diff options
| -rw-r--r-- | drivers/pinctrl/core.c | 16 | ||||
| -rw-r--r-- | drivers/pinctrl/qcom/pinctrl-lpass-lpi.c | 17 |
2 files changed, 18 insertions, 15 deletions
diff --git a/drivers/pinctrl/core.c b/drivers/pinctrl/core.c index e2f7519bef04..e9dc9638120a 100644 --- a/drivers/pinctrl/core.c +++ b/drivers/pinctrl/core.c @@ -1022,20 +1022,17 @@ static int add_setting(struct pinctrl *p, struct pinctrl_dev *pctldev, static struct pinctrl *find_pinctrl(struct device *dev) { - struct pinctrl *entry, *p = NULL; + struct pinctrl *p; mutex_lock(&pinctrl_list_mutex); - - list_for_each_entry(entry, &pinctrl_list, node) { - if (entry->dev == dev) { - p = entry; - kref_get(&p->users); - break; + list_for_each_entry(p, &pinctrl_list, node) + if (p->dev == dev) { + mutex_unlock(&pinctrl_list_mutex); + return p; } - } mutex_unlock(&pinctrl_list_mutex); - return p; + return NULL; } static void pinctrl_free(struct pinctrl *p, bool inlist); @@ -1143,6 +1140,7 @@ struct pinctrl *pinctrl_get(struct device *dev) p = find_pinctrl(dev); if (p) { dev_dbg(dev, "obtain a copy of previously claimed pinctrl\n"); + kref_get(&p->users); return p; } diff --git a/drivers/pinctrl/qcom/pinctrl-lpass-lpi.c b/drivers/pinctrl/qcom/pinctrl-lpass-lpi.c index e5a418026ba3..0b2839d27fd6 100644 --- a/drivers/pinctrl/qcom/pinctrl-lpass-lpi.c +++ b/drivers/pinctrl/qcom/pinctrl-lpass-lpi.c @@ -32,7 +32,8 @@ struct lpi_pinctrl { char __iomem *tlmm_base; char __iomem *slew_base; struct clk_bulk_data clks[MAX_LPI_NUM_CLKS]; - struct mutex slew_access_lock; + /* Protects from concurrent register updates */ + struct mutex lock; DECLARE_BITMAP(ever_gpio, MAX_NR_GPIO); const struct lpi_pinctrl_variant_data *data; }; @@ -103,6 +104,7 @@ static int lpi_gpio_set_mux(struct pinctrl_dev *pctldev, unsigned int function, if (WARN_ON(i == g->nfuncs)) return -EINVAL; + mutex_lock(&pctrl->lock); val = lpi_gpio_read(pctrl, pin, LPI_GPIO_CFG_REG); /* @@ -128,6 +130,7 @@ static int lpi_gpio_set_mux(struct pinctrl_dev *pctldev, unsigned int function, u32p_replace_bits(&val, i, LPI_GPIO_FUNCTION_MASK); lpi_gpio_write(pctrl, pin, LPI_GPIO_CFG_REG, val); + mutex_unlock(&pctrl->lock); return 0; } @@ -233,14 +236,14 @@ static int lpi_config_set(struct pinctrl_dev *pctldev, unsigned int group, if (slew_offset == LPI_NO_SLEW) break; - mutex_lock(&pctrl->slew_access_lock); + mutex_lock(&pctrl->lock); sval = ioread32(pctrl->slew_base + LPI_SLEW_RATE_CTL_REG); sval &= ~(LPI_SLEW_RATE_MASK << slew_offset); sval |= arg << slew_offset; iowrite32(sval, pctrl->slew_base + LPI_SLEW_RATE_CTL_REG); - mutex_unlock(&pctrl->slew_access_lock); + mutex_unlock(&pctrl->lock); break; default: return -EINVAL; @@ -256,6 +259,7 @@ static int lpi_config_set(struct pinctrl_dev *pctldev, unsigned int group, lpi_gpio_write(pctrl, group, LPI_GPIO_VALUE_REG, val); } + mutex_lock(&pctrl->lock); val = lpi_gpio_read(pctrl, group, LPI_GPIO_CFG_REG); u32p_replace_bits(&val, pullup, LPI_GPIO_PULL_MASK); @@ -264,6 +268,7 @@ static int lpi_config_set(struct pinctrl_dev *pctldev, unsigned int group, u32p_replace_bits(&val, output_enabled, LPI_GPIO_OE_MASK); lpi_gpio_write(pctrl, group, LPI_GPIO_CFG_REG, val); + mutex_unlock(&pctrl->lock); return 0; } @@ -461,7 +466,7 @@ int lpi_pinctrl_probe(struct platform_device *pdev) pctrl->chip.label = dev_name(dev); pctrl->chip.can_sleep = false; - mutex_init(&pctrl->slew_access_lock); + mutex_init(&pctrl->lock); pctrl->ctrl = devm_pinctrl_register(dev, &pctrl->desc, pctrl); if (IS_ERR(pctrl->ctrl)) { @@ -483,7 +488,7 @@ int lpi_pinctrl_probe(struct platform_device *pdev) return 0; err_pinctrl: - mutex_destroy(&pctrl->slew_access_lock); + mutex_destroy(&pctrl->lock); clk_bulk_disable_unprepare(MAX_LPI_NUM_CLKS, pctrl->clks); return ret; @@ -495,7 +500,7 @@ int lpi_pinctrl_remove(struct platform_device *pdev) struct lpi_pinctrl *pctrl = platform_get_drvdata(pdev); int i; - mutex_destroy(&pctrl->slew_access_lock); + mutex_destroy(&pctrl->lock); clk_bulk_disable_unprepare(MAX_LPI_NUM_CLKS, pctrl->clks); for (i = 0; i < pctrl->data->npins; i++) |