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authorAlex Deucher <alexander.deucher@amd.com>2013-12-04 02:45:14 +0400
committerAlex Deucher <alexander.deucher@amd.com>2013-12-05 04:56:45 +0400
commit53dc0b0c94907db53444ba485f8ae95111b0d6fd (patch)
tree73039921fdf0f810956bc30bced78bea5b5afa48 /drivers/gpu/drm/radeon/dce6_afmt.c
parent0ca223b029a261e82fb2f50c52eb85d510f4260e (diff)
downloadlinux-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
Diffstat (limited to 'drivers/gpu/drm/radeon/dce6_afmt.c')
-rw-r--r--drivers/gpu/drm/radeon/dce6_afmt.c12
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;