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gpiolib: cdev: refactor lineevent cleanup into lineevent_free

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Consolidate the cleanup of lineevents, currently duplicated in
lineevent_create and lineevent_release, into a helper function
lineevent_free.

Signed-off-by: Kent Gibson <warthog618@gmail.com>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
This commit is contained in:
Kent Gibson 2020-07-08 12:15:56 +08:00 • committed by Bartosz Golaszewski
parent 883f919818
commit 4682427241
1 changed files with 22 additions and 24 deletions
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46
drivers/gpio/gpiolib-cdev.c
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@ -478,16 +478,20 @@ static ssize_t lineevent_read(struct file *file,
return bytes_read; return bytes_read;
} }
static void lineevent_free(struct lineevent_state *le)
{
if (le->irq)
free_irq(le->irq, le);
if (le->desc)
gpiod_free(le->desc);
kfree(le->label);
put_device(&le->gdev->dev);
kfree(le);
}
static int lineevent_release(struct inode *inode, struct file *file) static int lineevent_release(struct inode *inode, struct file *file)
{ {
struct lineevent_state *le = file->private_data; lineevent_free(file->private_data);
struct gpio_device *gdev = le->gdev;
free_irq(le->irq, le);
gpiod_free(le->desc);
kfree(le->label);
kfree(le);
put_device(&gdev->dev);
return 0; return 0;
} }
@ -612,7 +616,7 @@ static int lineevent_create(struct gpio_device *gdev, void __user *ip)
u32 eflags; u32 eflags;
int fd; int fd;
int ret; int ret;
int irqflags = 0; int irq, irqflags = 0;
if (copy_from_user(&eventreq, ip, sizeof(eventreq))) if (copy_from_user(&eventreq, ip, sizeof(eventreq)))
return -EFAULT; return -EFAULT;
@ -663,7 +667,7 @@ static int lineevent_create(struct gpio_device *gdev, void __user *ip)
ret = gpiod_request(desc, le->label); ret = gpiod_request(desc, le->label);
if (ret) if (ret)
goto out_free_label; goto out_free_le;
le->desc = desc; le->desc = desc;
le->eflags = eflags; le->eflags = eflags;
@ -671,16 +675,17 @@ static int lineevent_create(struct gpio_device *gdev, void __user *ip)
ret = gpiod_direction_input(desc); ret = gpiod_direction_input(desc);
if (ret) if (ret)
goto out_free_desc; goto out_free_le;
blocking_notifier_call_chain(&desc->gdev->notifier, blocking_notifier_call_chain(&desc->gdev->notifier,
GPIOLINE_CHANGED_REQUESTED, desc); GPIOLINE_CHANGED_REQUESTED, desc);
le->irq = gpiod_to_irq(desc); irq = gpiod_to_irq(desc);
if (le->irq <= 0) { if (irq <= 0) {
ret = -ENODEV; ret = -ENODEV;
goto out_free_desc; goto out_free_le;
} }
le->irq = irq;
if (eflags & GPIOEVENT_REQUEST_RISING_EDGE) if (eflags & GPIOEVENT_REQUEST_RISING_EDGE)
irqflags |= test_bit(FLAG_ACTIVE_LOW, &desc->flags) ? irqflags |= test_bit(FLAG_ACTIVE_LOW, &desc->flags) ?
@ -701,12 +706,12 @@ static int lineevent_create(struct gpio_device *gdev, void __user *ip)
le->label, le->label,
le); le);
if (ret) if (ret)
goto out_free_desc; goto out_free_le;
fd = get_unused_fd_flags(O_RDONLY | O_CLOEXEC); fd = get_unused_fd_flags(O_RDONLY | O_CLOEXEC);
if (fd < 0) { if (fd < 0) {
ret = fd; ret = fd;
goto out_free_irq; goto out_free_le;
} }
file = anon_inode_getfile("gpio-event", file = anon_inode_getfile("gpio-event",
@ -735,15 +740,8 @@ static int lineevent_create(struct gpio_device *gdev, void __user *ip)
out_put_unused_fd: out_put_unused_fd:
put_unused_fd(fd); put_unused_fd(fd);
out_free_irq:
free_irq(le->irq, le);
out_free_desc:
gpiod_free(le->desc);
out_free_label:
kfree(le->label);
out_free_le: out_free_le:
kfree(le); lineevent_free(le);
put_device(&gdev->dev);
return ret; return ret;
} }