Re: [Qemu-devel] [PATCH v7 RESEND 4/8] memory: add parameter errp to memory_region_init_rom_device

[Paolo Bonzini <pbonzini@redhat.com>]

Il 09/09/2014 07:27, Hu Tao ha scritto:
> Add parameter errp to memory_region_init_rom_device and update all call
> sites to pass in &error_abort.
> 
> Reviewed-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com>
> Signed-off-by: Hu Tao <hutao@cn.fujitsu.com>

Better not use error_abort if we can avoid it, and here it's particularly
easy...

Paolo

diff --git a/hw/block/pflash_cfi01.c b/hw/block/pflash_cfi01.c
index f15b4fe..688184e 100644
--- a/hw/block/pflash_cfi01.c
+++ b/hw/block/pflash_cfi01.c
@@ -750,6 +750,7 @@ static void pflash_cfi01_realize(DeviceState *dev, Error **errp)
     int ret;
     uint64_t blocks_per_device, device_len;
     int num_devices;
+    Error *local_err = NULL;
 
     total_len = pfl->sector_len * pfl->nb_blocs;
 
@@ -770,7 +771,12 @@ static void pflash_cfi01_realize(DeviceState *dev, Error **errp)
     memory_region_init_rom_device(
         &pfl->mem, OBJECT(dev),
         pfl->be ? &pflash_cfi01_ops_be : &pflash_cfi01_ops_le, pfl,
-        pfl->name, total_len, &error_abort);
+        pfl->name, total_len, &local_err);
+    if (local_err) {
+        error_propagate(errp, local_err);
+        return NULL;
+    }
+
     vmstate_register_ram(&pfl->mem, DEVICE(pfl));
     pfl->storage = memory_region_get_ram_ptr(&pfl->mem);
     sysbus_init_mmio(SYS_BUS_DEVICE(dev), &pfl->mem);
diff --git a/hw/block/pflash_cfi02.c b/hw/block/pflash_cfi02.c
index 29bb0dc..39b44f3 100644
--- a/hw/block/pflash_cfi02.c
+++ b/hw/block/pflash_cfi02.c
@@ -597,6 +597,7 @@ static void pflash_cfi02_realize(DeviceState *dev, Error **errp)
     pflash_t *pfl = CFI_PFLASH02(dev);
     uint32_t chip_len;
     int ret;
+    Error *local_err = NULL;
 
     chip_len = pfl->sector_len * pfl->nb_blocs;
     /* XXX: to be fixed */
@@ -608,7 +609,12 @@ static void pflash_cfi02_realize(DeviceState *dev, Error **errp)
 
     memory_region_init_rom_device(&pfl->orig_mem, OBJECT(pfl), pfl->be ?
                                   &pflash_cfi02_ops_be : &pflash_cfi02_ops_le,
-                                  pfl, pfl->name, chip_len, &error_abort);
+                                  pfl, pfl->name, chip_len, &local_err);
+    if (local_err) {
+        error_propagate(errp, local_err);
+        return NULL;
+    }
+
     vmstate_register_ram(&pfl->orig_mem, DEVICE(pfl));
     pfl->storage = memory_region_get_ram_ptr(&pfl->orig_mem);
     pfl->chip_len = chip_len;

> ---
>  hw/block/pflash_cfi01.c | 2 +-
>  hw/block/pflash_cfi02.c | 2 +-
>  include/exec/memory.h   | 4 +++-
>  memory.c                | 5 +++--
>  4 files changed, 8 insertions(+), 5 deletions(-)
> 
> diff --git a/hw/block/pflash_cfi01.c b/hw/block/pflash_cfi01.c
> index 593fbc5..4d51bfd 100644
> --- a/hw/block/pflash_cfi01.c
> +++ b/hw/block/pflash_cfi01.c
> @@ -773,7 +773,7 @@ static void pflash_cfi01_realize(DeviceState *dev, Error **errp)
>      memory_region_init_rom_device(
>          &pfl->mem, OBJECT(dev),
>          pfl->be ? &pflash_cfi01_ops_be : &pflash_cfi01_ops_le, pfl,
> -        pfl->name, total_len);
> +        pfl->name, total_len, &error_abort);
>      vmstate_register_ram(&pfl->mem, DEVICE(pfl));
>      pfl->storage = memory_region_get_ram_ptr(&pfl->mem);
>      sysbus_init_mmio(SYS_BUS_DEVICE(dev), &pfl->mem);
> diff --git a/hw/block/pflash_cfi02.c b/hw/block/pflash_cfi02.c
> index e196f4d..29bb0dc 100644
> --- a/hw/block/pflash_cfi02.c
> +++ b/hw/block/pflash_cfi02.c
> @@ -608,7 +608,7 @@ static void pflash_cfi02_realize(DeviceState *dev, Error **errp)
>  
>      memory_region_init_rom_device(&pfl->orig_mem, OBJECT(pfl), pfl->be ?
>                                    &pflash_cfi02_ops_be : &pflash_cfi02_ops_le,
> -                                  pfl, pfl->name, chip_len);
> +                                  pfl, pfl->name, chip_len, &error_abort);
>      vmstate_register_ram(&pfl->orig_mem, DEVICE(pfl));
>      pfl->storage = memory_region_get_ram_ptr(&pfl->orig_mem);
>      pfl->chip_len = chip_len;
> diff --git a/include/exec/memory.h b/include/exec/memory.h
> index dcb35a2..4921d27 100644
> --- a/include/exec/memory.h
> +++ b/include/exec/memory.h
> @@ -388,13 +388,15 @@ void memory_region_init_alias(MemoryRegion *mr,
>   * @ops: callbacks for write access handling.
>   * @name: the name of the region.
>   * @size: size of the region.
> + * @errp: pointer to Error*, to store an error if it happens.
>   */
>  void memory_region_init_rom_device(MemoryRegion *mr,
>                                     struct Object *owner,
>                                     const MemoryRegionOps *ops,
>                                     void *opaque,
>                                     const char *name,
> -                                   uint64_t size);
> +                                   uint64_t size,
> +                                   Error **errp);
>  
>  /**
>   * memory_region_init_reservation: Initialize a memory region that reserves
> diff --git a/memory.c b/memory.c
> index ffe24ff..38c29df 100644
> --- a/memory.c
> +++ b/memory.c
> @@ -1202,7 +1202,8 @@ void memory_region_init_rom_device(MemoryRegion *mr,
>                                     const MemoryRegionOps *ops,
>                                     void *opaque,
>                                     const char *name,
> -                                   uint64_t size)
> +                                   uint64_t size,
> +                                   Error **errp)
>  {
>      memory_region_init(mr, owner, name, size);
>      mr->ops = ops;
> @@ -1210,7 +1211,7 @@ void memory_region_init_rom_device(MemoryRegion *mr,
>      mr->terminates = true;
>      mr->rom_device = true;
>      mr->destructor = memory_region_destructor_rom_device;
> -    mr->ram_addr = qemu_ram_alloc(size, mr, &error_abort);
> +    mr->ram_addr = qemu_ram_alloc(size, mr, errp);
>  }
>  
>  void memory_region_init_iommu(MemoryRegion *mr,
>