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Gustavo A. R. Silva
293774413a
Create new structure NISLANDS_SMC_SWSTATE_SINGLE, as initialState.levels and ACPIState.levels are never actually used as flexible arrays. Those arrays can be used as simple objects of type NISLANDS_SMC_HW_PERFORMANCE_LEVEL, instead. Currently, the code fails because flexible array _levels_ in struct NISLANDS_SMC_SWSTATE doesn't allow for code that access the first element of initialState.levels and ACPIState.levels arrays: drivers/gpu/drm/radeon/ni_dpm.c: 1690 table->initialState.levels[0].mclk.vMPLL_AD_FUNC_CNTL = 1691 cpu_to_be32(ni_pi->clock_registers.mpll_ad_func_cntl); ... 1903: table->ACPIState.levels[0].mclk.vMPLL_AD_FUNC_CNTL = cpu_to_be32(mpll_ad_func_cntl); 1904: table->ACPIState.levels[0].mclk.vMPLL_AD_FUNC_CNTL_2 = cpu_to_be32(mpll_ad_func_cntl_2); because such element cannot exist without previously allocating any dynamic memory for it (which never actually happens). That's why struct NISLANDS_SMC_SWSTATE should only be used as type for object driverState and new struct SISLANDS_SMC_SWSTATE_SINGLE is created as type for objects initialState, ACPIState and ULVState. Also, with the change from one-element array to flexible-array member in commit434fb1e744("drm/radeon/nislands_smc.h: Replace one-element array with flexible-array member in struct NISLANDS_SMC_SWSTATE"), the size of dpmLevels in struct NISLANDS_SMC_STATETABLE should be fixed to be NISLANDS_MAX_SMC_PERFORMANCE_LEVELS_PER_SWSTATE instead of NISLANDS_MAX_SMC_PERFORMANCE_LEVELS_PER_SWSTATE - 1. Bug: https://lore.kernel.org/dri-devel/3eedbe78-1fbd-4763-a7f3-ac5665e76a4a@xenosoft.de/ Fixes:434fb1e744("drm/radeon/nislands_smc.h: Replace one-element array with flexible-array member in struct NISLANDS_SMC_SWSTATE") Cc: stable@vger.kernel.org Reported-by: Christian Zigotzky <chzigotzky@xenosoft.de> Tested-by: Christian Zigotzky <chzigotzky@xenosoft.de> Link: https://lore.kernel.org/dri-devel/9bb5fcbd-daf5-1669-b3e7-b8624b3c36f9@xenosoft.de/ Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.