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List:       linux-pci
Subject:    Re: [PATCH v2 4/7] PCI: Add device even if driver attach failed
From:       Greg Kroah-Hartman <gregkh () linuxfoundation ! org>
Date:       2020-06-30 8:02:20
Message-ID: 20200630080220.GC619174 () kroah ! com
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On Mon, Jun 29, 2020 at 09:49:40PM -0700, Rajat Jain wrote:
> device_attach() returning failure indicates a driver error while trying to
> probe the device. In such a scenario, the PCI device should still be added
> in the system and be visible to the user.
> 
> This patch partially reverts:
> commit ab1a187bba5c ("PCI: Check device_attach() return value always")
> 
> Signed-off-by: Rajat Jain <rajatja@google.com>
> Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
> ---
> v2: Cosmetic change in commit log.
>     Add Greg's "reviewed-by"
> 
>  drivers/pci/bus.c | 6 +-----
>  1 file changed, 1 insertion(+), 5 deletions(-)
> 
> diff --git a/drivers/pci/bus.c b/drivers/pci/bus.c
> index 8e40b3e6da77d..3cef835b375fd 100644
> --- a/drivers/pci/bus.c
> +++ b/drivers/pci/bus.c
> @@ -322,12 +322,8 @@ void pci_bus_add_device(struct pci_dev *dev)
>  
>  	dev->match_driver = true;
>  	retval = device_attach(&dev->dev);
> -	if (retval < 0 && retval != -EPROBE_DEFER) {
> +	if (retval < 0 && retval != -EPROBE_DEFER)
>  		pci_warn(dev, "device attach failed (%d)\n", retval);
> -		pci_proc_detach_device(dev);
> -		pci_remove_sysfs_dev_files(dev);
> -		return;
> -	}
>  
>  	pci_dev_assign_added(dev, true);
>  }

This should go first in the series, and cc: stable and get merged now.
No need to tie it to this series at all.

Or just an independant patch, it doesn't have much to do with this
series, it's a bugfix.

thanks,

greg k-h
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