5.4-stable review patch. If anyone has any objections, please let me know. ------------------ From: Peter Ujfalusi <peter.ujfalusi@xxxxxx> [ Upstream commit 1125d925990b8d8166c45396c9281e2a705c97f8 ] Replace the davinci_mcasp_set_pdata_from_of() function which returned a pdata pointer with davinci_mcasp_get_config() to return an actual error code and handle all pdata validation and private mcasp struct setup in there. Drop the unused ram-size-playback and sram-size-capture query from DT at the same time. Signed-off-by: Peter Ujfalusi <peter.ujfalusi@xxxxxx> Link: https://lore.kernel.org/r/20201106072551.689-4-peter.ujfalusi@xxxxxx Signed-off-by: Mark Brown <broonie@xxxxxxxxxx> Stable-dep-of: d18ca8635db2 ("ASoC: ti: davinci-mcasp: Fix race condition during probe") Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> --- sound/soc/ti/davinci-mcasp.c | 164 +++++++++++++---------------------- 1 file changed, 60 insertions(+), 104 deletions(-) diff --git a/sound/soc/ti/davinci-mcasp.c b/sound/soc/ti/davinci-mcasp.c index e2e272d653480..637c26cad2e6e 100644 --- a/sound/soc/ti/davinci-mcasp.c +++ b/sound/soc/ti/davinci-mcasp.c @@ -75,6 +75,7 @@ struct davinci_mcasp_ruledata { struct davinci_mcasp { struct snd_dmaengine_dai_dma_data dma_data[2]; + struct davinci_mcasp_pdata *pdata; void __iomem *base; u32 fifo_base; struct device *dev; @@ -1722,44 +1723,37 @@ static int mcasp_reparent_fck(struct platform_device *pdev) return ret; } -static struct davinci_mcasp_pdata *davinci_mcasp_set_pdata_from_of( - struct platform_device *pdev) +static int davinci_mcasp_get_config(struct davinci_mcasp *mcasp, + struct platform_device *pdev) { + const struct of_device_id *match = of_match_device(mcasp_dt_ids, &pdev->dev); struct device_node *np = pdev->dev.of_node; struct davinci_mcasp_pdata *pdata = NULL; - const struct of_device_id *match = - of_match_device(mcasp_dt_ids, &pdev->dev); - const u32 *of_serial_dir32; u32 val; - int i, ret = 0; + int i; if (pdev->dev.platform_data) { pdata = pdev->dev.platform_data; pdata->dismod = DISMOD_LOW; - return pdata; + goto out; } else if (match) { pdata = devm_kmemdup(&pdev->dev, match->data, sizeof(*pdata), GFP_KERNEL); if (!pdata) - return NULL; + return -ENOMEM; } else { - /* control shouldn't reach here. something is wrong */ - ret = -EINVAL; - goto nodata; + dev_err(&pdev->dev, "No compatible match found\n"); + return -EINVAL; } - ret = of_property_read_u32(np, "op-mode", &val); - if (ret >= 0) + if (of_property_read_u32(np, "op-mode", &val) == 0) pdata->op_mode = val; - ret = of_property_read_u32(np, "tdm-slots", &val); - if (ret >= 0) { + if (of_property_read_u32(np, "tdm-slots", &val) == 0) { if (val < 2 || val > 32) { - dev_err(&pdev->dev, - "tdm-slots must be in rage [2-32]\n"); - ret = -EINVAL; - goto nodata; + dev_err(&pdev->dev, "tdm-slots must be in rage [2-32]\n"); + return -EINVAL; } pdata->tdm_slots = val; @@ -1771,10 +1765,8 @@ static struct davinci_mcasp_pdata *davinci_mcasp_set_pdata_from_of( u8 *of_serial_dir = devm_kzalloc(&pdev->dev, (sizeof(*of_serial_dir) * val), GFP_KERNEL); - if (!of_serial_dir) { - ret = -ENOMEM; - goto nodata; - } + if (!of_serial_dir) + return -ENOMEM; for (i = 0; i < val; i++) of_serial_dir[i] = be32_to_cpup(&of_serial_dir32[i]); @@ -1783,24 +1775,16 @@ static struct davinci_mcasp_pdata *davinci_mcasp_set_pdata_from_of( pdata->serial_dir = of_serial_dir; } - ret = of_property_read_u32(np, "tx-num-evt", &val); - if (ret >= 0) + if (of_property_read_u32(np, "tx-num-evt", &val) == 0) pdata->txnumevt = val; - ret = of_property_read_u32(np, "rx-num-evt", &val); - if (ret >= 0) + if (of_property_read_u32(np, "rx-num-evt", &val) == 0) pdata->rxnumevt = val; - ret = of_property_read_u32(np, "sram-size-playback", &val); - if (ret >= 0) - pdata->sram_size_playback = val; - - ret = of_property_read_u32(np, "sram-size-capture", &val); - if (ret >= 0) - pdata->sram_size_capture = val; + if (of_property_read_u32(np, "auxclk-fs-ratio", &val) == 0) + mcasp->auxclk_fs_ratio = val; - ret = of_property_read_u32(np, "dismod", &val); - if (ret >= 0) { + if (of_property_read_u32(np, "dismod", &val) == 0) { if (val == 0 || val == 2 || val == 3) { pdata->dismod = DISMOD_VAL(val); } else { @@ -1811,15 +1795,40 @@ static struct davinci_mcasp_pdata *davinci_mcasp_set_pdata_from_of( pdata->dismod = DISMOD_LOW; } - return pdata; +out: + mcasp->pdata = pdata; -nodata: - if (ret < 0) { - dev_err(&pdev->dev, "Error populating platform data, err %d\n", - ret); - pdata = NULL; + mcasp->op_mode = pdata->op_mode; + /* sanity check for tdm slots parameter */ + if (mcasp->op_mode == DAVINCI_MCASP_IIS_MODE) { + if (pdata->tdm_slots < 2) { + dev_warn(&pdev->dev, "invalid tdm slots: %d\n", + pdata->tdm_slots); + mcasp->tdm_slots = 2; + } else if (pdata->tdm_slots > 32) { + dev_warn(&pdev->dev, "invalid tdm slots: %d\n", + pdata->tdm_slots); + mcasp->tdm_slots = 32; + } else { + mcasp->tdm_slots = pdata->tdm_slots; + } } - return pdata; + + mcasp->num_serializer = pdata->num_serializer; +#ifdef CONFIG_PM + mcasp->context.xrsr_regs = devm_kcalloc(&pdev->dev, + mcasp->num_serializer, sizeof(u32), + GFP_KERNEL); + if (!mcasp->context.xrsr_regs) + return -ENOMEM; +#endif + mcasp->serial_dir = pdata->serial_dir; + mcasp->version = pdata->version; + mcasp->txnumevt = pdata->txnumevt; + mcasp->rxnumevt = pdata->rxnumevt; + mcasp->dismod = pdata->dismod; + + return 0; } enum { @@ -2055,25 +2064,10 @@ static inline int davinci_mcasp_init_gpiochip(struct davinci_mcasp *mcasp) } #endif /* CONFIG_GPIOLIB */ -static void davinci_mcasp_get_dt_params(struct davinci_mcasp *mcasp) -{ - struct device_node *np = mcasp->dev->of_node; - int ret; - u32 val; - - if (!np) - return; - - ret = of_property_read_u32(np, "auxclk-fs-ratio", &val); - if (ret >= 0) - mcasp->auxclk_fs_ratio = val; -} - static int davinci_mcasp_probe(struct platform_device *pdev) { struct snd_dmaengine_dai_dma_data *dma_data; struct resource *mem, *dat; - struct davinci_mcasp_pdata *pdata; struct davinci_mcasp *mcasp; char *irq_name; int irq; @@ -2089,11 +2083,10 @@ static int davinci_mcasp_probe(struct platform_device *pdev) if (!mcasp) return -ENOMEM; - pdata = davinci_mcasp_set_pdata_from_of(pdev); - if (!pdata) { - dev_err(&pdev->dev, "no platform data\n"); - return -EINVAL; - } + mcasp->dev = &pdev->dev; + ret = davinci_mcasp_get_config(mcasp, pdev); + if (ret) + return ret; mem = platform_get_resource_byname(pdev, IORESOURCE_MEM, "mpu"); if (!mem) { @@ -2112,40 +2105,6 @@ static int davinci_mcasp_probe(struct platform_device *pdev) pm_runtime_enable(&pdev->dev); - mcasp->op_mode = pdata->op_mode; - /* sanity check for tdm slots parameter */ - if (mcasp->op_mode == DAVINCI_MCASP_IIS_MODE) { - if (pdata->tdm_slots < 2) { - dev_err(&pdev->dev, "invalid tdm slots: %d\n", - pdata->tdm_slots); - mcasp->tdm_slots = 2; - } else if (pdata->tdm_slots > 32) { - dev_err(&pdev->dev, "invalid tdm slots: %d\n", - pdata->tdm_slots); - mcasp->tdm_slots = 32; - } else { - mcasp->tdm_slots = pdata->tdm_slots; - } - } - - mcasp->num_serializer = pdata->num_serializer; -#ifdef CONFIG_PM - mcasp->context.xrsr_regs = devm_kcalloc(&pdev->dev, - mcasp->num_serializer, sizeof(u32), - GFP_KERNEL); - if (!mcasp->context.xrsr_regs) { - ret = -ENOMEM; - goto err; - } -#endif - mcasp->serial_dir = pdata->serial_dir; - mcasp->version = pdata->version; - mcasp->txnumevt = pdata->txnumevt; - mcasp->rxnumevt = pdata->rxnumevt; - mcasp->dismod = pdata->dismod; - - mcasp->dev = &pdev->dev; - irq = platform_get_irq_byname_optional(pdev, "common"); if (irq > 0) { irq_name = devm_kasprintf(&pdev->dev, GFP_KERNEL, "%s_common", @@ -2214,7 +2173,7 @@ static int davinci_mcasp_probe(struct platform_device *pdev) if (dat) dma_data->addr = dat->start; else - dma_data->addr = mem->start + davinci_mcasp_txdma_offset(pdata); + dma_data->addr = mem->start + davinci_mcasp_txdma_offset(mcasp->pdata); /* RX is not valid in DIT mode */ @@ -2225,7 +2184,7 @@ static int davinci_mcasp_probe(struct platform_device *pdev) dma_data->addr = dat->start; else dma_data->addr = - mem->start + davinci_mcasp_rxdma_offset(pdata); + mem->start + davinci_mcasp_rxdma_offset(mcasp->pdata); } if (mcasp->version < MCASP_VERSION_3) { @@ -2278,11 +2237,8 @@ static int davinci_mcasp_probe(struct platform_device *pdev) if (ret) goto err; - davinci_mcasp_get_dt_params(mcasp); - - ret = devm_snd_soc_register_component(&pdev->dev, - &davinci_mcasp_component, - &davinci_mcasp_dai[pdata->op_mode], 1); + ret = devm_snd_soc_register_component(&pdev->dev, &davinci_mcasp_component, + &davinci_mcasp_dai[mcasp->op_mode], 1); if (ret != 0) goto err; -- 2.43.0
