Re: [PATCH v5 14/14] spi: qup: Fix QUP version identify method

From: kbuild test robot
Date: Mon Jul 24 2017 - 22:58:51 EST

Next message: Srinivas Pandruvada: "Re: [PATCH] cpufreq: intel_pstate: Fix cpuinfo_cur_freq after performance governor changes"
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In reply to: Varadarajan Narayanan: "[PATCH v5 14/14] spi: qup: Fix QUP version identify method"
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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

---
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Next message: Srinivas Pandruvada: "Re: [PATCH] cpufreq: intel_pstate: Fix cpuinfo_cur_freq after performance governor changes"
Previous message: Paul E. McKenney: "Re: RCU stall warnings..."
In reply to: Varadarajan Narayanan: "[PATCH v5 14/14] spi: qup: Fix QUP version identify method"
Next in thread: Varadarajan Narayanan: "[PATCH v5 12/14] spi: qup: allow multiple DMA transactions per spi xfer"
Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]