| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening PHC | |
|
Open Source and information security mailing list archives
| ||
|
Date: Thu, 2 Nov 2017 18:49:35 +0100
From: Thierry Reding <thierry.reding@...il.com>
To: Linus Walleij <linus.walleij@...aro.org>
Cc: Grygorii Strashko <grygorii.strashko@...com>,
Jonathan Hunter <jonathanh@...dia.com>,
linux-gpio@...r.kernel.org, linux-tegra@...r.kernel.org,
linux-kernel@...r.kernel.org
Subject: [PATCH v6 06/12] gpio: Move irq_chained_parent to struct gpio_irq_chip
From: Thierry Reding <treding@...dia.com>
In order to consolidate the multiple ways to associate an IRQ chip with
a GPIO chip, move more fields into the new struct gpio_irq_chip.
Signed-off-by: Thierry Reding <treding@...dia.com>
---
drivers/gpio/gpiolib.c | 17 ++++++++++++-----
include/linux/gpio/driver.h | 19 +++++++++++++++----
2 files changed, 27 insertions(+), 9 deletions(-)
diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c
index d3608cf511de..8eadae73ff20 100644
--- a/drivers/gpio/gpiolib.c
+++ b/drivers/gpio/gpiolib.c
@@ -1570,7 +1570,8 @@ static void gpiochip_set_cascaded_irqchip(struct gpio_chip *gpiochip,
irq_set_chained_handler_and_data(parent_irq, parent_handler,
gpiochip);
- gpiochip->irq_chained_parent = parent_irq;
+ gpiochip->irq.parents = &parent_irq;
+ gpiochip->irq.num_parents = 1;
}
/* Set the parent IRQ for all affected IRQs */
@@ -1719,17 +1720,23 @@ static int gpiochip_to_irq(struct gpio_chip *chip, unsigned offset)
*/
static void gpiochip_irqchip_remove(struct gpio_chip *gpiochip)
{
- unsigned int offset, irq;
+ unsigned int offset;
acpi_gpiochip_free_interrupts(gpiochip);
- if (gpiochip->irq_chained_parent) {
- irq_set_chained_handler_and_data(
- gpiochip->irq_chained_parent, NULL, NULL);
+ if (gpiochip->irq.num_parents > 0) {
+ struct gpio_irq_chip *irq = &gpiochip->irq;
+ unsigned int i;
+
+ for (i = 0; i < irq->num_parents; i++)
+ irq_set_chained_handler_and_data(irq->parents[i],
+ NULL, NULL);
}
/* Remove all IRQ mappings and delete the domain */
if (gpiochip->irq.domain) {
+ unsigned int irq;
+
for (offset = 0; offset < gpiochip->ngpio; offset++) {
if (!gpiochip_irqchip_irq_valid(gpiochip, offset))
continue;
diff --git a/include/linux/gpio/driver.h b/include/linux/gpio/driver.h
index 1367fa94105f..86f00d908e90 100644
--- a/include/linux/gpio/driver.h
+++ b/include/linux/gpio/driver.h
@@ -77,6 +77,21 @@ struct gpio_irq_chip {
* interrupt.
*/
void *parent_handler_data;
+
+ /**
+ * @num_parents:
+ *
+ * The number of interrupt parents of a GPIO chip.
+ */
+ unsigned int num_parents;
+
+ /**
+ * @parents:
+ *
+ * A list of interrupt parents of a GPIO chip. This is owned by the
+ * driver, so the core will only reference this list, not modify it.
+ */
+ unsigned int *parents;
};
static inline struct gpio_irq_chip *to_gpio_irq_chip(struct irq_chip *chip)
@@ -148,9 +163,6 @@ static inline struct gpio_irq_chip *to_gpio_irq_chip(struct irq_chip *chip)
* safely.
* @bgpio_dir: shadowed direction register for generic GPIO to clear/set
* direction safely.
- * @irq_chained_parent: GPIO IRQ chip parent/bank linux irq number,
- * provided by GPIO driver for chained interrupt (not for nested
- * interrupts).
* @irq_nested: True if set the interrupt handling is nested.
* @irq_need_valid_mask: If set core allocates @irq_valid_mask with all
* bits set to one
@@ -226,7 +238,6 @@ struct gpio_chip {
* With CONFIG_GPIOLIB_IRQCHIP we get an irqchip inside the gpiolib
* to handle IRQs for most practical cases.
*/
- unsigned int irq_chained_parent;
bool irq_nested;
bool irq_need_valid_mask;
unsigned long *irq_valid_mask;
--
2.14.1
Powered by blists - more mailing lists