linux-kernel - [PATCH] amdgpu/dc: Remove unnecessary initialization in dc_link_handle_hpd_rx

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Message-Id: <20180209231233.107711-1-mka@chromium.org>
Date:   Fri,  9 Feb 2018 15:12:33 -0800
From:   Matthias Kaehlcke <mka@...omium.org>
To:     Alex Deucher <alexander.deucher@....com>,
        Christian König <christian.koenig@....com>,
        David Zhou <David1.Zhou@....com>,
        David Airlie <airlied@...ux.ie>,
        Harry Wentland <harry.wentland@....com>,
        Tony Cheng <Tony.Cheng@....com>,
        Wenjing Liu <Wenjing.Liu@....com>
Cc:     amd-gfx@...ts.freedesktop.org, dri-devel@...ts.freedesktop.org,
        linux-kernel@...r.kernel.org, Guenter Roeck <groeck@...omium.org>,
        Justin TerAvest <teravest@...omium.org>,
        Craig Bergstrom <craigb@...omium.org>,
        Matthias Kaehlcke <mka@...omium.org>
Subject: [PATCH] amdgpu/dc: Remove unnecessary initialization in dc_link_handle_hpd_rx_irq()

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 <mka@...omium.org>
---
 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