From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 319711DE2CF; Tue, 8 Oct 2024 12:51:04 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1728391865; cv=none; b=dpGTcy4kqQ40UOrxEdVLBW+fujn3Rva8IeROlU12LCnTje4az2eV5CHdlpTdIDgiq72WZaZrVftgDI/HVGfGxzQkBg6qoiGd2RxCvJ7cdKIuaI+1xtI/K6pWN6CBp+ipHE3mVeZXz4MlDjPl4lSlD/DPI/fs9uNkRV9gK3iv5KM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1728391865; c=relaxed/simple; bh=6ul1ueODuLorEpPNRKvPOlBbU+HzG4KQUsHsHj3SMN8=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=ezhtXG44mLg/jUfmP/1O3bOFZAmWpIyIqUg2g/BSuy1zv3D5+lOEq3elvJP59pZL/+GI3vLHJqcTvhgVVlssGlVrqxSgHYIyOM7LozEq+xbpYXhd0OKbARLrecsQ9rKLEFtzUNyexkfp9qVx4K6SrpbsCyywoidLJazwfrxlogk= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=lAeetx75; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="lAeetx75" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 07B39C4CECC; Tue, 8 Oct 2024 12:51:03 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1728391864; bh=6ul1ueODuLorEpPNRKvPOlBbU+HzG4KQUsHsHj3SMN8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=lAeetx75q4ZwEcmxbwFeqzFCFV7UoACIsxAcHm79i7qNijRTg2cM8uD/5nEwgUGr4 F+sCNjURPpkz3LbwOpmqVCpgpi/YlNpYwIkLxu9GhToaCpVT6AEz4DwCY9Aeckr7ys mt8Gzu68ZA8vNO6W/+dpnx72gQ0XnmJUsKgBmIGY= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Rodrigo Siqueira , Jerry Zuo , Alex Hung , Daniel Wheeler , Alex Deucher , Sasha Levin Subject: [PATCH 6.11 205/558] drm/amd/display: Check null pointers before used Date: Tue, 8 Oct 2024 14:03:55 +0200 Message-ID: <20241008115710.412050604@linuxfoundation.org> X-Mailer: git-send-email 2.46.2 In-Reply-To: <20241008115702.214071228@linuxfoundation.org> References: <20241008115702.214071228@linuxfoundation.org> User-Agent: quilt/0.67 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.11-stable review patch. If anyone has any objections, please let me know. ------------------ From: Alex Hung [ Upstream commit be1fb44389ca3038ad2430dac4234669bc177ee3 ] [WHAT & HOW] Poniters, such as dc->clk_mgr, are null checked previously in the same function, so Coverity warns "implies that "dc->clk_mgr" might be null". As a result, these pointers need to be checked when used again. This fixes 10 FORWARD_NULL issues reported by Coverity. Reviewed-by: Rodrigo Siqueira Signed-off-by: Jerry Zuo Signed-off-by: Alex Hung Tested-by: Daniel Wheeler Signed-off-by: Alex Deucher Signed-off-by: Sasha Levin --- .../drm/amd/display/dc/clk_mgr/dce110/dce110_clk_mgr.c | 2 +- drivers/gpu/drm/amd/display/dc/hubp/dcn10/dcn10_hubp.c | 3 ++- drivers/gpu/drm/amd/display/dc/hubp/dcn20/dcn20_hubp.c | 3 ++- drivers/gpu/drm/amd/display/dc/hwss/dce110/dce110_hwseq.c | 5 +++-- drivers/gpu/drm/amd/display/dc/hwss/dcn10/dcn10_hwseq.c | 4 ++-- drivers/gpu/drm/amd/display/dc/hwss/dcn31/dcn31_hwseq.c | 4 ++-- drivers/gpu/drm/amd/display/dc/hwss/dcn35/dcn35_hwseq.c | 8 ++++---- .../amd/display/dc/link/protocols/link_dp_capability.c | 2 +- 8 files changed, 17 insertions(+), 14 deletions(-) diff --git a/drivers/gpu/drm/amd/display/dc/clk_mgr/dce110/dce110_clk_mgr.c b/drivers/gpu/drm/amd/display/dc/clk_mgr/dce110/dce110_clk_mgr.c index 78df96882d6ec..f8409453434c1 100644 --- a/drivers/gpu/drm/amd/display/dc/clk_mgr/dce110/dce110_clk_mgr.c +++ b/drivers/gpu/drm/amd/display/dc/clk_mgr/dce110/dce110_clk_mgr.c @@ -195,7 +195,7 @@ void dce11_pplib_apply_display_requirements( * , then change minimum memory clock based on real-time bandwidth * limitation. */ - if ((dc->ctx->asic_id.chip_family == FAMILY_AI) && + if (dc->bw_vbios && (dc->ctx->asic_id.chip_family == FAMILY_AI) && ASICREV_IS_VEGA20_P(dc->ctx->asic_id.hw_internal_rev) && (context->stream_count >= 2)) { pp_display_cfg->min_memory_clock_khz = max(pp_display_cfg->min_memory_clock_khz, (uint32_t) div64_s64( diff --git a/drivers/gpu/drm/amd/display/dc/hubp/dcn10/dcn10_hubp.c b/drivers/gpu/drm/amd/display/dc/hubp/dcn10/dcn10_hubp.c index bf399819ca800..22ac2b7e49aea 100644 --- a/drivers/gpu/drm/amd/display/dc/hubp/dcn10/dcn10_hubp.c +++ b/drivers/gpu/drm/amd/display/dc/hubp/dcn10/dcn10_hubp.c @@ -749,7 +749,8 @@ bool hubp1_is_flip_pending(struct hubp *hubp) if (flip_pending) return true; - if (earliest_inuse_address.grph.addr.quad_part != hubp->request_address.grph.addr.quad_part) + if (hubp && + earliest_inuse_address.grph.addr.quad_part != hubp->request_address.grph.addr.quad_part) return true; return false; diff --git a/drivers/gpu/drm/amd/display/dc/hubp/dcn20/dcn20_hubp.c b/drivers/gpu/drm/amd/display/dc/hubp/dcn20/dcn20_hubp.c index 6bba020ad6fbf..0637e4c552d8a 100644 --- a/drivers/gpu/drm/amd/display/dc/hubp/dcn20/dcn20_hubp.c +++ b/drivers/gpu/drm/amd/display/dc/hubp/dcn20/dcn20_hubp.c @@ -927,7 +927,8 @@ bool hubp2_is_flip_pending(struct hubp *hubp) if (flip_pending) return true; - if (earliest_inuse_address.grph.addr.quad_part != hubp->request_address.grph.addr.quad_part) + if (hubp && + earliest_inuse_address.grph.addr.quad_part != hubp->request_address.grph.addr.quad_part) return true; return false; diff --git a/drivers/gpu/drm/amd/display/dc/hwss/dce110/dce110_hwseq.c b/drivers/gpu/drm/amd/display/dc/hwss/dce110/dce110_hwseq.c index fc0d2077aaec4..96371dac72fc1 100644 --- a/drivers/gpu/drm/amd/display/dc/hwss/dce110/dce110_hwseq.c +++ b/drivers/gpu/drm/amd/display/dc/hwss/dce110/dce110_hwseq.c @@ -950,7 +950,7 @@ void dce110_edp_backlight_control( { struct dc_context *ctx = link->ctx; struct bp_transmitter_control cntl = { 0 }; - uint8_t pwrseq_instance; + uint8_t pwrseq_instance = 0; unsigned int pre_T11_delay = OLED_PRE_T11_DELAY; unsigned int post_T7_delay = OLED_POST_T7_DELAY; @@ -1003,7 +1003,8 @@ void dce110_edp_backlight_control( */ /* dc_service_sleep_in_milliseconds(50); */ /*edp 1.2*/ - pwrseq_instance = link->panel_cntl->pwrseq_inst; + if (link->panel_cntl) + pwrseq_instance = link->panel_cntl->pwrseq_inst; if (cntl.action == TRANSMITTER_CONTROL_BACKLIGHT_ON) { if (!link->dc->config.edp_no_power_sequencing) diff --git a/drivers/gpu/drm/amd/display/dc/hwss/dcn10/dcn10_hwseq.c b/drivers/gpu/drm/amd/display/dc/hwss/dcn10/dcn10_hwseq.c index 1d2be574f6680..83942abd08e84 100644 --- a/drivers/gpu/drm/amd/display/dc/hwss/dcn10/dcn10_hwseq.c +++ b/drivers/gpu/drm/amd/display/dc/hwss/dcn10/dcn10_hwseq.c @@ -1554,7 +1554,7 @@ void dcn10_init_hw(struct dc *dc) dc->clk_mgr->funcs->init_clocks(dc->clk_mgr); /* Align bw context with hw config when system resume. */ - if (dc->clk_mgr->clks.dispclk_khz != 0 && dc->clk_mgr->clks.dppclk_khz != 0) { + if (dc->clk_mgr && dc->clk_mgr->clks.dispclk_khz != 0 && dc->clk_mgr->clks.dppclk_khz != 0) { dc->current_state->bw_ctx.bw.dcn.clk.dispclk_khz = dc->clk_mgr->clks.dispclk_khz; dc->current_state->bw_ctx.bw.dcn.clk.dppclk_khz = dc->clk_mgr->clks.dppclk_khz; } @@ -1674,7 +1674,7 @@ void dcn10_init_hw(struct dc *dc) REG_UPDATE(DCFCLK_CNTL, DCFCLK_GATE_DIS, 0); } - if (dc->clk_mgr->funcs->notify_wm_ranges) + if (dc->clk_mgr && dc->clk_mgr->funcs->notify_wm_ranges) dc->clk_mgr->funcs->notify_wm_ranges(dc->clk_mgr); } diff --git a/drivers/gpu/drm/amd/display/dc/hwss/dcn31/dcn31_hwseq.c b/drivers/gpu/drm/amd/display/dc/hwss/dcn31/dcn31_hwseq.c index 746c522adf84c..3d4b31bd99469 100644 --- a/drivers/gpu/drm/amd/display/dc/hwss/dcn31/dcn31_hwseq.c +++ b/drivers/gpu/drm/amd/display/dc/hwss/dcn31/dcn31_hwseq.c @@ -256,10 +256,10 @@ void dcn31_init_hw(struct dc *dc) if (!dcb->funcs->is_accelerated_mode(dcb) && dc->res_pool->hubbub->funcs->init_watermarks) dc->res_pool->hubbub->funcs->init_watermarks(dc->res_pool->hubbub); - if (dc->clk_mgr->funcs->notify_wm_ranges) + if (dc->clk_mgr && dc->clk_mgr->funcs->notify_wm_ranges) dc->clk_mgr->funcs->notify_wm_ranges(dc->clk_mgr); - if (dc->clk_mgr->funcs->set_hard_max_memclk && !dc->clk_mgr->dc_mode_softmax_enabled) + if (dc->clk_mgr && dc->clk_mgr->funcs->set_hard_max_memclk && !dc->clk_mgr->dc_mode_softmax_enabled) dc->clk_mgr->funcs->set_hard_max_memclk(dc->clk_mgr); if (dc->res_pool->hubbub->funcs->force_pstate_change_control) diff --git a/drivers/gpu/drm/amd/display/dc/hwss/dcn35/dcn35_hwseq.c b/drivers/gpu/drm/amd/display/dc/hwss/dcn35/dcn35_hwseq.c index 80db40787e019..12a39dbc35419 100644 --- a/drivers/gpu/drm/amd/display/dc/hwss/dcn35/dcn35_hwseq.c +++ b/drivers/gpu/drm/amd/display/dc/hwss/dcn35/dcn35_hwseq.c @@ -235,7 +235,7 @@ void dcn35_init_hw(struct dc *dc) if (hws->funcs.enable_power_gating_plane) hws->funcs.enable_power_gating_plane(dc->hwseq, true); */ - if (res_pool->hubbub->funcs->dchubbub_init) + if (res_pool->hubbub && res_pool->hubbub->funcs->dchubbub_init) res_pool->hubbub->funcs->dchubbub_init(dc->res_pool->hubbub); /* If taking control over from VBIOS, we may want to optimize our first * mode set, so we need to skip powering down pipes until we know which @@ -328,10 +328,10 @@ void dcn35_init_hw(struct dc *dc) if (!dcb->funcs->is_accelerated_mode(dcb) && dc->res_pool->hubbub->funcs->init_watermarks) dc->res_pool->hubbub->funcs->init_watermarks(dc->res_pool->hubbub); - if (dc->clk_mgr->funcs->notify_wm_ranges) + if (dc->clk_mgr && dc->clk_mgr->funcs->notify_wm_ranges) dc->clk_mgr->funcs->notify_wm_ranges(dc->clk_mgr); - if (dc->clk_mgr->funcs->set_hard_max_memclk && !dc->clk_mgr->dc_mode_softmax_enabled) + if (dc->clk_mgr && dc->clk_mgr->funcs->set_hard_max_memclk && !dc->clk_mgr->dc_mode_softmax_enabled) dc->clk_mgr->funcs->set_hard_max_memclk(dc->clk_mgr); @@ -1054,7 +1054,7 @@ void dcn35_calc_blocks_to_gate(struct dc *dc, struct dc_state *context, if (pipe_ctx->plane_res.hubp) update_state->pg_pipe_res_update[PG_HUBP][pipe_ctx->plane_res.hubp->inst] = false; - if (pipe_ctx->plane_res.dpp) + if (pipe_ctx->plane_res.dpp && pipe_ctx->plane_res.hubp) update_state->pg_pipe_res_update[PG_DPP][pipe_ctx->plane_res.hubp->inst] = false; if (pipe_ctx->plane_res.dpp || pipe_ctx->stream_res.opp) diff --git a/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_capability.c b/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_capability.c index 46bb7a855bc21..60015e94c4aa8 100644 --- a/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_capability.c +++ b/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_capability.c @@ -2254,7 +2254,7 @@ bool dp_verify_link_cap_with_retries( memset(&link->verified_link_cap, 0, sizeof(struct dc_link_settings)); - if (!link_detect_connection_type(link, &type) || type == dc_connection_none) { + if (link->link_enc && (!link_detect_connection_type(link, &type) || type == dc_connection_none)) { link->verified_link_cap = fail_safe_link_settings; break; } else if (dp_verify_link_cap(link, known_limit_link_setting, &fail_count)) { -- 2.43.0