Re: [PATCH 6/8] Pass activeDevs and inactiveDevs to virPCIDeviceUnbindFromStub and virPCIDeviceBindToStub

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On Fri, 2015-10-30 at 05:00 +0530, Shivaprasad G Bhat wrote:
> The inactiveDevs need to be selectively altered for more than one
> device in case of vfio devices. So, pass the whole list.
> 
> Signed-off-by: Shivaprasad G Bhat <sbhat@xxxxxxxxxxxxxxxxxx>
> ---
>  src/util/virpci.c |   38 +++++++++++++++++++++-----------------
>  1 file changed, 21 insertions(+), 17 deletions(-)
> 
> diff --git a/src/util/virpci.c b/src/util/virpci.c
> index 2709ddd..6c24a81 100644
> --- a/src/util/virpci.c
> +++ b/src/util/virpci.c
> @@ -1129,7 +1129,9 @@ static int virPCIDeviceReprobeHostDriver(virPCIDevicePtr dev, char *driver, char
>  }
>  
>  static int
> -virPCIDeviceUnbindFromStub(virPCIDevicePtr dev)
> +virPCIDeviceUnbindFromStub(virPCIDevicePtr dev,
> +                           virPCIDeviceListPtr activeDevs ATTRIBUTE_UNUSED,
> +                           virPCIDeviceListPtr inactiveDevs)
>  {
>      int result = -1;
>      char *drvdir = NULL;
> @@ -1177,6 +1179,9 @@ virPCIDeviceUnbindFromStub(virPCIDevicePtr dev)
>   reprobe:
>      if (virPCIDeviceReprobeHostDriver(dev, driver, drvdir) < 0)
>          goto cleanup;
> +    /* Steal the dev from list inactiveDevs */
> +    if (inactiveDevs)
> +        virPCIDeviceListDel(inactiveDevs, dev);
>  
>      result = 0;
>  
> @@ -1195,7 +1200,9 @@ virPCIDeviceUnbindFromStub(virPCIDevicePtr dev)
>  
>  static int
>  virPCIDeviceBindToStub(virPCIDevicePtr dev,
> -                       const char *stubDriverName)
> +                       const char *stubDriverName,
> +                       virPCIDeviceListPtr activeDevs,
> +                       virPCIDeviceListPtr inactiveDevs)
>  {
>      int result = -1;
>      bool reprobe = false;
> @@ -1317,6 +1324,14 @@ virPCIDeviceBindToStub(virPCIDevicePtr dev,
>          goto cleanup;
>      }
>  
> +    /* Add *a copy of* the dev into list inactiveDevs, if
> +     * it's not already there.
> +                     */

Just close the comment in the previous line.

> +    if (inactiveDevs && !virPCIDeviceListFind(inactiveDevs, dev) &&
> +            virPCIDeviceListAddCopy(inactiveDevs, dev) < 0) {

Really weird alignment here...

> +        result = -1;
> +    }
> +
>   cleanup:
>      VIR_FREE(stubDriverPath);
>      VIR_FREE(driverLink);
> @@ -1324,7 +1339,7 @@ virPCIDeviceBindToStub(virPCIDevicePtr dev,
>  
>      if (result < 0) {
>          VIR_FREE(newDriverName);
> -        virPCIDeviceUnbindFromStub(dev);
> +        virPCIDeviceUnbindFromStub(dev, activeDevs, NULL);

Why pass NULL instead of inactiveDevs here?

>      } else {
>          VIR_FREE(dev->stubDriver);
>          dev->stubDriver = newDriverName;
> @@ -1371,16 +1386,9 @@ virPCIDeviceDetach(virPCIDevicePtr dev,
>          return -1;
>      }
>  
> -    if (virPCIDeviceBindToStub(dev, dev->stubDriver) < 0)
> -        return -1;
> -
> -    /* Add *a copy of* the dev into list inactiveDevs, if
> -     * it's not already there.
> -     */
> -    if (inactiveDevs && !virPCIDeviceListFind(inactiveDevs, dev) &&
> -        virPCIDeviceListAddCopy(inactiveDevs, dev) < 0) {
> +    if (virPCIDeviceBindToStub(dev, dev->stubDriver,
> +                               activeDevs, inactiveDevs) < 0)
>          return -1;
> -    }
>  
>      return 0;
>  }
> @@ -1396,13 +1404,9 @@ virPCIDeviceReattach(virPCIDevicePtr dev,
>          return -1;
>      }
>  
> -    if (virPCIDeviceUnbindFromStub(dev) < 0)
> +    if (virPCIDeviceUnbindFromStub(dev, activeDevs, inactiveDevs) < 0)
>          return -1;
>  
> -    /* Steal the dev from list inactiveDevs */
> -    if (inactiveDevs)
> -        virPCIDeviceListDel(inactiveDevs, dev);
> -
>      return 0;
>  }

Cheers.

-- 
Andrea Bolognani
Software Engineer - Virtualization Team

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