Hi Miquel, kernel test robot noticed the following build warnings: [auto build test WARNING on linus/master] [also build test WARNING on v6.5-rc4 next-20230731] [cannot apply to xilinx-xlnx/master] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use '--base' as documented in https://git-scm.com/docs/git-format-patch#_base_tree_information] url: https://github.com/intel-lab-lkp/linux/commits/Miquel-Raynal/dmaengine-xilinx-xdma-Fix-interrupt-vector-setting/20230731-181620 base: linus/master patch link: https://lore.kernel.org/r/20230731101442.792514-5-miquel.raynal%40bootlin.com patch subject: [PATCH 4/4] dmaengine: xilinx: xdma: Support cyclic transfers config: powerpc-randconfig-r026-20230731 (https://download.01.org/0day-ci/archive/20230731/202307312225.9ewyJsVx-lkp@xxxxxxxxx/config) compiler: clang version 17.0.0 (https://github.com/llvm/llvm-project.git 4a5ac14ee968ff0ad5d2cc1ffa0299048db4c88a) reproduce: (https://download.01.org/0day-ci/archive/20230731/202307312225.9ewyJsVx-lkp@xxxxxxxxx/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@xxxxxxxxx> | Closes: https://lore.kernel.org/oe-kbuild-all/202307312225.9ewyJsVx-lkp@xxxxxxxxx/ All warnings (new ones prefixed by >>): >> drivers/dma/xilinx/xdma.c:716:6: warning: variable 'desc' is used uninitialized whenever 'if' condition is false [-Wsometimes-uninitialized] 716 | if (vd) | ^~ drivers/dma/xilinx/xdma.c:718:7: note: uninitialized use occurs here 718 | if (!desc || !desc->cyclic) { | ^~~~ drivers/dma/xilinx/xdma.c:716:2: note: remove the 'if' if its condition is always true 716 | if (vd) | ^~~~~~~ 717 | desc = to_xdma_desc(vd); | ~~~~~~~~~~~~~~~~ drivers/dma/xilinx/xdma.c:703:24: note: initialize the variable 'desc' to silence this warning 703 | struct xdma_desc *desc; | ^ | = NULL 1 warning generated. vim +716 drivers/dma/xilinx/xdma.c 697 698 static enum dma_status xdma_tx_status(struct dma_chan *chan, dma_cookie_t cookie, 699 struct dma_tx_state *state) 700 { 701 struct xdma_chan *xdma_chan = to_xdma_chan(chan); 702 struct virt_dma_desc *vd; 703 struct xdma_desc *desc; 704 enum dma_status ret; 705 unsigned long flags; 706 unsigned int period_idx; 707 u32 residue = 0; 708 709 ret = dma_cookie_status(chan, cookie, state); 710 if (ret == DMA_COMPLETE || !state) 711 return ret; 712 713 spin_lock_irqsave(&xdma_chan->vchan.lock, flags); 714 715 vd = vchan_find_desc(&xdma_chan->vchan, cookie); > 716 if (vd) 717 desc = to_xdma_desc(vd); 718 if (!desc || !desc->cyclic) { 719 spin_unlock_irqrestore(&xdma_chan->vchan.lock, flags); 720 return ret; 721 } 722 723 period_idx = desc->completed_desc_num % desc->periods; 724 residue = (desc->periods - period_idx) * desc->period_size; 725 726 spin_unlock_irqrestore(&xdma_chan->vchan.lock, flags); 727 728 dma_set_residue(state, residue); 729 730 return ret; 731 } 732 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
