linux-6.12-rc1/drivers/gpu/drm/amd/display/dc/dml/dcn20/display_rq_dlg_calc_20.c:653: Possible &/&& mixup ?

& (log2_dpte_req_height_ptes == 0) & surf_vert) //reduced, in this case, will have page fault within a group IMHO, looks odd. Was && intended ? Regards David Binderman

linux-6.6-rc1/drivers/gpu/drm/amd/display/dc/dcn30/dcn30_resource.c:2175:26: style: Array index 'i' is used before limits check. [arrayIndexThenCheck]

lt; optimal_dcfclk_for_uclk[j]) { Regards David Binderman

Re: drivers/gpu/drm/bridge/fsl-ldb.c:101: possible loss of information.

Hello there Laurent, >Would you be able to send a patch to fix this ? Sadly, no. My success rate with kernel patches is low enough to make it not worth trying. Regards David Binderman From: Laurent Pinchart Sent: 09 March 2023 09:26 To: David Binderman Cc: andrzej.ha...@intel.

Re: drivers/gpu/drm/bridge/fsl-ldb.c:101: possible loss of information.

put in a run time sanity check to make sure no 31 bit overflow. Just a couple of ideas for the code. Regards David Binderman

drivers/gpu/drm/bridge/fsl-ldb.c:101: possible loss of information.

long literals, like 3500UL, should have been used ? Regards David Binderman

dcn321_fpu.c:626: Array index check in wrong place ?

_uclk[j] && i < num_dcfclk_sta_targets) { It might be wise to move the limits check to before use. Regards David Binderman

linux-5.7-rc4/drivers/gpu/drm/amd/display/dc/dcn21/dcn21_resource.c:1393: bad loop termination condition ?

- 1; j >= 0; j--) { but unsigned int i, j, closest_clk_lvl; so it looks like the loop never terminates. Suggest code rework. Regards David Binderman ___ dri-devel mailing list dri-devel@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/dri-devel

drivers/gpu/drm/amd/display/modules/hdcp/hdcp1_execution.c:33:33: error: Buffer is accessed out of bounds

five bytes long. Suggest code rework. Regards David Binderman ___ dri-devel mailing list dri-devel@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/dri-devel

linux-5.6-rc1/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c:8411:45: error: Division by zero.

. Regards David Binderman ___ dri-devel mailing list dri-devel@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/dri-devel

linux-5.4-rc2/drivers/video/fbdev/amifb.c:1875: bad expression ?

ter code: datawords = (*(lspr + delta) << 16) | (*lspr); ++lspr; Regards David Binderman ___ dri-devel mailing list dri-devel@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/dri-devel

linux-5.3-rc3 bug report

t;entries) && buffer->fault[i]; i++) Regards David Binderman ___ dri-devel mailing list dri-devel@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/dri-devel

linux-5.1/drivers/video/fbdev/via/viafbdev.c:233: bad assignment ?

Hello there, [linux-5.1/drivers/video/fbdev/via/viafbdev.c:233]: (style) Assignment 'depth=30' is redundant with condition 'depth==30'. Source code is else if (depth == 30) depth = 30; Suggest code rework. Rega

linux-4.18-rc1/drivers/gpu/drm/amd/amdgpu/amdgpu_vcn.c:207: broken nested if ?

dgpu_dpm_enable_uvd(adev, true); else amdgpu_device_ip_set_powergating_state(adev, AMD_IP_BLOCK_TYPE_VCN, AMD_PG_STATE_UNGATE); So second function call never happens. Suggest code rework.

linux-4.16-rc5/drivers/gpu/drm/amd/display/dc/dce110/dce110_hw_sequencer.c:1723]: (warning) Possible null pointer dereference: pipe_ctx

e_ctx->stream->sink->link->connector_signal != SIGNAL_TYPE_EDP)     return false; Suggest add some code to deal with the case that the for loop doesn't find what it is looking for and so pipe_ctx is NULL. Regards David Binderman

linux-4.15-rc1/drivers/gpu/drm/i915/gvt/cmd_parser.c:1640: poor error checking ?

t static int find_bb_size(struct parser_exec_state *s) so the code isn't properly checking the return value. Suggest code rework. Regards David Binderman ___ dri-devel mailing list dri-devel@lists.freedesktop.org https://lists.freedesktop.org/ma

Re: drivers/gpu/drm/gma500/mdfld_intel_display.c:102:37: warning: bitwise comparison always evaluates to false [-Wtautological-compare]

Hello there, Code I looked at is in linux-4.14-rc6, released 20171023, so reasonably up to date. I did a further check on github.com/torvalds/linux and the code looks wrong there, too. So I don't see the fix you mentioned in either of the places I looked. Regards David Bind

drivers/gpu/drm/gma500/mdfld_intel_display.c:102:37: warning: bitwise comparison always evaluates to false [-Wtautological-compare]

t new code if ((temp & PIPEACONF_PIPE_STATE) != 0) break; Regards David Binderman ___ dri-devel mailing list dri-devel@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/dri-devel

linux-4.13/drivers/gpu/drm/nouveau/nvkm/subdev/therm/fan.c:86: possible faulty logic ?

slow_down_period; u64 delay; if (duty > target) delay = slow_down_period; else if (duty == target) delay = min(bump_period, slow_down_period) ; Last if can never be true, so call to min can never execute. Suggest code rework. Regar

drivers/gpu/drm/i915/intel_pm.c:4467: bad comparison ?

Hello there, drivers/gpu/drm/i915/intel_pm.c:4467]: (warning) Comparison of a boolean expression with an integer other than 0 or 1. Source code is else if ((ddb_allocation && ddb_allocation / fixed_16_16_to_u32_round_up(plane_blocks_per_line)) >= 1) Reg

linux-4.11/drivers/gpu/drm/bridge/tc358767.c:715]: (error) Signed integer overflow for expression 'max_tu_symbol<<23'.

se type long ? Regards David Binderman ___ dri-devel mailing list dri-devel@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/dri-devel

drivers/gpu/drm/nouveau/nvkm/engine/dma/usernv04.c:124:: possible unintended fallthrough ?

ESS_WO: dmaobj->flags0 |= 0x8000; case NV_MEM_ACCESS_RW: dmaobj->flags2 |= 0x0002; break; default: return -EINVAL; } Suggest either document the fallthrough or add the missing break. Regards Dav

drivers/gpu/drm/radeon/r100.c:3303]: (style) Redundant condition

in the same file: [drivers/gpu/drm/radeon/r100.c:2550]: (style) Variable 'tmp' is assigned a value that is never used. [drivers/gpu/drm/radeon/r100.c:2875]: (style) Variable 'tmp' is assigned a value that is never used. Regards David Binderman

drivers/gpu/drm/msm/hdmi/hdmi_hdcp.c:1319]: (style) Redundant condition

= hdcp_ctrl->hdcp_state)) { Suggest code rework. Regards David Binderman ___ dri-devel mailing list dri-devel@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/dri-devel

linux-4.11-rc1/drivers/gpu/drm/amd/amdgpu/vi.c: 3 bugs

r = vi_set_uvd_clock(adev, dclk, ixCG_DCLK_CNTL, ixCG_DCLK_STATUS); return 0; Regards David Binderman ___ dri-devel mailing list dri-devel@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/dri-devel

linux-4.11-rc1/drivers/gpu/drm/exynos/exynos5433_drm_decon.c:681: suspicious mask ?

e: [drivers/gpu/drm/exynos/exynos5433_drm_decon.c:131]: (style) Same expression on both sides of '|'. Source code is writel(TRIGCON_TE_AUTO_MASK | TRIGCON_SWTRIGEN | TRIGCON_TE_AUTO_MASK | TRIGCON_SWTRIGEN, Regards David Binderman _

include/drm/i915_drm.h:96: possible bad bitmask ?

ike #define INTEL_BSM_MASK (0xUL<< 20) might be better. Regards David Binderman

drivers/gpu/drm/amd/powerplay/hwmgr/polaris10_hwmgr.c:1812: possible pointless variable ?

er use the variable in some way, or delete it. Regards David Binderman

linux-4.7-rc3/drivers/gpu/drm/msm/mdp/mdp5/mdp5_kms.c: 2 * pointless tests ?

m_crtcs) return 0; crtc = priv->crtcs[pipe]; Feel free to mess this tentative patch about in any way you see fit. Regards David Binderman On Mon, Jun 13, 2016 at 4:27 PM, Rob Clark wrote: > yup, looks like we can drop the two pipe<0 checks. Care to send a patch? > >

linux-4.7-rc3/drivers/gpu/drm/msm/mdp/mdp5/mdp5_kms.c: 2 * pointless tests ?

(style) Checking if unsigned variable 'pipe' is less than zero. Duplicate a few lines further down. Regards David Binderman

linux-4.7-rc3/drivers/gpu/drm/amd/amdgpu/gfx_v7_0.c:4836: wierd condition ?

ned a value that is never used. [drivers/gpu/drm/amd/amdgpu/gfx_v7_0.c:4657]: (style) Variable 'tmp' is assigned a value that is never used. Regards David Binderman

drivers/gpu/drm/i915/i915_reg.h:90:shift-overflow problem ?

x) << 20) Regards David Binderman

linux-4.6-rc2/drivers/gpu/drm/radeon/si_dpm.c: multiple problems ?

#x27; is assigned a value that is never used. [linux-4.6-rc2/drivers/gpu/drm/radeon/si_dpm.c:4190]: (style) Variable 'voltage_found' is assigned a value that is never used. Regards David Binderman

linux-4.5/drivers/gpu/drm/gma500/oaktrail_crtc.c: 5 * uninit data ?

= clock; Suggest init all fields of local variable clock shortly after declaration, that way the function mrst_sdvo_find_best_pll can only ever return init'ed data. Regards David Binderman

linux-next/drivers/gpu/drm/rockchip/dw-mipi-dsi.c:470: poor error checking ?

Hello there, [linux-next/drivers/gpu/drm/rockchip/dw-mipi-dsi.c:470]: (style) Checking if unsigned variable 'bpp' is less than zero.     bpp = mipi_dsi_pixel_format_to_bpp(dsi->format);     if (bpp < 0) { but   unsigned int bpp, i, pre; Suggest code rework. Regards David Binderman

[linux-4.4-rc1/drivers/gpu/drm/gma500/mdfld_dsi_pkg_sender.c:206: possible missing comma ?

ic Read Data Avail"     "Special Packet Sent", Missing comma means the consecutive strings are concatenated and so there are only 31 elements in the array, not the presumably intended 32. Regards David Binderman

linux-4.2-rc1/drivers/gpu/drm/radeon/cik.c:1912: dead code block ?

        blackout = RREG32(MC_SHARED_BLACKOUT_CNTL);             WREG32(MC_SHARED_BLACKOUT_CNTL, blackout | 1);         } Regards David Binderman

linux-4.1-rc1/drivers/gpu/drm/msm/dsi/dsi_host.c:1799: possible missing break ?

tch (cmd) {     case MIPI_DSI_RX_ACKNOWLEDGE_AND_ERROR_REPORT:         pr_err("%s: rx ACK_ERR_PACLAGE\n", __func__);         ret = 0;     case MIPI_DSI_RX_GENERIC_SHORT_READ_RESPONSE_1BYTE:     case MIPI_DSI_RX_DCS_SHORT_READ_RESPONSE_1BYTE:         ret = dsi_short_read1_resp(buf, msg);