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authorLinus Torvalds <torvalds@linux-foundation.org>2020-12-25 15:41:13 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2020-12-25 15:41:13 -0800
commit61d791365b72a89062fbbea69aa61479476da946 (patch)
tree1a0ddc065828cc2d1de6abd3396bb44e41b25b50 /drivers
parent5814bc2d4cc241c1a603fac2b5bf1bd4daa108fc (diff)
drm/amd/display: avoid uninitialized variable warning
clang (quite rightly) complains fairly loudly about the newly added mpc1_get_mpc_out_mux() function returning an uninitialized value if the 'opp_id' checks don't pass. This may not happen in practice, but the code really shouldn't return garbage if the sanity checks don't pass. So just initialize 'val' to zero to avoid the issue. Fixes: 110b055b2827 ("drm/amd/display: add getter routine to retrieve mpcc mux") Cc: Josip Pavic <Josip.Pavic@amd.com> Cc: Bindu Ramamurthy <bindu.r@amd.com> Cc: Alex Deucher <alexander.deucher@amd.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/gpu/drm/amd/display/dc/dcn10/dcn10_mpc.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_mpc.c b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_mpc.c
index a46cb20596fe..100ce0e28fd5 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_mpc.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_mpc.c
@@ -470,7 +470,7 @@ void mpc1_cursor_lock(struct mpc *mpc, int opp_id, bool lock)
unsigned int mpc1_get_mpc_out_mux(struct mpc *mpc, int opp_id)
{
struct dcn10_mpc *mpc10 = TO_DCN10_MPC(mpc);
- uint32_t val;
+ uint32_t val = 0;
if (opp_id < MAX_OPP && REG(MUX[opp_id]))
REG_GET(MUX[opp_id], MPC_OUT_MUX, &val);