From: Linus Torvalds Date: Fri, 25 Dec 2020 23:41:13 +0000 (-0800) Subject: drm/amd/display: avoid uninitialized variable warning X-Git-Tag: microblaze-v5.12~14 X-Git-Url: http://git.monstr.eu/?p=linux-2.6-microblaze.git;a=commitdiff_plain;h=61d791365b72a89062fbbea69aa61479476da946 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 Cc: Bindu Ramamurthy Cc: Alex Deucher Signed-off-by: Linus Torvalds --- 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);