linux-kernel - Re: [PATCH] vfio: Extended capability fixes

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Date:	Tue, 2 Nov 2010 21:11:08 +0200
From:	"Michael S. Tsirkin" <mst@...hat.com>
To:	Alex Williamson <alex.williamson@...hat.com>
Cc:	pugs@...co.com, linux-kernel@...r.kernel.org,
	linux-pci@...r.kernel.org, kvm@...r.kernel.org
Subject: Re: [PATCH] vfio: Extended capability fixes

On Mon, Nov 01, 2010 at 11:08:35PM -0600, Alex Williamson wrote:
> - Virtual channel position gets truncated as a u8
>  - Print the ecap that's unknown, not the last cap we saw
>  - Print actual config offset, which provides enough info to make
>    some sense of the error.
> 
> Signed-off-by: Alex Williamson <alex.williamson@...hat.com>
> ---
> 
>  drivers/vfio/vfio_pci_config.c |    8 ++++----
>  1 files changed, 4 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/vfio/vfio_pci_config.c b/drivers/vfio/vfio_pci_config.c
> index 8af995d..8304316 100644
> --- a/drivers/vfio/vfio_pci_config.c
> +++ b/drivers/vfio/vfio_pci_config.c
> @@ -410,7 +410,7 @@ static int vfio_msi_cap_len(struct vfio_dev *vdev, u8 pos)
>   * Determine extended capability length for VC (2 & 9) and
>   * MFVC capabilities
>   */
> -static int vfio_vc_cap_len(struct vfio_dev *vdev, u8 pos)
> +static int vfio_vc_cap_len(struct vfio_dev *vdev, u16 pos)
>  {
>  	struct pci_dev *pdev = vdev->pdev;
>  	u32 dw;
> @@ -580,7 +580,7 @@ int vfio_build_config_map(struct vfio_dev *vdev)
>  				printk(KERN_WARNING
>  					"%s: pci config conflict at %x, "
>  					"caps %x %x\n",
> -					__func__, i, map[pos+i], cap);
> +					__func__, pos+i, map[pos+i], cap);
>  			map[pos+i] = cap;
>  		}
>  		ret = pci_read_config_byte(pdev, pos + PCI_CAP_LIST_NEXT, &pos);
> @@ -683,7 +683,7 @@ int vfio_build_config_map(struct vfio_dev *vdev)
>  		if (len == 0 || len == 0xFF) {
>  			printk(KERN_WARNING
>  				"%s: unknown length for pci ext cap %x\n",
> -				__func__, cap);
> +				__func__, ecap);
>  			len = PCI_CAP_SIZEOF;
>  		}
>  		for (i = 0; i < len; i++) {
> @@ -691,7 +691,7 @@ int vfio_build_config_map(struct vfio_dev *vdev)
>  				printk(KERN_WARNING
>  					"%s: pci config conflict at %x, "
>  					"caps %x %x\n",
> -					__func__, i, map[epos+i], ecap);
> +					__func__, epos+i, map[epos+i], ecap);
>  			map[epos+i] = ecap;

Not related to this patch, but I am surprised checkpatch does not
complain about lack of spaces around + here and elsewhere.
Or does it?

>  		}
>  
> 
> --
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