Re: [PATCH] amdgpu/dc: Remove unnecessary initialization in dc_link_handle_hpd_rx_irq()

[Guenter Roeck]

On Fri, Feb 9, 2018 at 3:12 PM, Matthias Kaehlcke  wrote:
> The initialization of 'result' is unnecessary, the variable is assigned
> unconditionally a few lines below. Removing the initialization also fixes
> the following warning when building with clang:
>
> drivers/gpu/drm/amd/amdgpu/../display/dc/core/dc_link_dp.c:1931:26:
>   error: implicit conversion from enumeration type 'enum ddc_result'
>   to different enumeration type 'enum dc_status' [-Werror,-Wenum-conversion]
> enum dc_status result = DDC_RESULT_UNKNOWN;
>
> Signed-off-by: Matthias Kaehlcke 

Reviewed-by: Guenter Roeck 

> ---
>  drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c 
> b/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c
> index 4ee4c03a6724..8e3a8c1395a3 100644
> --- a/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c
> +++ b/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c
> @@ -1926,7 +1926,7 @@ bool dc_link_handle_hpd_rx_irq(struct dc_link *link, 
> union hpd_irq_data *out_hpd
>  {
> union hpd_irq_data hpd_irq_dpcd_data = 0;
> union device_service_irq device_service_clear = { { 0 } };
> -   enum dc_status result = DDC_RESULT_UNKNOWN;
> +   enum dc_status result;
> bool status = false;
> /* For use cases related to down stream connection status change,
>  * PSR and device auto test, refer to function handle_sst_hpd_irq
> --
> 2.16.0.rc1.238.g530d649a79-goog
>
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[PATCH] amdgpu/dc: Remove unnecessary initialization in dc_link_handle_hpd_rx_irq()

[Matthias Kaehlcke]

The initialization of 'result' is unnecessary, the variable is assigned
unconditionally a few lines below. Removing the initialization also fixes
the following warning when building with clang:

drivers/gpu/drm/amd/amdgpu/../display/dc/core/dc_link_dp.c:1931:26:
  error: implicit conversion from enumeration type 'enum ddc_result'
  to different enumeration type 'enum dc_status' [-Werror,-Wenum-conversion]
enum dc_status result = DDC_RESULT_UNKNOWN;

Signed-off-by: Matthias Kaehlcke 
---
 drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c 
b/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c
index 4ee4c03a6724..8e3a8c1395a3 100644
--- a/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c
@@ -1926,7 +1926,7 @@ bool dc_link_handle_hpd_rx_irq(struct dc_link *link, 
union hpd_irq_data *out_hpd
 {
union hpd_irq_data hpd_irq_dpcd_data = 0;
union device_service_irq device_service_clear = { { 0 } };
-   enum dc_status result = DDC_RESULT_UNKNOWN;
+   enum dc_status result;
bool status = false;
/* For use cases related to down stream connection status change,
 * PSR and device auto test, refer to function handle_sst_hpd_irq
-- 
2.16.0.rc1.238.g530d649a79-goog

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