..9d9798a527 100644
--- a/include/exec/memory.h
+++ b/include/exec/memory.h
@@ -1611,8 +1611,10 @@ bool memory_region_init_ram(MemoryRegion *mr,
  *        must be unique within any device
  * @size: size of the region.
  * @errp: pointer to Error*, to store an error if it happens.
+ *
+ * Return: true on success, else false setting @errp with error.
  */
-void memory_region_init_rom(MemoryRegion *mr,
+bool memory_region_init_rom(MemoryRegion *mr,
                             Object *owner,
                             const char *name,
                             uint64_t size,
diff --git a/system/memory.c b/system/memory.c
index 4142eac498..2c764947fa 100644
--- a/system/memory.c
+++ b/system/memory.c
@@ -3620,7 +3620,7 @@ bool memory_region_init_ram(MemoryRegion *mr,
     return true;
 }
 
-void memory_region_init_rom(MemoryRegion *mr,
+bool memory_region_init_rom(MemoryRegion *mr,
                             Object *owner,
                             const char *name,
                             uint64_t size,
@@ -3629,7 +3629,7 @@ void memory_region_init_rom(MemoryRegion *mr,
     DeviceState *owner_dev;
 
     if (!memory_region_init_rom_nomigrate(mr, owner, name, size, errp)) {
-        return;
+        return false;
     }
     /* This will assert if owner is neither NULL nor a DeviceState.
      * We only want the owner here for the purposes of defining a
@@ -3639,6 +3639,8 @@ void memory_region_init_rom(MemoryRegion *mr,
      */
     owner_dev = DEVICE(owner);
     vmstate_register_ram(mr, owner_dev);
+
+    return true;
 }
 
 void memory_region_init_rom_device(MemoryRegion *mr,
-- 
2.41.0

Re: [PATCH-for-9.0 07/25] memory: Have memory_region_init_rom() handler return a boolean

Posted by Gavin Shan 11 months, 4 weeks ago

On 11/21/23 07:32, Philippe Mathieu-Daudé wrote:
> Following the example documented since commit e3fe3988d7 ("error:
> Document Error API usage rules"), have cpu_exec_realizefn()
> return a boolean indicating whether an error is set or not.
> 
> Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
> ---
>   include/exec/memory.h | 4 +++-
>   system/memory.c       | 6 ++++--
>   2 files changed, 7 insertions(+), 3 deletions(-)
>

s/cpu_exec_realizefn()/memory_region_init_rom()

Reviewed-by: Gavin Shan <gshan@redhat.com>

Re: [PATCH-for-9.0 07/25] memory: Have memory_region_init_rom() handler return a boolean

Posted by Manos Pitsidianakis 1 year ago

On Mon, 20 Nov 2023 23:32, Philippe Mathieu-Daudé <philmd@linaro.org> wrote:
>Following the example documented since commit e3fe3988d7 ("error:
>Document Error API usage rules"), have cpu_exec_realizefn()
>return a boolean indicating whether an error is set or not.
>
>Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
>---
> include/exec/memory.h | 4 +++-

Reviewed-by: Manos Pitsidianakis <manos.pitsidianakis@linaro.org>