tree: https://github.com/intel/linux-intel-lts.git 5.4/yocto head: eeb611e5394c56d45c5cc8f7dc484c9f19e93143 commit: 2baf6e1cd6f179dd497cfc10294920e99bc3a66e [39/1142] dmaengine: dw-axi-dma: support slave dma mode config: i386-randconfig-m021-20201209 (attached as .config) compiler: gcc-9 (Debian 9.3.0-15) 9.3.0 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; Reported-by: Dan Carpenter <dan.carpenter(a)oracle.com&gt; smatch warnings: drivers/dma/dw-axi-dmac/dw-axi-dmac-platform.c:941 axi_chan_handle_err() warn: inconsistent returns 'chan->vc.lock'. drivers/dma/dw-axi-dmac/dw-axi-dmac-platform.c:941 axi_chan_handle_err() warn: inconsistent returns 'flags'. vim +941 drivers/dma/dw-axi-dmac/dw-axi-dmac-platform.c 1fe20f1b84548b Eugeniy Paltsev 2018-03-06 912 1fe20f1b84548b Eugeniy Paltsev 2018-03-06 913 static noinline void axi_chan_handle_err(struct axi_dma_chan *chan, u32 status) 1fe20f1b84548b Eugeniy Paltsev 2018-03-06 914 { 1fe20f1b84548b Eugeniy Paltsev 2018-03-06 915 struct virt_dma_desc *vd; 1fe20f1b84548b Eugeniy Paltsev 2018-03-06 916 unsigned long flags; 1fe20f1b84548b Eugeniy Paltsev 2018-03-06 917 1fe20f1b84548b Eugeniy Paltsev 2018-03-06 918 spin_lock_irqsave(&chan->vc.lock, flags); 1fe20f1b84548b Eugeniy Paltsev 2018-03-06 919 1fe20f1b84548b Eugeniy Paltsev 2018-03-06 920 axi_chan_disable(chan); 1fe20f1b84548b Eugeniy Paltsev 2018-03-06 921 1fe20f1b84548b Eugeniy Paltsev 2018-03-06 922 /* The bad descriptor currently is in the head of vc list */ 1fe20f1b84548b Eugeniy Paltsev 2018-03-06 923 vd = vchan_next_desc(&chan->vc); 2baf6e1cd6f179 Sia Jee Heng 2020-06-26 924 if (!vd) 2baf6e1cd6f179 Sia Jee Heng 2020-06-26 925 return; ^^^^^^^ spin_unlock_irqrestore(&chan->vc.lock, flags); before returning. 2baf6e1cd6f179 Sia Jee Heng 2020-06-26 926 1fe20f1b84548b Eugeniy Paltsev 2018-03-06 927 /* Remove the completed descriptor from issued list */ 1fe20f1b84548b Eugeniy Paltsev 2018-03-06 928 list_del(&vd->node); 1fe20f1b84548b Eugeniy Paltsev 2018-03-06 929 1fe20f1b84548b Eugeniy Paltsev 2018-03-06 930 /* WARN about bad descriptor */ 1fe20f1b84548b Eugeniy Paltsev 2018-03-06 931 dev_err(chan2dev(chan), 1fe20f1b84548b Eugeniy Paltsev 2018-03-06 932 "Bad descriptor submitted for %s, cookie: %d, irq: 0x%08x\n", 1fe20f1b84548b Eugeniy Paltsev 2018-03-06 933 axi_chan_name(chan), vd->tx.cookie, status); 1fe20f1b84548b Eugeniy Paltsev 2018-03-06 934 axi_chan_list_dump_lli(chan, vd_to_axi_desc(vd)); 1fe20f1b84548b Eugeniy Paltsev 2018-03-06 935 1fe20f1b84548b Eugeniy Paltsev 2018-03-06 936 vchan_cookie_complete(vd); 1fe20f1b84548b Eugeniy Paltsev 2018-03-06 937 1fe20f1b84548b Eugeniy Paltsev 2018-03-06 938 /* Try to restart the controller */ 1fe20f1b84548b Eugeniy Paltsev 2018-03-06 939 axi_chan_start_first_queued(chan); 1fe20f1b84548b Eugeniy Paltsev 2018-03-06 940 1fe20f1b84548b Eugeniy Paltsev 2018-03-06 @941 spin_unlock_irqrestore(&chan->vc.lock, flags); 1fe20f1b84548b Eugeniy Paltsev 2018-03-06 942 } --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org