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charset=us-ascii Content-Disposition: inline Hi YueHaibing, FYI, the error/warning still remains. tree: https://github.com/intel/linux-intel-lts.git pr/57 head: 6fe7458ff80d33a5dba8b386c88d33ffd2ccb47d commit: c2be36ac2141b97f9a35ab560381317566bee357 [1/1] dmaengine: xilinx_dma: remove set but not used variable 'tail_segment' config: arm-randconfig-001-20250217 (https://download.01.org/0day-ci/archive/20250225/202502250446.PfrsARkV-lkp@intel.com/config) compiler: arm-linux-gnueabi-gcc (GCC) 14.2.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250225/202502250446.PfrsARkV-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 | Closes: https://lore.kernel.org/oe-kbuild-all/202502250446.PfrsARkV-lkp@intel.com/ All warnings (new ones prefixed by >>): drivers/dma/xilinx/xilinx_dma.c: In function 'xilinx_vdma_start_transfer': >> drivers/dma/xilinx/xilinx_dma.c:1102:49: warning: variable 'tail_desc' set but not used [-Wunused-but-set-variable] 1102 | struct xilinx_dma_tx_descriptor *desc, *tail_desc; | ^~~~~~~~~ drivers/dma/xilinx/xilinx_dma.c: In function 'xilinx_vdma_dma_prep_interleaved': drivers/dma/xilinx/xilinx_dma.c:1649:34: warning: array subscript 0 is outside array bounds of 'struct data_chunk[0]' [-Warray-bounds=] 1649 | if (!xt->numf || !xt->sgl[0].size) | ~~~~~~~^~~ In file included from include/linux/dma/xilinx_dma.h:16, from drivers/dma/xilinx/xilinx_dma.c:36: include/linux/dmaengine.h:168:27: note: while referencing 'sgl' 168 | struct data_chunk sgl[0]; | ^~~ drivers/dma/xilinx/xilinx_dma.c:1672:28: warning: array subscript 0 is outside array bounds of 'struct data_chunk[0]' [-Warray-bounds=] 1672 | hw->hsize = xt->sgl[0].size; | ~~~~~~~^~~ include/linux/dmaengine.h:168:27: note: while referencing 'sgl' 168 | struct data_chunk sgl[0]; | ^~~ drivers/dma/xilinx/xilinx_dma.c:1673:30: warning: array subscript 0 is outside array bounds of 'struct data_chunk[0]' [-Warray-bounds=] 1673 | hw->stride = (xt->sgl[0].icg + xt->sgl[0].size) << | ~~~~~~~^~~ include/linux/dmaengine.h:168:27: note: while referencing 'sgl' 168 | struct data_chunk sgl[0]; | ^~~ drivers/dma/xilinx/xilinx_dma.c: In function 'xilinx_dma_prep_interleaved': drivers/dma/xilinx/xilinx_dma.c:1993:34: warning: array subscript 0 is outside array bounds of 'struct data_chunk[0]' [-Warray-bounds=] 1993 | if (!xt->numf || !xt->sgl[0].size) | ~~~~~~~^~~ include/linux/dmaengine.h:168:27: note: while referencing 'sgl' 168 | struct data_chunk sgl[0]; | ^~~ drivers/dma/xilinx/xilinx_dma.c:2024:37: warning: array subscript 0 is outside array bounds of 'struct data_chunk[0]' [-Warray-bounds=] 2024 | hw->vsize_stride |= (xt->sgl[0].icg + xt->sgl[0].size) & | ~~~~~~~^~~ include/linux/dmaengine.h:168:27: note: while referencing 'sgl' 168 | struct data_chunk sgl[0]; | ^~~ drivers/dma/xilinx/xilinx_dma.c:2024:54: warning: array subscript 0 is outside array bounds of 'struct data_chunk[0]' [-Warray-bounds=] 2024 | hw->vsize_stride |= (xt->sgl[0].icg + xt->sgl[0].size) & | ~~~~~~~^~~ include/linux/dmaengine.h:168:27: note: while referencing 'sgl' 168 | struct data_chunk sgl[0]; | ^~~ drivers/dma/xilinx/xilinx_dma.c:2026:30: warning: array subscript 0 is outside array bounds of 'struct data_chunk[0]' [-Warray-bounds=] 2026 | hw->control = xt->sgl[0].size & XILINX_DMA_BD_HSIZE_MASK; | ~~~~~~~^~~ include/linux/dmaengine.h:168:27: note: while referencing 'sgl' 168 | struct data_chunk sgl[0]; | ^~~ vim +/tail_desc +1102 drivers/dma/xilinx/xilinx_dma.c 9cd4360de6090a drivers/dma/xilinx/xilinx_vdma.c Srikanth Thokala 2014-04-23 1094 9cd4360de6090a drivers/dma/xilinx/xilinx_vdma.c Srikanth Thokala 2014-04-23 1095 /** 9cd4360de6090a drivers/dma/xilinx/xilinx_vdma.c Srikanth Thokala 2014-04-23 1096 * xilinx_vdma_start_transfer - Starts VDMA transfer 9cd4360de6090a drivers/dma/xilinx/xilinx_vdma.c Srikanth Thokala 2014-04-23 1097 * @chan: Driver specific channel struct pointer 9cd4360de6090a drivers/dma/xilinx/xilinx_vdma.c Srikanth Thokala 2014-04-23 1098 */ 42c1a2ede4f6a3 drivers/dma/xilinx/xilinx_vdma.c Kedareswara rao Appana 2016-04-07 1099 static void xilinx_vdma_start_transfer(struct xilinx_dma_chan *chan) 9cd4360de6090a drivers/dma/xilinx/xilinx_vdma.c Srikanth Thokala 2014-04-23 1100 { 9cd4360de6090a drivers/dma/xilinx/xilinx_vdma.c Srikanth Thokala 2014-04-23 1101 struct xilinx_vdma_config *config = &chan->config; 42c1a2ede4f6a3 drivers/dma/xilinx/xilinx_vdma.c Kedareswara rao Appana 2016-04-07 @1102 struct xilinx_dma_tx_descriptor *desc, *tail_desc; fe0503e19310bd drivers/dma/xilinx/xilinx_dma.c Kedareswara rao Appana 2017-12-07 1103 u32 reg, j; b8349172b4001e drivers/dma/xilinx/xilinx_dma.c Andrea Merello 2018-11-20 1104 struct xilinx_vdma_tx_segment *segment, *last = NULL; b8349172b4001e drivers/dma/xilinx/xilinx_dma.c Andrea Merello 2018-11-20 1105 int i = 0; 9cd4360de6090a drivers/dma/xilinx/xilinx_vdma.c Srikanth Thokala 2014-04-23 1106 26c5e36931b3fe drivers/dma/xilinx/xilinx_vdma.c Kedareswara rao Appana 2016-02-26 1107 /* This function was invoked with lock held */ 9cd4360de6090a drivers/dma/xilinx/xilinx_vdma.c Srikanth Thokala 2014-04-23 1108 if (chan->err) 9cd4360de6090a drivers/dma/xilinx/xilinx_vdma.c Srikanth Thokala 2014-04-23 1109 return; 9cd4360de6090a drivers/dma/xilinx/xilinx_vdma.c Srikanth Thokala 2014-04-23 1110 21e02a3e05cfd3 drivers/dma/xilinx/xilinx_dma.c Kedareswara rao Appana 2017-12-07 1111 if (!chan->idle) 21e02a3e05cfd3 drivers/dma/xilinx/xilinx_dma.c Kedareswara rao Appana 2017-12-07 1112 return; 21e02a3e05cfd3 drivers/dma/xilinx/xilinx_dma.c Kedareswara rao Appana 2017-12-07 1113 9cd4360de6090a drivers/dma/xilinx/xilinx_vdma.c Srikanth Thokala 2014-04-23 1114 if (list_empty(&chan->pending_list)) 26c5e36931b3fe drivers/dma/xilinx/xilinx_vdma.c Kedareswara rao Appana 2016-02-26 1115 return; 9cd4360de6090a drivers/dma/xilinx/xilinx_vdma.c Srikanth Thokala 2014-04-23 1116 9cd4360de6090a drivers/dma/xilinx/xilinx_vdma.c Srikanth Thokala 2014-04-23 1117 desc = list_first_entry(&chan->pending_list, 42c1a2ede4f6a3 drivers/dma/xilinx/xilinx_vdma.c Kedareswara rao Appana 2016-04-07 1118 struct xilinx_dma_tx_descriptor, node); 7096f36e5388be drivers/dma/xilinx/xilinx_vdma.c Kedareswara rao Appana 2016-02-26 1119 tail_desc = list_last_entry(&chan->pending_list, 42c1a2ede4f6a3 drivers/dma/xilinx/xilinx_vdma.c Kedareswara rao Appana 2016-04-07 1120 struct xilinx_dma_tx_descriptor, node); 7096f36e5388be drivers/dma/xilinx/xilinx_vdma.c Kedareswara rao Appana 2016-02-26 1121 9cd4360de6090a drivers/dma/xilinx/xilinx_vdma.c Srikanth Thokala 2014-04-23 1122 /* Configure the hardware using info in the config structure */ 0894aa28aece68 drivers/dma/xilinx/xilinx_dma.c Radhey Shyam Pandey 2018-06-13 1123 if (chan->has_vflip) { 0894aa28aece68 drivers/dma/xilinx/xilinx_dma.c Radhey Shyam Pandey 2018-06-13 1124 reg = dma_read(chan, XILINX_VDMA_REG_ENABLE_VERTICAL_FLIP); 0894aa28aece68 drivers/dma/xilinx/xilinx_dma.c Radhey Shyam Pandey 2018-06-13 1125 reg &= ~XILINX_VDMA_ENABLE_VERTICAL_FLIP; 0894aa28aece68 drivers/dma/xilinx/xilinx_dma.c Radhey Shyam Pandey 2018-06-13 1126 reg |= config->vflip_en; 0894aa28aece68 drivers/dma/xilinx/xilinx_dma.c Radhey Shyam Pandey 2018-06-13 1127 dma_write(chan, XILINX_VDMA_REG_ENABLE_VERTICAL_FLIP, 0894aa28aece68 drivers/dma/xilinx/xilinx_dma.c Radhey Shyam Pandey 2018-06-13 1128 reg); 0894aa28aece68 drivers/dma/xilinx/xilinx_dma.c Radhey Shyam Pandey 2018-06-13 1129 } 0894aa28aece68 drivers/dma/xilinx/xilinx_dma.c Radhey Shyam Pandey 2018-06-13 1130 42c1a2ede4f6a3 drivers/dma/xilinx/xilinx_vdma.c Kedareswara rao Appana 2016-04-07 1131 reg = dma_ctrl_read(chan, XILINX_DMA_REG_DMACR); 9cd4360de6090a drivers/dma/xilinx/xilinx_vdma.c Srikanth Thokala 2014-04-23 1132 9cd4360de6090a drivers/dma/xilinx/xilinx_vdma.c Srikanth Thokala 2014-04-23 1133 if (config->frm_cnt_en) 42c1a2ede4f6a3 drivers/dma/xilinx/xilinx_vdma.c Kedareswara rao Appana 2016-04-07 1134 reg |= XILINX_DMA_DMACR_FRAMECNT_EN; 9cd4360de6090a drivers/dma/xilinx/xilinx_vdma.c Srikanth Thokala 2014-04-23 1135 else 42c1a2ede4f6a3 drivers/dma/xilinx/xilinx_vdma.c Kedareswara rao Appana 2016-04-07 1136 reg &= ~XILINX_DMA_DMACR_FRAMECNT_EN; 9cd4360de6090a drivers/dma/xilinx/xilinx_vdma.c Srikanth Thokala 2014-04-23 1137 b8349172b4001e drivers/dma/xilinx/xilinx_dma.c Andrea Merello 2018-11-20 1138 /* If not parking, enable circular mode */ 9cd4360de6090a drivers/dma/xilinx/xilinx_vdma.c Srikanth Thokala 2014-04-23 1139 if (config->park) 42c1a2ede4f6a3 drivers/dma/xilinx/xilinx_vdma.c Kedareswara rao Appana 2016-04-07 1140 reg &= ~XILINX_DMA_DMACR_CIRC_EN; b8349172b4001e drivers/dma/xilinx/xilinx_dma.c Andrea Merello 2018-11-20 1141 else b8349172b4001e drivers/dma/xilinx/xilinx_dma.c Andrea Merello 2018-11-20 1142 reg |= XILINX_DMA_DMACR_CIRC_EN; 9cd4360de6090a drivers/dma/xilinx/xilinx_vdma.c Srikanth Thokala 2014-04-23 1143 42c1a2ede4f6a3 drivers/dma/xilinx/xilinx_vdma.c Kedareswara rao Appana 2016-04-07 1144 dma_ctrl_write(chan, XILINX_DMA_REG_DMACR, reg); 9cd4360de6090a drivers/dma/xilinx/xilinx_vdma.c Srikanth Thokala 2014-04-23 1145 fe0503e19310bd drivers/dma/xilinx/xilinx_dma.c Kedareswara rao Appana 2017-12-07 1146 j = chan->desc_submitcount; fe0503e19310bd drivers/dma/xilinx/xilinx_dma.c Kedareswara rao Appana 2017-12-07 1147 reg = dma_read(chan, XILINX_DMA_REG_PARK_PTR); fe0503e19310bd drivers/dma/xilinx/xilinx_dma.c Kedareswara rao Appana 2017-12-07 1148 if (chan->direction == DMA_MEM_TO_DEV) { fe0503e19310bd drivers/dma/xilinx/xilinx_dma.c Kedareswara rao Appana 2017-12-07 1149 reg &= ~XILINX_DMA_PARK_PTR_RD_REF_MASK; fe0503e19310bd drivers/dma/xilinx/xilinx_dma.c Kedareswara rao Appana 2017-12-07 1150 reg |= j << XILINX_DMA_PARK_PTR_RD_REF_SHIFT; fe0503e19310bd drivers/dma/xilinx/xilinx_dma.c Kedareswara rao Appana 2017-12-07 1151 } else { fe0503e19310bd drivers/dma/xilinx/xilinx_dma.c Kedareswara rao Appana 2017-12-07 1152 reg &= ~XILINX_DMA_PARK_PTR_WR_REF_MASK; fe0503e19310bd drivers/dma/xilinx/xilinx_dma.c Kedareswara rao Appana 2017-12-07 1153 reg |= j << XILINX_DMA_PARK_PTR_WR_REF_SHIFT; 9cd4360de6090a drivers/dma/xilinx/xilinx_vdma.c Srikanth Thokala 2014-04-23 1154 } fe0503e19310bd drivers/dma/xilinx/xilinx_dma.c Kedareswara rao Appana 2017-12-07 1155 dma_write(chan, XILINX_DMA_REG_PARK_PTR, reg); 9cd4360de6090a drivers/dma/xilinx/xilinx_vdma.c Srikanth Thokala 2014-04-23 1156 9cd4360de6090a drivers/dma/xilinx/xilinx_vdma.c Srikanth Thokala 2014-04-23 1157 /* Start the hardware */ 42c1a2ede4f6a3 drivers/dma/xilinx/xilinx_vdma.c Kedareswara rao Appana 2016-04-07 1158 xilinx_dma_start(chan); 9cd4360de6090a drivers/dma/xilinx/xilinx_vdma.c Srikanth Thokala 2014-04-23 1159 9cd4360de6090a drivers/dma/xilinx/xilinx_vdma.c Srikanth Thokala 2014-04-23 1160 if (chan->err) 26c5e36931b3fe drivers/dma/xilinx/xilinx_vdma.c Kedareswara rao Appana 2016-02-26 1161 return; 9cd4360de6090a drivers/dma/xilinx/xilinx_vdma.c Srikanth Thokala 2014-04-23 1162 9cd4360de6090a drivers/dma/xilinx/xilinx_vdma.c Srikanth Thokala 2014-04-23 1163 /* Start the transfer */ a65cf5125b49f3 drivers/dma/xilinx/xilinx_vdma.c Kedareswara rao Appana 2016-04-06 1164 if (chan->desc_submitcount < chan->num_frms) a65cf5125b49f3 drivers/dma/xilinx/xilinx_vdma.c Kedareswara rao Appana 2016-04-06 1165 i = chan->desc_submitcount; a65cf5125b49f3 drivers/dma/xilinx/xilinx_vdma.c Kedareswara rao Appana 2016-04-06 1166 a65cf5125b49f3 drivers/dma/xilinx/xilinx_vdma.c Kedareswara rao Appana 2016-04-06 1167 list_for_each_entry(segment, &desc->segments, node) { b72db4005fe4bf drivers/dma/xilinx/xilinx_vdma.c Kedareswara rao Appana 2016-04-06 1168 if (chan->ext_addr) b72db4005fe4bf drivers/dma/xilinx/xilinx_vdma.c Kedareswara rao Appana 2016-04-06 1169 vdma_desc_write_64(chan, b72db4005fe4bf drivers/dma/xilinx/xilinx_vdma.c Kedareswara rao Appana 2016-04-06 1170 XILINX_VDMA_REG_START_ADDRESS_64(i++), b72db4005fe4bf drivers/dma/xilinx/xilinx_vdma.c Kedareswara rao Appana 2016-04-06 1171 segment->hw.buf_addr, b72db4005fe4bf drivers/dma/xilinx/xilinx_vdma.c Kedareswara rao Appana 2016-04-06 1172 segment->hw.buf_addr_msb); b72db4005fe4bf drivers/dma/xilinx/xilinx_vdma.c Kedareswara rao Appana 2016-04-06 1173 else 9cd4360de6090a drivers/dma/xilinx/xilinx_vdma.c Srikanth Thokala 2014-04-23 1174 vdma_desc_write(chan, 9cd4360de6090a drivers/dma/xilinx/xilinx_vdma.c Srikanth Thokala 2014-04-23 1175 XILINX_VDMA_REG_START_ADDRESS(i++), 9cd4360de6090a drivers/dma/xilinx/xilinx_vdma.c Srikanth Thokala 2014-04-23 1176 segment->hw.buf_addr); b72db4005fe4bf drivers/dma/xilinx/xilinx_vdma.c Kedareswara rao Appana 2016-04-06 1177 9cd4360de6090a drivers/dma/xilinx/xilinx_vdma.c Srikanth Thokala 2014-04-23 1178 last = segment; 9cd4360de6090a drivers/dma/xilinx/xilinx_vdma.c Srikanth Thokala 2014-04-23 1179 } 9cd4360de6090a drivers/dma/xilinx/xilinx_vdma.c Srikanth Thokala 2014-04-23 1180 9cd4360de6090a drivers/dma/xilinx/xilinx_vdma.c Srikanth Thokala 2014-04-23 1181 if (!last) 26c5e36931b3fe drivers/dma/xilinx/xilinx_vdma.c Kedareswara rao Appana 2016-02-26 1182 return; 9cd4360de6090a drivers/dma/xilinx/xilinx_vdma.c Srikanth Thokala 2014-04-23 1183 9cd4360de6090a drivers/dma/xilinx/xilinx_vdma.c Srikanth Thokala 2014-04-23 1184 /* HW expects these parameters to be same for one transaction */ 42c1a2ede4f6a3 drivers/dma/xilinx/xilinx_vdma.c Kedareswara rao Appana 2016-04-07 1185 vdma_desc_write(chan, XILINX_DMA_REG_HSIZE, last->hw.hsize); 42c1a2ede4f6a3 drivers/dma/xilinx/xilinx_vdma.c Kedareswara rao Appana 2016-04-07 1186 vdma_desc_write(chan, XILINX_DMA_REG_FRMDLY_STRIDE, 9cd4360de6090a drivers/dma/xilinx/xilinx_vdma.c Srikanth Thokala 2014-04-23 1187 last->hw.stride); 42c1a2ede4f6a3 drivers/dma/xilinx/xilinx_vdma.c Kedareswara rao Appana 2016-04-07 1188 vdma_desc_write(chan, XILINX_DMA_REG_VSIZE, last->hw.vsize); 9cd4360de6090a drivers/dma/xilinx/xilinx_vdma.c Srikanth Thokala 2014-04-23 1189 a65cf5125b49f3 drivers/dma/xilinx/xilinx_vdma.c Kedareswara rao Appana 2016-04-06 1190 chan->desc_submitcount++; a65cf5125b49f3 drivers/dma/xilinx/xilinx_vdma.c Kedareswara rao Appana 2016-04-06 1191 chan->desc_pendingcount--; fe0503e19310bd drivers/dma/xilinx/xilinx_dma.c Kedareswara rao Appana 2017-12-07 1192 list_del(&desc->node); fe0503e19310bd drivers/dma/xilinx/xilinx_dma.c Kedareswara rao Appana 2017-12-07 1193 list_add_tail(&desc->node, &chan->active_list); a65cf5125b49f3 drivers/dma/xilinx/xilinx_vdma.c Kedareswara rao Appana 2016-04-06 1194 if (chan->desc_submitcount == chan->num_frms) a65cf5125b49f3 drivers/dma/xilinx/xilinx_vdma.c Kedareswara rao Appana 2016-04-06 1195 chan->desc_submitcount = 0; 21e02a3e05cfd3 drivers/dma/xilinx/xilinx_dma.c Kedareswara rao Appana 2017-12-07 1196 21e02a3e05cfd3 drivers/dma/xilinx/xilinx_dma.c Kedareswara rao Appana 2017-12-07 1197 chan->idle = false; a65cf5125b49f3 drivers/dma/xilinx/xilinx_vdma.c Kedareswara rao Appana 2016-04-06 1198 } 9cd4360de6090a drivers/dma/xilinx/xilinx_vdma.c Srikanth Thokala 2014-04-23 1199 :::::: The code at line 1102 was first introduced by commit :::::: 42c1a2ede4f6a320d6843fc846f5466bff836a0c dmaengine: vdma: Rename xilinx_vdma_ prefix to xilinx_dma :::::: TO: Kedareswara rao Appana :::::: CC: Vinod Koul -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki