tree: git://people.freedesktop.org/~agd5f/linux.git amd-staging-4.6 head: beebb009c05fd5a89617327a9cfb724f19cecf1b commit: ccb00a9a5dc119aae7a8c71834f658cb3f203ad7 [397/989] drm/amd/dal: Simplify return value for HW programming config: x86_64-allmodconfig (attached as .config) compiler: gcc-6 (Debian 6.1.1-1) 6.1.1 20160430 reproduce: git checkout ccb00a9a5dc119aae7a8c71834f658cb3f203ad7 # save the attached .config to linux build tree make ARCH=x86_64

Note: it may well be a FALSE warning. FWIW you are at least aware of it now.

All errors (new ones prefixed by >>):

drivers/gpu/drm/amd/amdgpu/../dal/dc/calcs/bandwidth_calcs.c: In function 'calculate_bandwidth':

...

drivers/gpu/drm/amd/amdgpu/../dal/dc/calcs/bandwidth_calcs.c:2780:7: error: array subscript is above array bounds [-Werror=array-bounds]

bw_max( ^~~~~~~ results->blackout_recovery_time, ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ bw_div( ~~~~~~~ (sub( ~~~~~ add( ~~~~ mul( ~~~~ bw_div( ~~~~~~~ mul( ~~~~ results->display_bandwidth[k], ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ results->useful_bytes_per_request[k]), ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ results->bytes_per_request[k]), ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ vbios->blackout_duration), ~~~~~~~~~~~~~~~~~~~~~~~~~~ bw_div( ~~~~~~~ mul( ~~~~ mul( ~~~~ mul( ~~~~ (add( ~~~~~ add( ~~~~ mul( ~~~~ vbios->mcifwrmc_urgent_latency, ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ int_to_fixed( ~~~~~~~~~~~~~ 2)), ~~~~ results->dmif_burst_time[i][j]), ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ results->mcifwr_burst_time[y_clk_level][sclk_level])), ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ results->dispclk), ~~~~~~~~~~~~~~~~~~ results->bytes_per_pixel[k]), ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ results->lines_interleaved_in_mem_access[k]), ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ results->latency_hiding_lines[k])), ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ results->adjusted_data_buffer_size[k])), ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ (sub( ~~~~~ bw_div( ~~~~~~~ mul( ~~~~ mul( ~~~~ results->dispclk, ~~~~~~~~~~~~~~~~~ results->bytes_per_pixel[k]), ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ results->lines_interleaved_in_mem_access[k]), ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ results->latency_hiding_lines[k]), ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ bw_div( ~~~~~~~ mul( ~~~~ results->display_bandwidth[k], ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ results->useful_bytes_per_request[k]), ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ results->bytes_per_request[k]))))); ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/gpu/drm/amd/amdgpu/../dal/dc/calcs/bandwidth_calcs.c:2802:41: error: array subscript is above array bounds [-Werror=array-bounds] results->dmif_burst_time[i][j]), ~~~~~~~~~~~~~~~~~~~~~~~~^~~ cc1: all warnings being treated as errors

vim +2780 drivers/gpu/drm/amd/amdgpu/../dal/dc/calcs/bandwidth_calcs.c

142fbbaab Harry Wentland 2015-11-25 2764 if (ltn(results->adjusted_data_buffer_size[k], 142fbbaab Harry Wentland 2015-11-25 2765 mul( 142fbbaab Harry Wentland 2015-11-25 2766 bw_div( 142fbbaab Harry Wentland 2015-11-25 2767 mul( 142fbbaab Harry Wentland 2015-11-25 2768 results->display_bandwidth[k], 142fbbaab Harry Wentland 2015-11-25 2769 results->useful_bytes_per_request[k]), 142fbbaab Harry Wentland 2015-11-25 2770 results->bytes_per_request[k]), 142fbbaab Harry Wentland 2015-11-25 2771 (add( 142fbbaab Harry Wentland 2015-11-25 2772 add( 142fbbaab Harry Wentland 2015-11-25 2773 vbios->blackout_duration, 142fbbaab Harry Wentland 2015-11-25 2774 mul( 142fbbaab Harry Wentland 2015-11-25 2775 vbios->mcifwrmc_urgent_latency, 142fbbaab Harry Wentland 2015-11-25 2776 int_to_fixed( 142fbbaab Harry Wentland 2015-11-25 2777 2))), 142fbbaab Harry Wentland 2015-11-25 2778 results->mcifwr_burst_time[y_clk_level][sclk_level]))))) { 142fbbaab Harry Wentland 2015-11-25 2779 results->blackout_recovery_time = 142fbbaab Harry Wentland 2015-11-25 @2780 bw_max( 142fbbaab Harry Wentland 2015-11-25 2781 results->blackout_recovery_time, 142fbbaab Harry Wentland 2015-11-25 2782 bw_div( 142fbbaab Harry Wentland 2015-11-25 2783 (sub( 142fbbaab Harry Wentland 2015-11-25 2784 add( 142fbbaab Harry Wentland 2015-11-25 2785 mul( 142fbbaab Harry Wentland 2015-11-25 2786 bw_div( 142fbbaab Harry Wentland 2015-11-25 2787 mul( 142fbbaab Harry Wentland 2015-11-25 2788 results->display_bandwidth[k],

:::::: The code at line 2780 was first introduced by commit :::::: 142fbbaab6655947879414a5a9730a6da12b7cf3 drm/amd/dal: Add dal display driver

:::::: TO: Harry Wentland harry.wentland@amd.com :::::: CC: Alex Deucher alexander.deucher@amd.com

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