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drm/amd/display: Don't return ddc result and read_bytes in same return value

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The two ranges overlap.

Signed-off-by: Harry Wentland <harry.wentland@amd.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Harry Wentland
2018-04-24 10:49:20 -04:00
committed by Alex Deucher
parent 6e65fb8620
commit 018d82e5f0
3 changed files with 22 additions and 13 deletions
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20
drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c
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@@ -83,21 +83,22 @@ static ssize_t dm_dp_aux_transfer(struct drm_dp_aux *aux,
enum i2c_mot_mode mot = (msg->request & DP_AUX_I2C_MOT) ?
I2C_MOT_TRUE : I2C_MOT_FALSE;
enum ddc_result res;
ssize_t read_bytes;
uint32_t read_bytes = msg->size;
if (WARN_ON(msg->size > 16))
return -E2BIG;
switch (msg->request & ~DP_AUX_I2C_MOT) {
case DP_AUX_NATIVE_READ:
read_bytes = dal_ddc_service_read_dpcd_data(
res = dal_ddc_service_read_dpcd_data(
TO_DM_AUX(aux)->ddc_service,
false,
I2C_MOT_UNDEF,
msg->address,
msg->buffer,
msg->size);
return read_bytes;
msg->size,
&read_bytes);
break;
case DP_AUX_NATIVE_WRITE:
res = dal_ddc_service_write_dpcd_data(
TO_DM_AUX(aux)->ddc_service,
@@ -108,14 +109,15 @@ static ssize_t dm_dp_aux_transfer(struct drm_dp_aux *aux,
msg->size);
break;
case DP_AUX_I2C_READ:
read_bytes = dal_ddc_service_read_dpcd_data(
res = dal_ddc_service_read_dpcd_data(
TO_DM_AUX(aux)->ddc_service,
true,
mot,
msg->address,
msg->buffer,
msg->size);
return read_bytes;
msg->size,
&read_bytes);
break;
case DP_AUX_I2C_WRITE:
res = dal_ddc_service_write_dpcd_data(
TO_DM_AUX(aux)->ddc_service,
@@ -137,7 +139,9 @@ static ssize_t dm_dp_aux_transfer(struct drm_dp_aux *aux,
r == DDC_RESULT_SUCESSFULL);
#endif
return msg->size;
if (res != DDC_RESULT_SUCESSFULL)
return -EIO;
return read_bytes;
}
static enum drm_connector_status