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Re: [Qemu-devel] [Qemu-trivial] [PATCH] PCI Trivial: remove superfluous


From: Marcel Apfelbaum
Subject: Re: [Qemu-devel] [Qemu-trivial] [PATCH] PCI Trivial: remove superfluous code
Date: Tue, 24 Nov 2015 20:30:47 +0200
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.1.0

On 11/23/2015 03:19 PM, Cao jin wrote:
remove superfluous code in do_pci_register_device(). See its caller:
pci_qdev_realize()

Signed-off-by: Cao jin <address@hidden>
---
  hw/pci/pci.c | 1 -
  1 file changed, 1 deletion(-)

diff --git a/hw/pci/pci.c b/hw/pci/pci.c
index 168b9cc..4d16da0 100644
--- a/hw/pci/pci.c
+++ b/hw/pci/pci.c
@@ -878,7 +878,6 @@ static PCIDevice *do_pci_register_device(PCIDevice 
*pci_dev, PCIBus *bus,
         return NULL;
      }

-    pci_dev->devfn = devfn;

Hi, can you please explain why this line is not needed?
As far as I see if do_pci_register_device is called with devfn -1 (auto assign),
the devfn will be computed by this function and then passed to pci_dev.

Am I missing anything?

Thanks,
Marcel


      dma_as = pci_device_iommu_address_space(pci_dev);

      memory_region_init_alias(&pci_dev->bus_master_enable_region,





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