On Wed, Sep 02, 2020 at 11:15:47AM +0800, kernel test robot wrote: > tree: https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging.git staging-testing > head: 4c6491a343e91a5a2a699b0b545f8ba1ec1e8c65 > commit: fbcfdfab4a2c4ec5e2195929528506fec39388f3 [62/88] staging: emxx_udc: Allow for building on !ARM > compiler: riscv32-linux-gcc (GCC) 9.3.0 [snip] > >> drivers/staging/emxx_udc/emxx_udc.c:2095:48: warning: Uninitialized variable: ep [uninitvar] > list_for_each_entry(ep, &udc->gadget.ep_list, ep.ep_list) { > ^ This warning's bogus. The ep here refers to a member name, not the variable ep. I'll send a patch for the other warnings though. > > # https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging.git/commit/?id=fbcfdfab4a2c4ec5e2195929528506fec39388f3 > git remote add staging https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging.git > git fetch --no-tags staging staging-testing > git checkout fbcfdfab4a2c4ec5e2195929528506fec39388f3 > vim +/result +839 drivers/staging/emxx_udc/emxx_udc.c > > 33aa8d45a4fea3 Magnus Damm 2014-06-06 785 > 33aa8d45a4fea3 Magnus Damm 2014-06-06 786 /*-------------------------------------------------------------------------*/ > e2d34dfdffcfd1 Cristian Sicilia 2018-11-17 787 static int _nbu2ss_out_dma(struct nbu2ss_udc *udc, struct nbu2ss_req *req, > e2d34dfdffcfd1 Cristian Sicilia 2018-11-17 788 u32 num, u32 length) > 33aa8d45a4fea3 Magnus Damm 2014-06-06 789 { > 5a012f67cbcb20 Alexis Lothoré 2017-05-10 790 dma_addr_t p_buffer; > 33aa8d45a4fea3 Magnus Damm 2014-06-06 791 u32 mpkt; > 33aa8d45a4fea3 Magnus Damm 2014-06-06 792 u32 lmpkt; > 33aa8d45a4fea3 Magnus Damm 2014-06-06 793 u32 dmacnt; > 33aa8d45a4fea3 Magnus Damm 2014-06-06 794 u32 burst = 1; > 33aa8d45a4fea3 Magnus Damm 2014-06-06 795 u32 data; > 33aa8d45a4fea3 Magnus Damm 2014-06-06 796 int result = -EINVAL; > 64407f6e7d158e Carmeli Tamir 2018-11-07 797 struct fc_regs __iomem *preg = udc->p_regs; > 33aa8d45a4fea3 Magnus Damm 2014-06-06 798 > 33aa8d45a4fea3 Magnus Damm 2014-06-06 799 if (req->dma_flag) > 33aa8d45a4fea3 Magnus Damm 2014-06-06 800 return 1; /* DMA is forwarded */ > 33aa8d45a4fea3 Magnus Damm 2014-06-06 801 > 8b77d94e69c33f Saiyam Doshi 2019-09-08 802 req->dma_flag = true; > 5a012f67cbcb20 Alexis Lothoré 2017-05-10 803 p_buffer = req->req.dma; > 5a012f67cbcb20 Alexis Lothoré 2017-05-10 804 p_buffer += req->req.actual; > 33aa8d45a4fea3 Magnus Damm 2014-06-06 805 > 33aa8d45a4fea3 Magnus Damm 2014-06-06 806 /* DMA Address */ > 5a012f67cbcb20 Alexis Lothoré 2017-05-10 807 _nbu2ss_writel(&preg->EP_DCR[num].EP_TADR, (u32)p_buffer); > 33aa8d45a4fea3 Magnus Damm 2014-06-06 808 > 33aa8d45a4fea3 Magnus Damm 2014-06-06 809 /* Number of transfer packets */ > 75d9c393763da3 Alexis Lothoré 2017-05-10 810 mpkt = _nbu2ss_readl(&preg->EP_REGS[num].EP_PCKT_ADRS) & EPN_MPKT; > 599b87809594e2 Janani Ravichandran 2016-02-11 811 dmacnt = length / mpkt; > 33aa8d45a4fea3 Magnus Damm 2014-06-06 812 lmpkt = (length % mpkt) & ~(u32)0x03; > 33aa8d45a4fea3 Magnus Damm 2014-06-06 813 > 2866914ce1f84f Cristina Moraru 2015-09-29 814 if (dmacnt > DMA_MAX_COUNT) { > 33aa8d45a4fea3 Magnus Damm 2014-06-06 815 dmacnt = DMA_MAX_COUNT; > 33aa8d45a4fea3 Magnus Damm 2014-06-06 816 lmpkt = 0; > 2866914ce1f84f Cristina Moraru 2015-09-29 817 } else if (lmpkt != 0) { > 2866914ce1f84f Cristina Moraru 2015-09-29 818 if (dmacnt == 0) > 33aa8d45a4fea3 Magnus Damm 2014-06-06 819 burst = 0; /* Burst OFF */ > 33aa8d45a4fea3 Magnus Damm 2014-06-06 820 dmacnt++; > 33aa8d45a4fea3 Magnus Damm 2014-06-06 821 } > 33aa8d45a4fea3 Magnus Damm 2014-06-06 822 > 33aa8d45a4fea3 Magnus Damm 2014-06-06 823 data = mpkt | (lmpkt << 16); > 33aa8d45a4fea3 Magnus Damm 2014-06-06 824 _nbu2ss_writel(&preg->EP_DCR[num].EP_DCR2, data); > 33aa8d45a4fea3 Magnus Damm 2014-06-06 825 > 75d9c393763da3 Alexis Lothoré 2017-05-10 826 data = ((dmacnt & 0xff) << 16) | DCR1_EPN_DIR0 | DCR1_EPN_REQEN; > 33aa8d45a4fea3 Magnus Damm 2014-06-06 827 _nbu2ss_writel(&preg->EP_DCR[num].EP_DCR1, data); > 33aa8d45a4fea3 Magnus Damm 2014-06-06 828 > 2866914ce1f84f Cristina Moraru 2015-09-29 829 if (burst == 0) { > 33aa8d45a4fea3 Magnus Damm 2014-06-06 830 _nbu2ss_writel(&preg->EP_REGS[num].EP_LEN_DCNT, 0); > 75d9c393763da3 Alexis Lothoré 2017-05-10 831 _nbu2ss_bitclr(&preg->EP_REGS[num].EP_DMA_CTRL, EPN_BURST_SET); > 33aa8d45a4fea3 Magnus Damm 2014-06-06 832 } else { > 33aa8d45a4fea3 Magnus Damm 2014-06-06 833 _nbu2ss_writel(&preg->EP_REGS[num].EP_LEN_DCNT > 33aa8d45a4fea3 Magnus Damm 2014-06-06 834 , (dmacnt << 16)); > 75d9c393763da3 Alexis Lothoré 2017-05-10 835 _nbu2ss_bitset(&preg->EP_REGS[num].EP_DMA_CTRL, EPN_BURST_SET); > 33aa8d45a4fea3 Magnus Damm 2014-06-06 836 } > 75d9c393763da3 Alexis Lothoré 2017-05-10 837 _nbu2ss_bitset(&preg->EP_REGS[num].EP_DMA_CTRL, EPN_DMA_EN); > 33aa8d45a4fea3 Magnus Damm 2014-06-06 838 > 33aa8d45a4fea3 Magnus Damm 2014-06-06 @839 result = length & ~(u32)0x03; > 33aa8d45a4fea3 Magnus Damm 2014-06-06 840 req->div_len = result; > 33aa8d45a4fea3 Magnus Damm 2014-06-06 841 > 33aa8d45a4fea3 Magnus Damm 2014-06-06 842 return result; > 33aa8d45a4fea3 Magnus Damm 2014-06-06 843 } > 33aa8d45a4fea3 Magnus Damm 2014-06-06 844 > > :::::: The code at line 839 was first introduced by commit > :::::: 33aa8d45a4fea3dc5d90338aad0867a66e0c38d5 staging: emxx_udc: Add Emma Mobile USB Gadget driver > > :::::: TO: Magnus Damm <damm+renesas@xxxxxxxxxxxxx> > :::::: CC: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> > > --- > 0-DAY CI Kernel Test Service, Intel Corporation > https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx _______________________________________________ devel mailing list devel@xxxxxxxxxxxxxxxxxxxxxx http://driverdev.linuxdriverproject.org/mailman/listinfo/driverdev-devel
