linux-kernel - drivers/dma/at_hdmac.c:240: warning: Excess struct member 'sg_len' description in 'at

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Date: Fri, 15 Dec 2023 09:30:23 +0800
From: kernel test robot <lkp@...el.com>
To: Tudor Ambarus <tudor.ambarus@...rochip.com>
Cc: llvm@...ts.linux.dev, oe-kbuild-all@...ts.linux.dev,
	linux-kernel@...r.kernel.org, Vinod Koul <vkoul@...nel.org>
Subject: drivers/dma/at_hdmac.c:240: warning: Excess struct member 'sg_len'
 description in 'at_desc'

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   c7402612e2e61b76177f22e6e7f705adcbecc6fe
commit: ac803b56860f6506c55a3c9330007837e3f4edda dmaengine: at_hdmac: Convert driver to use virt-dma
date:   1 year, 1 month ago
config: arm-defconfig (https://download.01.org/0day-ci/archive/20231215/202312150931.ptq0FuhB-lkp@intel.com/config)
compiler: clang version 14.0.6 (https://github.com/llvm/llvm-project.git f28c006a5895fc0e329fe15fead81e37457cb1d1)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20231215/202312150931.ptq0FuhB-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@...el.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202312150931.ptq0FuhB-lkp@intel.com/

All warnings (new ones prefixed by >>):

   drivers/dma/at_hdmac.c:240: warning: Function parameter or member 'sglen' not described in 'at_desc'
   drivers/dma/at_hdmac.c:240: warning: Function parameter or member 'boundary' not described in 'at_desc'
   drivers/dma/at_hdmac.c:240: warning: Function parameter or member 'dst_hole' not described in 'at_desc'
   drivers/dma/at_hdmac.c:240: warning: Function parameter or member 'src_hole' not described in 'at_desc'
   drivers/dma/at_hdmac.c:240: warning: Function parameter or member 'memset_buffer' not described in 'at_desc'
   drivers/dma/at_hdmac.c:240: warning: Function parameter or member 'memset_paddr' not described in 'at_desc'
   drivers/dma/at_hdmac.c:240: warning: Function parameter or member 'memset_vaddr' not described in 'at_desc'
>> drivers/dma/at_hdmac.c:240: warning: Excess struct member 'sg_len' description in 'at_desc'
   drivers/dma/at_hdmac.c:249: warning: cannot understand function prototype: 'enum atc_status '
   drivers/dma/at_hdmac.c:284: warning: Function parameter or member 'cyclic' not described in 'at_dma_chan'
   drivers/dma/at_hdmac.c:348: warning: Function parameter or member 'regs' not described in 'at_dma'
   drivers/dma/at_hdmac.c:348: warning: Function parameter or member 'memset_pool' not described in 'at_dma'
   drivers/dma/at_hdmac.c:348: warning: Excess struct member 'atdma_devtype' description in 'at_dma'
   drivers/dma/at_hdmac.c:348: warning: Excess struct member 'ch_regs' description in 'at_dma'


vim +240 drivers/dma/at_hdmac.c

ac803b56860f65 Tudor Ambarus 2022-10-25  216  
5cecadc3e2a4fb Tudor Ambarus 2022-10-25  217  /**
5cecadc3e2a4fb Tudor Ambarus 2022-10-25  218   * struct at_desc - software descriptor
ac803b56860f65 Tudor Ambarus 2022-10-25  219   * @vd: pointer to the virtual dma descriptor.
ac803b56860f65 Tudor Ambarus 2022-10-25  220   * @atchan: pointer to the atmel dma channel.
5cecadc3e2a4fb Tudor Ambarus 2022-10-25  221   * @total_len: total transaction byte count
ac803b56860f65 Tudor Ambarus 2022-10-25  222   * @sg_len: number of sg entries.
ac803b56860f65 Tudor Ambarus 2022-10-25  223   * @sg: array of sgs.
5cecadc3e2a4fb Tudor Ambarus 2022-10-25  224   */
5cecadc3e2a4fb Tudor Ambarus 2022-10-25  225  struct at_desc {
ac803b56860f65 Tudor Ambarus 2022-10-25  226  	struct				virt_dma_desc vd;
ac803b56860f65 Tudor Ambarus 2022-10-25  227  	struct				at_dma_chan *atchan;
5cecadc3e2a4fb Tudor Ambarus 2022-10-25  228  	size_t				total_len;
ac803b56860f65 Tudor Ambarus 2022-10-25  229  	unsigned int			sglen;
5cecadc3e2a4fb Tudor Ambarus 2022-10-25  230  	/* Interleaved data */
5cecadc3e2a4fb Tudor Ambarus 2022-10-25  231  	size_t				boundary;
5cecadc3e2a4fb Tudor Ambarus 2022-10-25  232  	size_t				dst_hole;
5cecadc3e2a4fb Tudor Ambarus 2022-10-25  233  	size_t				src_hole;
5cecadc3e2a4fb Tudor Ambarus 2022-10-25  234  
5cecadc3e2a4fb Tudor Ambarus 2022-10-25  235  	/* Memset temporary buffer */
5cecadc3e2a4fb Tudor Ambarus 2022-10-25  236  	bool				memset_buffer;
5cecadc3e2a4fb Tudor Ambarus 2022-10-25  237  	dma_addr_t			memset_paddr;
5cecadc3e2a4fb Tudor Ambarus 2022-10-25  238  	int				*memset_vaddr;
ac803b56860f65 Tudor Ambarus 2022-10-25  239  	struct atdma_sg			sg[];
5cecadc3e2a4fb Tudor Ambarus 2022-10-25 @240  };
5cecadc3e2a4fb Tudor Ambarus 2022-10-25  241  

:::::: The code at line 240 was first introduced by commit
:::::: 5cecadc3e2a4fb72ab37d9420df0a9e1179b8a3e dmaengine: at_hdmac: Keep register definitions and structures private to at_hdmac.c

:::::: TO: Tudor Ambarus <tudor.ambarus@...rochip.com>
:::::: CC: Vinod Koul <vkoul@...nel.org>

-- 
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https://github.com/intel/lkp-tests/wiki