diff options
| author | Arnd Bergmann <arnd@arndb.de> | 2017-10-11 17:20:13 +0200 |
|---|---|---|
| committer | Dave Airlie <airlied@redhat.com> | 2017-10-13 08:34:50 +1000 |
| commit | 25e1a79874eb3821d93310c908cc0a81b47af060 (patch) | |
| tree | 3081b7fc5f68805e9ff376ad8cb6976c8fda1216 /drivers/gpu/drm/drm_ioctl.c | |
| parent | 67680d3c046450b3901aa4e5a9cf2f8fbd7ed9a2 (diff) | |
| download | linux-25e1a79874eb3821d93310c908cc0a81b47af060.tar.gz | |
drm: vblank: remove drm_timestamp_monotonic parameter
There is a risk of overflowing vblank timestamps in 2038 or 2106 if
someone sets the drm_timestamp_monotonic module parameter to zero.
I found no indication of anyone ever setting the parameter, or
complaining about the default being wrong, after it was introduced
as a way to handle backwards-compatibility with linux prior to
c61eef726a78 ("drm: add support for monotonic vblank timestamps"),
so it's probably safer to just remove the parameter completely
and only allowing the default behavior.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Daniel Stone <daniels@collabora.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Diffstat (limited to 'drivers/gpu/drm/drm_ioctl.c')
| -rw-r--r-- | drivers/gpu/drm/drm_ioctl.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/gpu/drm/drm_ioctl.c b/drivers/gpu/drm/drm_ioctl.c index a9ae6dd2d593..a78f03155466 100644 --- a/drivers/gpu/drm/drm_ioctl.c +++ b/drivers/gpu/drm/drm_ioctl.c @@ -235,7 +235,7 @@ static int drm_getcap(struct drm_device *dev, void *data, struct drm_file *file_ /* Only some caps make sense with UMS/render-only drivers. */ switch (req->capability) { case DRM_CAP_TIMESTAMP_MONOTONIC: - req->value = drm_timestamp_monotonic; + req->value = 1; return 0; case DRM_CAP_PRIME: req->value |= dev->driver->prime_fd_to_handle ? DRM_PRIME_CAP_IMPORT : 0; |