Hi zelong, kernel test robot noticed the following build warnings: https://git-scm.com/docs/git-format-patch#_base_tree_information] url: https://github.com/intel-lab-lkp/linux/commits/zelong-dong/media-rc-meson-ir-support-MMIO-regmaps-to-access-registers/20230511-114604 base: 457391b0380335d5e9a5babdec90ac53928b23b4 patch link: https://lore.kernel.org/r/20230511034333.26800-1-zelong.dong%40amlogic.com patch subject: [PATCH] media: rc: meson-ir: support MMIO regmaps to access registers config: parisc-randconfig-m041-20230509 (https://download.01.org/0day-ci/archive/20230512/202305122010.lGsFA089-lkp@xxxxxxxxx/config) compiler: hppa-linux-gcc (GCC) 12.1.0 If you fix the issue, kindly add following tag where applicable | Reported-by: kernel test robot <lkp@xxxxxxxxx> | Reported-by: Dan Carpenter <error27@xxxxxxxxx> | Link: https://lore.kernel.org/r/202305122010.lGsFA089-lkp@xxxxxxxxx/ New smatch warnings: drivers/media/rc/meson-ir.c:111 meson_ir_probe() warn: passing zero to 'PTR_ERR' Old smatch warnings: drivers/media/rc/meson-ir.c:113 meson_ir_probe() warn: passing zero to 'PTR_ERR' vim +/PTR_ERR +111 drivers/media/rc/meson-ir.c 12ddbadf383d55 Beniamino Galvani 2014-11-18 95 static int meson_ir_probe(struct platform_device *pdev) 12ddbadf383d55 Beniamino Galvani 2014-11-18 96 { 12ddbadf383d55 Beniamino Galvani 2014-11-18 97 struct device *dev = &pdev->dev; 12ddbadf383d55 Beniamino Galvani 2014-11-18 98 struct device_node *node = dev->of_node; 5a048b4c2c04b7 Zelong Dong 2023-05-11 99 struct resource *res; 5a048b4c2c04b7 Zelong Dong 2023-05-11 100 void __iomem *res_start; 12ddbadf383d55 Beniamino Galvani 2014-11-18 101 const char *map_name; 12ddbadf383d55 Beniamino Galvani 2014-11-18 102 struct meson_ir *ir; 1ffc931c320a8a Heiner Kallweit 2017-04-12 103 int irq, ret; 12ddbadf383d55 Beniamino Galvani 2014-11-18 104 12ddbadf383d55 Beniamino Galvani 2014-11-18 105 ir = devm_kzalloc(dev, sizeof(struct meson_ir), GFP_KERNEL); 12ddbadf383d55 Beniamino Galvani 2014-11-18 106 if (!ir) 12ddbadf383d55 Beniamino Galvani 2014-11-18 107 return -ENOMEM; 12ddbadf383d55 Beniamino Galvani 2014-11-18 108 5a048b4c2c04b7 Zelong Dong 2023-05-11 109 res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 5a048b4c2c04b7 Zelong Dong 2023-05-11 110 if (IS_ERR_OR_NULL(res)) { 5a048b4c2c04b7 Zelong Dong 2023-05-11 @111 dev_err(&pdev->dev, "get mem resource error, %ld\n", 5a048b4c2c04b7 Zelong Dong 2023-05-11 112 PTR_ERR(res)); 5a048b4c2c04b7 Zelong Dong 2023-05-11 113 return PTR_ERR(res); The platform_get_resource() function returns NULL on failure. It never returns error pointers. This means that return PTR_ERR(res); returns 0 (which means success). Please read my blog for more information. https://staticthinking.wordpress.com/2022/08/01/mixing-error-pointers-and-null/ This should be: res = platform_get_resource(pdev, IORESOURCE_MEM, 0); if (!res) { dev_err(&pdev->dev, "get mem resource error\n"); return -EINVAL; } 5a048b4c2c04b7 Zelong Dong 2023-05-11 114 } 5a048b4c2c04b7 Zelong Dong 2023-05-11 115 5a048b4c2c04b7 Zelong Dong 2023-05-11 116 res_start = devm_ioremap_resource(&pdev->dev, res); 5a048b4c2c04b7 Zelong Dong 2023-05-11 117 meson_ir_regmap_config.max_register = resource_size(res) - 4; 5a048b4c2c04b7 Zelong Dong 2023-05-11 118 ir->reg = devm_regmap_init_mmio(&pdev->dev, res_start, 5a048b4c2c04b7 Zelong Dong 2023-05-11 119 &meson_ir_regmap_config); 9e2e4382ec72d9 Ding Xiang 2019-06-18 120 if (IS_ERR(ir->reg)) 12ddbadf383d55 Beniamino Galvani 2014-11-18 121 return PTR_ERR(ir->reg); 12ddbadf383d55 Beniamino Galvani 2014-11-18 122 1ffc931c320a8a Heiner Kallweit 2017-04-12 123 irq = platform_get_irq(pdev, 0); 97299a3035328d Stephen Boyd 2019-07-30 124 if (irq < 0) 1ffc931c320a8a Heiner Kallweit 2017-04-12 125 return irq; 12ddbadf383d55 Beniamino Galvani 2014-11-18 126 705aa578d408f6 Heiner Kallweit 2017-04-12 127 ir->rc = devm_rc_allocate_device(dev, RC_DRIVER_IR_RAW); 12ddbadf383d55 Beniamino Galvani 2014-11-18 128 if (!ir->rc) { 12ddbadf383d55 Beniamino Galvani 2014-11-18 129 dev_err(dev, "failed to allocate rc device\n"); 12ddbadf383d55 Beniamino Galvani 2014-11-18 130 return -ENOMEM; 12ddbadf383d55 Beniamino Galvani 2014-11-18 131 } 12ddbadf383d55 Beniamino Galvani 2014-11-18 132 12ddbadf383d55 Beniamino Galvani 2014-11-18 133 ir->rc->priv = ir; 518f4b26be1ebf Sean Young 2017-07-01 134 ir->rc->device_name = DRIVER_NAME; 12ddbadf383d55 Beniamino Galvani 2014-11-18 135 ir->rc->input_phys = DRIVER_NAME "/input0"; 12ddbadf383d55 Beniamino Galvani 2014-11-18 136 ir->rc->input_id.bustype = BUS_HOST; 12ddbadf383d55 Beniamino Galvani 2014-11-18 137 map_name = of_get_property(node, "linux,rc-map-name", NULL); 12ddbadf383d55 Beniamino Galvani 2014-11-18 138 ir->rc->map_name = map_name ? map_name : RC_MAP_EMPTY; 6d741bfed5ed06 Sean Young 2017-08-07 139 ir->rc->allowed_protocols = RC_PROTO_BIT_ALL_IR_DECODER; 5a048b4c2c04b7 Zelong Dong 2023-05-11 140 ir->rc->rx_resolution = MESON_RAW_TRATE; b358e747aebc4a Sean Young 2018-03-12 141 ir->rc->min_timeout = 1; b358e747aebc4a Sean Young 2018-03-12 142 ir->rc->timeout = IR_DEFAULT_TIMEOUT; b358e747aebc4a Sean Young 2018-03-12 143 ir->rc->max_timeout = 10 * IR_DEFAULT_TIMEOUT; 12ddbadf383d55 Beniamino Galvani 2014-11-18 144 ir->rc->driver_name = DRIVER_NAME; 12ddbadf383d55 Beniamino Galvani 2014-11-18 145 12ddbadf383d55 Beniamino Galvani 2014-11-18 146 spin_lock_init(&ir->lock); 12ddbadf383d55 Beniamino Galvani 2014-11-18 147 platform_set_drvdata(pdev, ir); 12ddbadf383d55 Beniamino Galvani 2014-11-18 148 705aa578d408f6 Heiner Kallweit 2017-04-12 149 ret = devm_rc_register_device(dev, ir->rc); 12ddbadf383d55 Beniamino Galvani 2014-11-18 150 if (ret) { 12ddbadf383d55 Beniamino Galvani 2014-11-18 151 dev_err(dev, "failed to register rc device\n"); 705aa578d408f6 Heiner Kallweit 2017-04-12 152 return ret; 12ddbadf383d55 Beniamino Galvani 2014-11-18 153 } 12ddbadf383d55 Beniamino Galvani 2014-11-18 154 611ee552a538b0 Heiner Kallweit 2017-04-12 155 ret = devm_request_irq(dev, irq, meson_ir_irq, 0, NULL, ir); 12ddbadf383d55 Beniamino Galvani 2014-11-18 156 if (ret) { 12ddbadf383d55 Beniamino Galvani 2014-11-18 157 dev_err(dev, "failed to request irq\n"); 705aa578d408f6 Heiner Kallweit 2017-04-12 158 return ret; 12ddbadf383d55 Beniamino Galvani 2014-11-18 159 } 12ddbadf383d55 Beniamino Galvani 2014-11-18 160 12ddbadf383d55 Beniamino Galvani 2014-11-18 161 /* Reset the decoder */ 5a048b4c2c04b7 Zelong Dong 2023-05-11 162 regmap_update_bits(ir->reg, IR_DEC_REG1, IR_DEC_REG1_RESET, 5a048b4c2c04b7 Zelong Dong 2023-05-11 163 IR_DEC_REG1_RESET); 5a048b4c2c04b7 Zelong Dong 2023-05-11 164 regmap_update_bits(ir->reg, IR_DEC_REG1, IR_DEC_REG1_RESET, 0); 6edf27ee258925 Neil Armstrong 2016-08-20 165 6edf27ee258925 Neil Armstrong 2016-08-20 166 /* Set general operation mode (= raw/software decoding) */ 6edf27ee258925 Neil Armstrong 2016-08-20 167 if (of_device_is_compatible(node, "amlogic,meson6-ir")) 5a048b4c2c04b7 Zelong Dong 2023-05-11 168 regmap_update_bits(ir->reg, IR_DEC_REG1, IR_DEC_REG1_MODE, 5a048b4c2c04b7 Zelong Dong 2023-05-11 169 FIELD_PREP(IR_DEC_REG1_MODE, DEC_MODE_RAW)); 6edf27ee258925 Neil Armstrong 2016-08-20 170 else 5a048b4c2c04b7 Zelong Dong 2023-05-11 171 regmap_update_bits(ir->reg, IR_DEC_REG2, IR_DEC_REG2_MODE, 5a048b4c2c04b7 Zelong Dong 2023-05-11 172 FIELD_PREP(IR_DEC_REG2_MODE, DEC_MODE_RAW)); 6edf27ee258925 Neil Armstrong 2016-08-20 173 12ddbadf383d55 Beniamino Galvani 2014-11-18 174 /* Set rate */ 5a048b4c2c04b7 Zelong Dong 2023-05-11 175 regmap_update_bits(ir->reg, IR_DEC_REG0, IR_DEC_REG0_BASE_TIME, 5a048b4c2c04b7 Zelong Dong 2023-05-11 176 FIELD_PREP(IR_DEC_REG0_BASE_TIME, 5a048b4c2c04b7 Zelong Dong 2023-05-11 177 MESON_RAW_TRATE - 1)); 12ddbadf383d55 Beniamino Galvani 2014-11-18 178 /* IRQ on rising and falling edges */ 5a048b4c2c04b7 Zelong Dong 2023-05-11 179 regmap_update_bits(ir->reg, IR_DEC_REG1, IR_DEC_REG1_IRQSEL, 5a048b4c2c04b7 Zelong Dong 2023-05-11 180 FIELD_PREP(IR_DEC_REG1_IRQSEL, IRQSEL_RISE_FALL)); 12ddbadf383d55 Beniamino Galvani 2014-11-18 181 /* Enable the decoder */ 5a048b4c2c04b7 Zelong Dong 2023-05-11 182 regmap_update_bits(ir->reg, IR_DEC_REG1, IR_DEC_REG1_ENABLE, 5a048b4c2c04b7 Zelong Dong 2023-05-11 183 IR_DEC_REG1_ENABLE); 12ddbadf383d55 Beniamino Galvani 2014-11-18 184 12ddbadf383d55 Beniamino Galvani 2014-11-18 185 dev_info(dev, "receiver initialized\n"); 12ddbadf383d55 Beniamino Galvani 2014-11-18 186 12ddbadf383d55 Beniamino Galvani 2014-11-18 187 return 0; 12ddbadf383d55 Beniamino Galvani 2014-11-18 188 } -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests
