On Mon, 2019-07-22 at 18:40 +0100, Emil Velikov wrote:
> From: Emil Velikov <emil.velikov@xxxxxxxxxxxxx>
>
> Realistically no drivers, but vmwgfx care about the DRM_AUTH flag
> here.
>
> Follow-up work in this driver will properly isolate primary clients
> from
> different master realms, thus we'll no longer need to parse _any_
> ioctl
> flags.
>
> Until that work lands, add a local workaround.
>
> Cc: VMware Graphics <linux-graphics-maintainer@xxxxxxxxxx>
> Cc: Thomas Hellstrom <thellstrom@xxxxxxxxxx>
> Signed-off-by: Emil Velikov <emil.velikov@xxxxxxxxxxxxx>
> ---
> I'd like to merge this through the drm-misc tree. Ack and rb are
> appreciated.
>
> Thanks
> Emil
> ---
> drivers/gpu/drm/vmwgfx/vmwgfx_drv.c | 9 +++++++++
> 1 file changed, 9 insertions(+)
>
> diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c
> b/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c
> index 275d90fe2a25..32c18bb482a6 100644
> --- a/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c
> +++ b/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c
> @@ -1131,6 +1131,15 @@ static long vmw_generic_ioctl(struct file
> *filp, unsigned int cmd,
> } else if (!drm_ioctl_flags(nr, &flags))
> return -EINVAL;
>
> + /*
> + * Little workaround until the vmwgfx patches providing
> isolation of
> + * primary clients from different master realms lands.
> + * With that work, we'll no longer need to parse _any_ ioctl
> flags.
> + */
> + if (nr == 0x2d /* DRM_IOCTL_PRIME_HANDLE_TO_FD */ ||
> + nr == 0x2e /* DRM_IOCTL_PRIME_FD_TO_HANDLE */)
> + flags != DRM_AUTH;
Do you mean bitwise OR assignment? In current form this is no-op.
> +
> vmaster = vmw_master_check(dev, file_priv, flags);
> if (IS_ERR(vmaster)) {
> ret = PTR_ERR(vmaster);
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