Hi Thomas,
On 09/02/2016 09:10 PM, Thomas Gleixner wrote:
On Fri, 2 Sep 2016, Alexandre TORGUE wrote:
+static int stm32_gpio_domain_translate(struct irq_domain *d,
+ struct irq_fwspec *fwspec,
+ unsigned long *hwirq,
+ unsigned int *type)
+{
+ if ((fwspec->param_count != 2) ||
+ (fwspec->param[0] >= STM32_GPIO_IRQ_LINE))
+ return -EINVAL;
Just a nitpick. This is unnecessarily hard to parse because you indented
the line break like a conditional statement
I agree. I will modify it as the one below.
+ if ((fwspec->param_count != 2) ||
+ (fwspec->param[0] >= STM32_GPIO_IRQ_LINE))
+ return -EINVAL;
Makes it immediately obvious that the second line belongs to the if.
+static void stm32_gpio_domain_activate(struct irq_domain *d,
+ struct irq_data *irq_data)
+{
+ struct stm32_gpio_bank *bank = d->host_data;
+ struct stm32_pinctrl *pctl = dev_get_drvdata(bank->gpio_chip.parent);
+
+ if (gpiochip_lock_as_irq(&bank->gpio_chip, irq_data->hwirq)) {
+ dev_err(pctl->dev,
+ "Unable to configure STM32 %s%ld as IRQ\n",
+ bank->gpio_chip.label, irq_data->hwirq);
+ return;
Hmm, that's nasty. When an interrupt is mapped then we don't expect the
activate function to fail. You really should lock that interrupt when it's
mapped.
Ok. I will remove it from here.
+ }
+ regmap_field_write(pctl->irqmux[irq_data->hwirq], bank->range.id);
+}
+static int stm32_gpio_domain_alloc(struct irq_domain *domain,
+ unsigned int virq,
+ unsigned int nr_irqs, void *data)
+{
+ struct irq_fwspec *fwspec = data;
+ struct irq_fwspec parent_fwspec;
+ struct stm32_pinctrl *pctl = domain->host_data;
+ irq_hw_number_t hwirq;
+ unsigned int i;
+
+ hwirq = fwspec->param[0];
+ for (i = 0; i < nr_irqs; i++)
+ irq_domain_set_hwirq_and_chip(domain, virq + i, hwirq + i,
+ &stm32_gpio_irq_chip, pctl);
+
+ parent_fwspec.fwnode = domain->parent->fwnode;
+ parent_fwspec.param_count = 2;
+ parent_fwspec.param[0] = fwspec->param[0];
+ parent_fwspec.param[1] = fwspec->param[1];
+
+ return irq_domain_alloc_irqs_parent(domain, virq, nr_irqs,
+ &parent_fwspec);
So doing it here would be probably the right thing to do:
ret = gpiochip_lock_as_irq();
if (ret)
return ret;
ret = irq_domain_alloc_irqs_parent(domain, virq, nr_irqs,
&parent_fwspec);
if (ret)
gpiochip_unlock_as_irq();
return ret;
So of course you need your own free() function which undoes that lock
thingy.
Ok thanks for proposal.
Best regards.
Alex
Thanks,
tglx
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