[Qemu-devel] [PATCH v2] pci: Set err to errp directly rather than through error_porpagate()

[Qemu-devel] [PATCH v2] pci: Set err to errp directly rather than through error_porpagate()

[Mao Zhongyi]

ioh3420_interrupts_init() and its callers rp_realize() fill error
message to local_err, then propagate it to errp by error_porpagate(),
which's not necessary. So eliminate it and pass errp directly instead
of local_err. Of course, error_propagate() also has been removed.

Signed-off-by: Mao Zhongyi <maozy.fnst@cn.fujitsu.com>
---
v2:
* Drop the part of wrong handling that ignored the fact that if 
  pci_qdev_realize()'s caller pass errp = NULL.

 hw/pci-bridge/ioh3420.c        | 4 +---
 hw/pci-bridge/pcie_root_port.c | 7 ++-----
 2 files changed, 3 insertions(+), 8 deletions(-)

diff --git a/hw/pci-bridge/ioh3420.c b/hw/pci-bridge/ioh3420.c
index da4e5bd..5f56a2f 100644
--- a/hw/pci-bridge/ioh3420.c
+++ b/hw/pci-bridge/ioh3420.c
@@ -64,15 +64,13 @@ static uint8_t ioh3420_aer_vector(const PCIDevice *d)
 static int ioh3420_interrupts_init(PCIDevice *d, Error **errp)
 {
     int rc;
-    Error *local_err = NULL;
 
     rc = msi_init(d, IOH_EP_MSI_OFFSET, IOH_EP_MSI_NR_VECTOR,
                   IOH_EP_MSI_SUPPORTED_FLAGS & PCI_MSI_FLAGS_64BIT,
                   IOH_EP_MSI_SUPPORTED_FLAGS & PCI_MSI_FLAGS_MASKBIT,
-                  &local_err);
+                  errp);
     if (rc < 0) {
         assert(rc == -ENOTSUP);
-        error_propagate(errp, local_err);
     }
 
     return rc;
diff --git a/hw/pci-bridge/pcie_root_port.c b/hw/pci-bridge/pcie_root_port.c
index cf36318..9022996 100644
--- a/hw/pci-bridge/pcie_root_port.c
+++ b/hw/pci-bridge/pcie_root_port.c
@@ -59,7 +59,6 @@ static void rp_realize(PCIDevice *d, Error **errp)
     PCIDeviceClass *dc = PCI_DEVICE_GET_CLASS(d);
     PCIERootPortClass *rpc = PCIE_ROOT_PORT_GET_CLASS(d);
     int rc;
-    Error *local_err = NULL;
 
     pci_config_set_interrupt_pin(d->config, 1);
     pci_bridge_initfn(d, TYPE_PCIE_BUS);
@@ -72,9 +71,8 @@ static void rp_realize(PCIDevice *d, Error **errp)
     }
 
     if (rpc->interrupts_init) {
-        rc = rpc->interrupts_init(d, &local_err);
+        rc = rpc->interrupts_init(d, errp);
         if (rc < 0) {
-            error_propagate(errp, local_err);
             goto err_bridge;
         }
     }
@@ -98,9 +96,8 @@ static void rp_realize(PCIDevice *d, Error **errp)
     }
 
     rc = pcie_aer_init(d, PCI_ERR_VER, rpc->aer_offset,
-                       PCI_ERR_SIZEOF, &local_err);
+                       PCI_ERR_SIZEOF, errp);
     if (rc < 0) {
-        error_propagate(errp, local_err);
         goto err;
     }
     pcie_aer_root_init(d);
-- 
2.9.3

Re: [Qemu-devel] [PATCH v2] pci: Set err to errp directly rather than through error_porpagate()

[Eric Blake]

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On 05/26/2017 06:58 AM, Mao Zhongyi wrote:

In the subject: s/porpagate/propagate/

> ioh3420_interrupts_init() and its callers rp_realize() fill error
> message to local_err, then propagate it to errp by error_porpagate(),

and again

> which's not necessary. So eliminate it and pass errp directly instead

s/which's/which is/ (English does not have the abbreviation which's)

> of local_err. Of course, error_propagate() also has been removed.
> 
> Signed-off-by: Mao Zhongyi <maozy.fnst@cn.fujitsu.com>
> ---
> v2:
> * Drop the part of wrong handling that ignored the fact that if 
>   pci_qdev_realize()'s caller pass errp = NULL.
> 

The code portion is fine, so with the commit message fixed (which a
maintainer might do without needing you to send a v3),
Reviewed-by: Eric Blake <eblake@redhat.com>

-- 
Eric Blake, Principal Software Engineer
Red Hat, Inc.           +1-919-301-3266
Virtualization:  qemu.org | libvirt.org


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Re: [Qemu-devel] [PATCH v2] pci: Set err to errp directly rather than through error_porpagate()

[Mao Zhongyi]

On 05/26/2017 09:33 PM, Eric Blake wrote:
> On 05/26/2017 06:58 AM, Mao Zhongyi wrote:
>
> In the subject: s/porpagate/propagate/
>
>> ioh3420_interrupts_init() and its callers rp_realize() fill error
>> message to local_err, then propagate it to errp by error_porpagate(),
>
> and again

OK, I see.
Thanks

>
>> which's not necessary. So eliminate it and pass errp directly instead
>
> s/which's/which is/ (English does not have the abbreviation which's)

Thanks for your kindly remind. I think that this problem will not
happen again. :)

>
>> of local_err. Of course, error_propagate() also has been removed.
>>
>> Signed-off-by: Mao Zhongyi <maozy.fnst@cn.fujitsu.com>
>> ---
>> v2:
>> * Drop the part of wrong handling that ignored the fact that if
>>   pci_qdev_realize()'s caller pass errp = NULL.
>>
>
> The code portion is fine, so with the commit message fixed (which a
> maintainer might do without needing you to send a v3),
> Reviewed-by: Eric Blake <eblake@redhat.com>
>

I am very glad to hear that.
I will fix it again in the v3. After all, it's not good to bother
others.

Thanks a lot.
Mao

Re: [Qemu-devel] [PATCH v2] pci: Set err to errp directly rather than through error_porpagate()

[Marcel Apfelbaum]

On 26/05/2017 14:58, Mao Zhongyi wrote:
> ioh3420_interrupts_init() and its callers rp_realize() fill error
> message to local_err, then propagate it to errp by error_porpagate(),
> which's not necessary. So eliminate it and pass errp directly instead
> of local_err. Of course, error_propagate() also has been removed.
>
> Signed-off-by: Mao Zhongyi <maozy.fnst@cn.fujitsu.com>
> ---
> v2:
> * Drop the part of wrong handling that ignored the fact that if
>    pci_qdev_realize()'s caller pass errp = NULL.
>
>   hw/pci-bridge/ioh3420.c        | 4 +---
>   hw/pci-bridge/pcie_root_port.c | 7 ++-----
>   2 files changed, 3 insertions(+), 8 deletions(-)
>
> diff --git a/hw/pci-bridge/ioh3420.c b/hw/pci-bridge/ioh3420.c
> index da4e5bd..5f56a2f 100644
> --- a/hw/pci-bridge/ioh3420.c
> +++ b/hw/pci-bridge/ioh3420.c
> @@ -64,15 +64,13 @@ static uint8_t ioh3420_aer_vector(const PCIDevice *d)
>   static int ioh3420_interrupts_init(PCIDevice *d, Error **errp)
>   {
>       int rc;
> -    Error *local_err = NULL;
>   
>       rc = msi_init(d, IOH_EP_MSI_OFFSET, IOH_EP_MSI_NR_VECTOR,
>                     IOH_EP_MSI_SUPPORTED_FLAGS & PCI_MSI_FLAGS_64BIT,
>                     IOH_EP_MSI_SUPPORTED_FLAGS & PCI_MSI_FLAGS_MASKBIT,
> -                  &local_err);
> +                  errp);
>       if (rc < 0) {
>           assert(rc == -ENOTSUP);
> -        error_propagate(errp, local_err);
>       }
>   
>       return rc;
> diff --git a/hw/pci-bridge/pcie_root_port.c b/hw/pci-bridge/pcie_root_port.c
> index cf36318..9022996 100644
> --- a/hw/pci-bridge/pcie_root_port.c
> +++ b/hw/pci-bridge/pcie_root_port.c
> @@ -59,7 +59,6 @@ static void rp_realize(PCIDevice *d, Error **errp)
>       PCIDeviceClass *dc = PCI_DEVICE_GET_CLASS(d);
>       PCIERootPortClass *rpc = PCIE_ROOT_PORT_GET_CLASS(d);
>       int rc;
> -    Error *local_err = NULL;
>   
>       pci_config_set_interrupt_pin(d->config, 1);
>       pci_bridge_initfn(d, TYPE_PCIE_BUS);
> @@ -72,9 +71,8 @@ static void rp_realize(PCIDevice *d, Error **errp)
>       }
>   
>       if (rpc->interrupts_init) {
> -        rc = rpc->interrupts_init(d, &local_err);
> +        rc = rpc->interrupts_init(d, errp);
>           if (rc < 0) {
> -            error_propagate(errp, local_err);
>               goto err_bridge;
>           }
>       }
> @@ -98,9 +96,8 @@ static void rp_realize(PCIDevice *d, Error **errp)
>       }
>   
>       rc = pcie_aer_init(d, PCI_ERR_VER, rpc->aer_offset,
> -                       PCI_ERR_SIZEOF, &local_err);
> +                       PCI_ERR_SIZEOF, errp);
>       if (rc < 0) {
> -        error_propagate(errp, local_err);
>           goto err;
>       }
>       pcie_aer_root_init(d);

Reviewed-by: Marcel Apfelbaum<marcel@redhat.com>

Thanks,
Marcel