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gpiolib: Separate GPIO_GET_LINEINFO_WATCH_IOCTL conditional

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We already have two conditionals inside the outer one to check
if the command is GPIO_GET_LINEINFO_WATCH_IOCTL. I think it's
time to actually do what I have proposed in the first place, i.e.
to separate GPIO_GET_LINEINFO_WATCH_IOCTL from GPIO_GET_LINEINFO_IOCTL.
It's +13 LOCs, and surprisingly only +13 bytes of binary on x86_32,
but for the price of much better readability.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Link: https://lore.kernel.org/r/20200525194028.74236-1-andriy.shevchenko@linux.intel.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Andy Shevchenko 2020-05-25 22:40:28 +03:00 committed by Linus Walleij
parent ce1d966a30
commit a34d5e5631
1 changed files with 24 additions and 11 deletions
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35
drivers/gpio/gpiolib.c
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@ -1265,8 +1265,7 @@ static long gpio_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
if (copy_to_user(ip, &chipinfo, sizeof(chipinfo)))
return -EFAULT;
return 0;
} else if (cmd == GPIO_GET_LINEINFO_IOCTL ||
cmd == GPIO_GET_LINEINFO_WATCH_IOCTL) {
} else if (cmd == GPIO_GET_LINEINFO_IOCTL) {
struct gpioline_info lineinfo;
if (copy_from_user(&lineinfo, ip, sizeof(lineinfo)))
@ -1278,8 +1277,28 @@ static long gpio_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
hwgpio = gpio_chip_hwgpio(desc);
if (cmd == GPIO_GET_LINEINFO_WATCH_IOCTL &&
test_bit(hwgpio, priv->watched_lines))
gpio_desc_to_lineinfo(desc, &lineinfo);
if (copy_to_user(ip, &lineinfo, sizeof(lineinfo)))
return -EFAULT;
return 0;
} else if (cmd == GPIO_GET_LINEHANDLE_IOCTL) {
return linehandle_create(gdev, ip);
} else if (cmd == GPIO_GET_LINEEVENT_IOCTL) {
return lineevent_create(gdev, ip);
} else if (cmd == GPIO_GET_LINEINFO_WATCH_IOCTL) {
struct gpioline_info lineinfo;
if (copy_from_user(&lineinfo, ip, sizeof(lineinfo)))
return -EFAULT;
desc = gpiochip_get_desc(gc, lineinfo.line_offset);
if (IS_ERR(desc))
return PTR_ERR(desc);
hwgpio = gpio_chip_hwgpio(desc);
if (test_bit(hwgpio, priv->watched_lines))
return -EBUSY;
gpio_desc_to_lineinfo(desc, &lineinfo);
@ -1287,14 +1306,8 @@ static long gpio_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
if (copy_to_user(ip, &lineinfo, sizeof(lineinfo)))
return -EFAULT;
if (cmd == GPIO_GET_LINEINFO_WATCH_IOCTL)
set_bit(hwgpio, priv->watched_lines);
set_bit(hwgpio, priv->watched_lines);
return 0;
} else if (cmd == GPIO_GET_LINEHANDLE_IOCTL) {
return linehandle_create(gdev, ip);
} else if (cmd == GPIO_GET_LINEEVENT_IOCTL) {
return lineevent_create(gdev, ip);
} else if (cmd == GPIO_GET_LINEINFO_UNWATCH_IOCTL) {
if (copy_from_user(&offset, ip, sizeof(offset)))
return -EFAULT;