diff options
| author | Dave Airlie <airlied@linux.ie> | 2009-09-26 06:39:00 +1000 |
|---|---|---|
| committer | Dave Airlie <airlied@linux.ie> | 2009-09-26 06:39:00 +1000 |
| commit | 8ef8678c8f6131ca5941fa387cd3939c68c4f36d (patch) | |
| tree | b937ca4a7763aec284f311947d323310dbdfbcfa /drivers/gpu/drm/drm_crtc_helper.c | |
| parent | adea4796cfb9b74d340f9e32ba523fb61305d0b7 (diff) | |
drm/kms: protect against fb helper not being created.
If drivers don't init the fb helper on the connector, the cmdline
code won't work, but it shouldn't crash either.
Signed-off-by: Dave Airlie <airlied@redhat.com>
Diffstat (limited to 'drivers/gpu/drm/drm_crtc_helper.c')
| -rw-r--r-- | drivers/gpu/drm/drm_crtc_helper.c | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/drivers/gpu/drm/drm_crtc_helper.c b/drivers/gpu/drm/drm_crtc_helper.c index 82fd6e82450f..1fe4e1d344fd 100644 --- a/drivers/gpu/drm/drm_crtc_helper.c +++ b/drivers/gpu/drm/drm_crtc_helper.c @@ -279,16 +279,25 @@ static struct drm_display_mode *drm_has_preferred_mode(struct drm_connector *con static bool drm_has_cmdline_mode(struct drm_connector *connector) { struct drm_fb_helper_connector *fb_help_conn = connector->fb_helper_private; - struct drm_fb_helper_cmdline_mode *cmdline_mode = &fb_help_conn->cmdline_mode; + struct drm_fb_helper_cmdline_mode *cmdline_mode; + + if (!fb_help_conn) + return false; + + cmdline_mode = &fb_help_conn->cmdline_mode; return cmdline_mode->specified; } static struct drm_display_mode *drm_pick_cmdline_mode(struct drm_connector *connector, int width, int height) { struct drm_fb_helper_connector *fb_help_conn = connector->fb_helper_private; - struct drm_fb_helper_cmdline_mode *cmdline_mode = &fb_help_conn->cmdline_mode; + struct drm_fb_helper_cmdline_mode *cmdline_mode; struct drm_display_mode *mode = NULL; + if (!fb_help_conn) + return mode; + + cmdline_mode = &fb_help_conn->cmdline_mode; if (cmdline_mode->specified == false) return mode; |