When we can't allocate a new channel, we can simply return instead of having to handle both cases, and that simplifies a bit the code.
Reviewed-by: Thomas Zimmermann tzimmermann@suse.de Signed-off-by: Maxime Ripard maxime@cerno.tech --- drivers/gpu/drm/vc4/vc4_kms.c | 13 ++++++------- 1 file changed, 6 insertions(+), 7 deletions(-)
diff --git a/drivers/gpu/drm/vc4/vc4_kms.c b/drivers/gpu/drm/vc4/vc4_kms.c index ba310c0ab5f6..8937eb0b751d 100644 --- a/drivers/gpu/drm/vc4/vc4_kms.c +++ b/drivers/gpu/drm/vc4/vc4_kms.c @@ -794,6 +794,7 @@ static int vc4_pv_muxing_atomic_check(struct drm_device *dev, to_vc4_crtc_state(new_crtc_state); struct vc4_crtc *vc4_crtc = to_vc4_crtc(crtc); unsigned int matching_channels; + unsigned int channel;
/* Nothing to do here, let's skip it */ if (old_crtc_state->enable == new_crtc_state->enable) @@ -834,14 +835,12 @@ static int vc4_pv_muxing_atomic_check(struct drm_device *dev, * but it works so far. */ matching_channels = hvs_new_state->unassigned_channels & vc4_crtc->data->hvs_available_channels; - if (matching_channels) { - unsigned int channel = ffs(matching_channels) - 1; - - new_vc4_crtc_state->assigned_channel = channel; - hvs_new_state->unassigned_channels &= ~BIT(channel); - } else { + if (!matching_channels) return -EINVAL; - } + + channel = ffs(matching_channels) - 1; + new_vc4_crtc_state->assigned_channel = channel; + hvs_new_state->unassigned_channels &= ~BIT(channel); }
return 0;