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Date:   Tue, 25 Jul 2017 10:52:37 +0800
From:   kbuild test robot <lkp@...el.com>
To:     Varadarajan Narayanan <varada@...eaurora.org>
Cc:     kbuild-all@...org, broonie@...nel.org, robh+dt@...nel.org,
        mark.rutland@....com, andy.gross@...aro.org,
        david.brown@...aro.org, linux-spi@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-msm@...r.kernel.org, linux-soc@...r.kernel.org,
        Varadarajan Narayanan <varada@...eaurora.org>
Subject: Re: [PATCH v5 14/14] spi: qup: Fix QUP version identify method

Hi Varadarajan,

[auto build test WARNING on spi/for-next]
[also build test WARNING on v4.13-rc2 next-20170724]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]

url:    https://github.com/0day-ci/linux/commits/Varadarajan-Narayanan/spi-qup-Fixes-and-add-support-for-64k-transfers/20170725-033101
base:   https://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi.git for-next
config: arm64-defconfig (attached as .config)
compiler: aarch64-linux-gnu-gcc (Debian 6.1.1-9) 6.1.1 20160705
reproduce:
        wget https://raw.githubusercontent.com/01org/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # save the attached .config to linux build tree
        make.cross ARCH=arm64 

All warnings (new ones prefixed by >>):

   drivers//spi/spi-qup.c: In function 'spi_qup_probe':
>> drivers//spi/spi-qup.c:1062:23: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast]
     controller->qup_v1 = (int)of_device_get_match_data(dev);
                          ^
   drivers//spi/spi-qup.c: In function 'spi_qup_transfer_one':
   drivers//spi/spi-qup.c:507:28: warning: 'tx_nents' may be used uninitialized in this function [-Wmaybe-uninitialized]
      for (; tx_sgl && tx_nents--; tx_sgl = sg_next(tx_sgl))
                       ~~~~~~~~^~
   drivers//spi/spi-qup.c:464:17: note: 'tx_nents' was declared here
      u32 rx_nents, tx_nents;
                    ^~~~~~~~
   drivers//spi/spi-qup.c:505:28: warning: 'rx_nents' may be used uninitialized in this function [-Wmaybe-uninitialized]
      for (; rx_sgl && rx_nents--; rx_sgl = sg_next(rx_sgl))
                       ~~~~~~~~^~
   drivers//spi/spi-qup.c:464:7: note: 'rx_nents' was declared here
      u32 rx_nents, tx_nents;
          ^~~~~~~~

vim +1062 drivers//spi/spi-qup.c

   969	
   970	static int spi_qup_probe(struct platform_device *pdev)
   971	{
   972		struct spi_master *master;
   973		struct clk *iclk, *cclk;
   974		struct spi_qup *controller;
   975		struct resource *res;
   976		struct device *dev;
   977		void __iomem *base;
   978		u32 max_freq, iomode, num_cs;
   979		int ret, irq, size;
   980	
   981		dev = &pdev->dev;
   982		res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
   983		base = devm_ioremap_resource(dev, res);
   984		if (IS_ERR(base))
   985			return PTR_ERR(base);
   986	
   987		irq = platform_get_irq(pdev, 0);
   988		if (irq < 0)
   989			return irq;
   990	
   991		cclk = devm_clk_get(dev, "core");
   992		if (IS_ERR(cclk))
   993			return PTR_ERR(cclk);
   994	
   995		iclk = devm_clk_get(dev, "iface");
   996		if (IS_ERR(iclk))
   997			return PTR_ERR(iclk);
   998	
   999		/* This is optional parameter */
  1000		if (of_property_read_u32(dev->of_node, "spi-max-frequency", &max_freq))
  1001			max_freq = SPI_MAX_RATE;
  1002	
  1003		if (!max_freq || max_freq > SPI_MAX_RATE) {
  1004			dev_err(dev, "invalid clock frequency %d\n", max_freq);
  1005			return -ENXIO;
  1006		}
  1007	
  1008		ret = clk_prepare_enable(cclk);
  1009		if (ret) {
  1010			dev_err(dev, "cannot enable core clock\n");
  1011			return ret;
  1012		}
  1013	
  1014		ret = clk_prepare_enable(iclk);
  1015		if (ret) {
  1016			clk_disable_unprepare(cclk);
  1017			dev_err(dev, "cannot enable iface clock\n");
  1018			return ret;
  1019		}
  1020	
  1021		master = spi_alloc_master(dev, sizeof(struct spi_qup));
  1022		if (!master) {
  1023			clk_disable_unprepare(cclk);
  1024			clk_disable_unprepare(iclk);
  1025			dev_err(dev, "cannot allocate master\n");
  1026			return -ENOMEM;
  1027		}
  1028	
  1029		/* use num-cs unless not present or out of range */
  1030		if (of_property_read_u32(dev->of_node, "num-cs", &num_cs) ||
  1031		    num_cs > SPI_NUM_CHIPSELECTS)
  1032			master->num_chipselect = SPI_NUM_CHIPSELECTS;
  1033		else
  1034			master->num_chipselect = num_cs;
  1035	
  1036		master->bus_num = pdev->id;
  1037		master->mode_bits = SPI_CPOL | SPI_CPHA | SPI_CS_HIGH | SPI_LOOP;
  1038		master->bits_per_word_mask = SPI_BPW_RANGE_MASK(4, 32);
  1039		master->max_speed_hz = max_freq;
  1040		master->transfer_one = spi_qup_transfer_one;
  1041		master->dev.of_node = pdev->dev.of_node;
  1042		master->auto_runtime_pm = true;
  1043		master->dma_alignment = dma_get_cache_alignment();
  1044		master->max_dma_len = SPI_MAX_XFER;
  1045	
  1046		platform_set_drvdata(pdev, master);
  1047	
  1048		controller = spi_master_get_devdata(master);
  1049	
  1050		controller->dev = dev;
  1051		controller->base = base;
  1052		controller->iclk = iclk;
  1053		controller->cclk = cclk;
  1054		controller->irq = irq;
  1055	
  1056		ret = spi_qup_init_dma(master, res->start);
  1057		if (ret == -EPROBE_DEFER)
  1058			goto error;
  1059		else if (!ret)
  1060			master->can_dma = spi_qup_can_dma;
  1061	
> 1062		controller->qup_v1 = (int)of_device_get_match_data(dev);
  1063	
  1064		if (!controller->qup_v1)
  1065			master->set_cs = spi_qup_set_cs;
  1066	
  1067		spin_lock_init(&controller->lock);
  1068		init_completion(&controller->done);
  1069	
  1070		iomode = readl_relaxed(base + QUP_IO_M_MODES);
  1071	
  1072		size = QUP_IO_M_OUTPUT_BLOCK_SIZE(iomode);
  1073		if (size)
  1074			controller->out_blk_sz = size * 16;
  1075		else
  1076			controller->out_blk_sz = 4;
  1077	
  1078		size = QUP_IO_M_INPUT_BLOCK_SIZE(iomode);
  1079		if (size)
  1080			controller->in_blk_sz = size * 16;
  1081		else
  1082			controller->in_blk_sz = 4;
  1083	
  1084		size = QUP_IO_M_OUTPUT_FIFO_SIZE(iomode);
  1085		controller->out_fifo_sz = controller->out_blk_sz * (2 << size);
  1086	
  1087		size = QUP_IO_M_INPUT_FIFO_SIZE(iomode);
  1088		controller->in_fifo_sz = controller->in_blk_sz * (2 << size);
  1089	
  1090		dev_info(dev, "IN:block:%d, fifo:%d, OUT:block:%d, fifo:%d\n",
  1091			 controller->in_blk_sz, controller->in_fifo_sz,
  1092			 controller->out_blk_sz, controller->out_fifo_sz);
  1093	
  1094		writel_relaxed(1, base + QUP_SW_RESET);
  1095	
  1096		ret = spi_qup_set_state(controller, QUP_STATE_RESET);
  1097		if (ret) {
  1098			dev_err(dev, "cannot set RESET state\n");
  1099			goto error_dma;
  1100		}
  1101	
  1102		writel_relaxed(0, base + QUP_OPERATIONAL);
  1103		writel_relaxed(0, base + QUP_IO_M_MODES);
  1104	
  1105		if (!controller->qup_v1)
  1106			writel_relaxed(0, base + QUP_OPERATIONAL_MASK);
  1107	
  1108		writel_relaxed(SPI_ERROR_CLK_UNDER_RUN | SPI_ERROR_CLK_OVER_RUN,
  1109			       base + SPI_ERROR_FLAGS_EN);
  1110	
  1111		/* if earlier version of the QUP, disable INPUT_OVERRUN */
  1112		if (controller->qup_v1)
  1113			writel_relaxed(QUP_ERROR_OUTPUT_OVER_RUN |
  1114				QUP_ERROR_INPUT_UNDER_RUN | QUP_ERROR_OUTPUT_UNDER_RUN,
  1115				base + QUP_ERROR_FLAGS_EN);
  1116	
  1117		writel_relaxed(0, base + SPI_CONFIG);
  1118		writel_relaxed(SPI_IO_C_NO_TRI_STATE, base + SPI_IO_CONTROL);
  1119	
  1120		ret = devm_request_irq(dev, irq, spi_qup_qup_irq,
  1121				       IRQF_TRIGGER_HIGH, pdev->name, controller);
  1122		if (ret)
  1123			goto error_dma;
  1124	
  1125		pm_runtime_set_autosuspend_delay(dev, MSEC_PER_SEC);
  1126		pm_runtime_use_autosuspend(dev);
  1127		pm_runtime_set_active(dev);
  1128		pm_runtime_enable(dev);
  1129	
  1130		ret = devm_spi_register_master(dev, master);
  1131		if (ret)
  1132			goto disable_pm;
  1133	
  1134		return 0;
  1135	
  1136	disable_pm:
  1137		pm_runtime_disable(&pdev->dev);
  1138	error_dma:
  1139		spi_qup_release_dma(master);
  1140	error:
  1141		clk_disable_unprepare(cclk);
  1142		clk_disable_unprepare(iclk);
  1143		spi_master_put(master);
  1144		return ret;
  1145	}
  1146	

---
0-DAY kernel test infrastructure                Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all                   Intel Corporation

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