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drm/radeon/dce6/audio: make sure pin is valid before accessing it

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Make sure the audio pin is valid before accessing its members.

Noticed by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Alex Deucher 2013-09-03 14:03:21 -04:00
parent 63580c3e48
commit 7cc0a3d85b
1 changed files with 2 additions and 2 deletions
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4
drivers/gpu/drm/radeon/dce6_afmt.c
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@ -86,12 +86,12 @@ void dce6_afmt_select_pin(struct drm_encoder *encoder)
struct radeon_encoder *radeon_encoder = to_radeon_encoder(encoder);
struct radeon_encoder_atom_dig *dig = radeon_encoder->enc_priv;
u32 offset = dig->afmt->offset;
u32 id = dig->afmt->pin->id;
if (!dig->afmt->pin)
return;
WREG32(AFMT_AUDIO_SRC_CONTROL + offset, AFMT_AUDIO_SRC_SELECT(id));
WREG32(AFMT_AUDIO_SRC_CONTROL + offset,
AFMT_AUDIO_SRC_SELECT(dig->afmt->pin->id));
}
void dce6_afmt_write_speaker_allocation(struct drm_encoder *encoder)