Merge be42a09fe8 ("bpf: Send signals asynchronously if !preemptible") into android14-6.1-lts

Steps on the way to 6.1.129

Change-Id: Ibd1adb3cc93660336fe0bd65b91d65f4ca1e0fcb
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>

drivers/pinctrl/stm32/pinctrl-stm32.c

@@ -85,7 +85,6 @@ struct stm32_pinctrl_group {
 
 struct stm32_gpio_bank {
 	void __iomem *base;
-	struct clk *clk;
 	struct reset_control *rstc;
 	spinlock_t lock;
 	struct gpio_chip gpio_chip;
@@ -107,6 +106,7 @@ struct stm32_pinctrl {
 	unsigned ngroups;
 	const char **grp_names;
 	struct stm32_gpio_bank *banks;
+	struct clk_bulk_data *clks;
 	unsigned nbanks;
 	const struct stm32_pinctrl_match_data *match_data;
 	struct irq_domain	*domain;
@@ -1273,6 +1273,28 @@ static const struct pinconf_ops stm32_pconf_ops = {
 	.pin_config_dbg_show	= stm32_pconf_dbg_show,
 };
 
+static struct stm32_desc_pin *stm32_pctrl_get_desc_pin_from_gpio(struct stm32_pinctrl *pctl,
+								 struct stm32_gpio_bank *bank,
+								 unsigned int offset)
+{
+	unsigned int stm32_pin_nb = bank->bank_nr * STM32_GPIO_PINS_PER_BANK + offset;
+	struct stm32_desc_pin *pin_desc;
+	int i;
+
+	/* With few exceptions (e.g. bank 'Z'), pin number matches with pin index in array */
+	pin_desc = pctl->pins + stm32_pin_nb;
+	if (pin_desc->pin.number == stm32_pin_nb)
+		return pin_desc;
+
+	/* Otherwise, loop all array to find the pin with the right number */
+	for (i = 0; i < pctl->npins; i++) {
+		pin_desc = pctl->pins + i;
+		if (pin_desc->pin.number == stm32_pin_nb)
+			return pin_desc;
+	}
+	return NULL;
+}
+
 static int stm32_gpiolib_register_bank(struct stm32_pinctrl *pctl, struct fwnode_handle *fwnode)
 {
 	struct stm32_gpio_bank *bank = &pctl->banks[pctl->nbanks];
@@ -1283,6 +1305,8 @@ static int stm32_gpiolib_register_bank(struct stm32_pinctrl *pctl, struct fwnode
 	struct resource res;
 	int npins = STM32_GPIO_PINS_PER_BANK;
 	int bank_nr, err, i = 0;
+	struct stm32_desc_pin *stm32_pin;
+	char **names;
 
 	if (!IS_ERR(bank->rstc))
 		reset_control_deassert(bank->rstc);
@@ -1294,12 +1318,6 @@ static int stm32_gpiolib_register_bank(struct stm32_pinctrl *pctl, struct fwnode
 	if (IS_ERR(bank->base))
 		return PTR_ERR(bank->base);
 
-	err = clk_prepare_enable(bank->clk);
-	if (err) {
-		dev_err(dev, "failed to prepare_enable clk (%d)\n", err);
-		return err;
-	}
-
 	bank->gpio_chip = stm32_gpio_template;
 
 	fwnode_property_read_string(fwnode, "st,bank-name", &bank->gpio_chip.label);
@@ -1346,24 +1364,35 @@ static int stm32_gpiolib_register_bank(struct stm32_pinctrl *pctl, struct fwnode
 							   bank->fwnode, &stm32_gpio_domain_ops,
 							   bank);
 
-		if (!bank->domain) {
-			err = -ENODEV;
-			goto err_clk;
+		if (!bank->domain)
+			return -ENODEV;
+	}
+
+	names = devm_kcalloc(dev, npins, sizeof(char *), GFP_KERNEL);
+	if (!names)
+		return -ENOMEM;
+
+	for (i = 0; i < npins; i++) {
+		stm32_pin = stm32_pctrl_get_desc_pin_from_gpio(pctl, bank, i);
+		if (stm32_pin && stm32_pin->pin.name) {
+			names[i] = devm_kasprintf(dev, GFP_KERNEL, "%s", stm32_pin->pin.name);
+			if (!names[i])
+				return -ENOMEM;
+		} else {
+			names[i] = NULL;
 		}
 	}
 
+	bank->gpio_chip.names = (const char * const *)names;
+
 	err = gpiochip_add_data(&bank->gpio_chip, bank);
 	if (err) {
 		dev_err(dev, "Failed to add gpiochip(%d)!\n", bank_nr);
-		goto err_clk;
+		return err;
 	}
 
 	dev_info(dev, "%s bank added\n", bank->gpio_chip.label);
 	return 0;
-
-err_clk:
-	clk_disable_unprepare(bank->clk);
-	return err;
 }
 
 static struct irq_domain *stm32_pctrl_get_irq_domain(struct platform_device *pdev)
@@ -1591,6 +1620,11 @@ int stm32_pctl_probe(struct platform_device *pdev)
 	if (!pctl->banks)
 		return -ENOMEM;
 
+	pctl->clks = devm_kcalloc(dev, banks, sizeof(*pctl->clks),
+				  GFP_KERNEL);
+	if (!pctl->clks)
+		return -ENOMEM;
+
 	i = 0;
 	for_each_gpiochip_node(dev, child) {
 		struct stm32_gpio_bank *bank = &pctl->banks[i];
@@ -1602,24 +1636,27 @@ int stm32_pctl_probe(struct platform_device *pdev)
 			return -EPROBE_DEFER;
 		}
 
-		bank->clk = of_clk_get_by_name(np, NULL);
-		if (IS_ERR(bank->clk)) {
+		pctl->clks[i].clk = of_clk_get_by_name(np, NULL);
+		if (IS_ERR(pctl->clks[i].clk)) {
 			fwnode_handle_put(child);
-			return dev_err_probe(dev, PTR_ERR(bank->clk),
+			return dev_err_probe(dev, PTR_ERR(pctl->clks[i].clk),
 					     "failed to get clk\n");
 		}
+		pctl->clks[i].id = "pctl";
 		i++;
 	}
 
+	ret = clk_bulk_prepare_enable(banks, pctl->clks);
+	if (ret) {
+		dev_err(dev, "failed to prepare_enable clk (%d)\n", ret);
+		return ret;
+	}
+
 	for_each_gpiochip_node(dev, child) {
 		ret = stm32_gpiolib_register_bank(pctl, child);
 		if (ret) {
 			fwnode_handle_put(child);
-
-			for (i = 0; i < pctl->nbanks; i++)
-				clk_disable_unprepare(pctl->banks[i].clk);
-
-			return ret;
+			goto err_register;
 		}
 
 		pctl->nbanks++;
@@ -1628,6 +1665,15 @@ int stm32_pctl_probe(struct platform_device *pdev)
 	dev_info(dev, "Pinctrl STM32 initialized\n");
 
 	return 0;
+err_register:
+	for (i = 0; i < pctl->nbanks; i++) {
+		struct stm32_gpio_bank *bank = &pctl->banks[i];
+
+		gpiochip_remove(&bank->gpio_chip);
+	}
+
+	clk_bulk_disable_unprepare(banks, pctl->clks);
+	return ret;
 }
 
 static int __maybe_unused stm32_pinctrl_restore_gpio_regs(
@@ -1696,10 +1742,8 @@ static int __maybe_unused stm32_pinctrl_restore_gpio_regs(
 int __maybe_unused stm32_pinctrl_suspend(struct device *dev)
 {
 	struct stm32_pinctrl *pctl = dev_get_drvdata(dev);
-	int i;
 
-	for (i = 0; i < pctl->nbanks; i++)
-		clk_disable(pctl->banks[i].clk);
+	clk_bulk_disable(pctl->nbanks, pctl->clks);
 
 	return 0;
 }
@@ -1708,10 +1752,11 @@ int __maybe_unused stm32_pinctrl_resume(struct device *dev)
 {
 	struct stm32_pinctrl *pctl = dev_get_drvdata(dev);
 	struct stm32_pinctrl_group *g = pctl->groups;
-	int i;
+	int i, ret;
 
-	for (i = 0; i < pctl->nbanks; i++)
-		clk_enable(pctl->banks[i].clk);
+	ret = clk_bulk_enable(pctl->nbanks, pctl->clks);
+	if (ret)
+		return ret;
 
 	for (i = 0; i < pctl->ngroups; i++, g++)
 		stm32_pinctrl_restore_gpio_regs(pctl, g->pin);

kernel/trace/bpf_trace.c

@@ -857,7 +857,7 @@ static int bpf_send_signal_common(u32 sig, enum pid_type type)
 	if (unlikely(is_global_init(current)))
 		return -EPERM;
 
-	if (irqs_disabled()) {
+	if (!preemptible()) {
 		/* Do an early check on signal validity. Otherwise,
 		 * the error is lost in deferred irq_work.
 		 */