diff options
| author | Alex Deucher <alexander.deucher@amd.com> | 2013-12-04 02:45:14 +0400 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2013-12-05 04:56:45 +0400 |
| commit | 53dc0b0c94907db53444ba485f8ae95111b0d6fd (patch) | |
| tree | 73039921fdf0f810956bc30bced78bea5b5afa48 | |
| parent | 0ca223b029a261e82fb2f50c52eb85d510f4260e (diff) | |
| download | linux-53dc0b0c94907db53444ba485f8ae95111b0d6fd.tar.xz | |
drm/radeon: fix null pointer dereference in dce6+ audio code
Don't crash if the encoder does not have an afmt struct.
bug:
https://bugs.freedesktop.org/show_bug.cgi?id=72283
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
| -rw-r--r-- | drivers/gpu/drm/radeon/dce6_afmt.c | 12 |
1 files changed, 7 insertions, 5 deletions
diff --git a/drivers/gpu/drm/radeon/dce6_afmt.c b/drivers/gpu/drm/radeon/dce6_afmt.c index 009f46e0ce72..de86493cbc44 100644 --- a/drivers/gpu/drm/radeon/dce6_afmt.c +++ b/drivers/gpu/drm/radeon/dce6_afmt.c @@ -93,11 +93,13 @@ void dce6_afmt_select_pin(struct drm_encoder *encoder) struct radeon_device *rdev = encoder->dev->dev_private; 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 offset; - if (!dig->afmt->pin) + if (!dig || !dig->afmt || !dig->afmt->pin) return; + offset = dig->afmt->offset; + WREG32(AFMT_AUDIO_SRC_CONTROL + offset, AFMT_AUDIO_SRC_SELECT(dig->afmt->pin->id)); } @@ -112,7 +114,7 @@ void dce6_afmt_write_latency_fields(struct drm_encoder *encoder, struct radeon_connector *radeon_connector = NULL; u32 tmp = 0, offset; - if (!dig->afmt->pin) + if (!dig || !dig->afmt || !dig->afmt->pin) return; offset = dig->afmt->pin->offset; @@ -156,7 +158,7 @@ void dce6_afmt_write_speaker_allocation(struct drm_encoder *encoder) u8 *sadb; int sad_count; - if (!dig->afmt->pin) + if (!dig || !dig->afmt || !dig->afmt->pin) return; offset = dig->afmt->pin->offset; @@ -217,7 +219,7 @@ void dce6_afmt_write_sad_regs(struct drm_encoder *encoder) { AZ_F0_CODEC_PIN_CONTROL_AUDIO_DESCRIPTOR13, HDMI_AUDIO_CODING_TYPE_WMA_PRO }, }; - if (!dig->afmt->pin) + if (!dig || !dig->afmt || !dig->afmt->pin) return; offset = dig->afmt->pin->offset; |