From: Andy Shevchenko andriy.shevchenko@linux.intel.com
[ Upstream commit 1cef8b5019769d46725932eeace7a383bca97905 ]
In the snippets like the following
if (...) return / goto / break / continue ...; else ...
the 'else' is redundant. Get rid of it. In case of IOCTLs use switch-case pattern that seems the usual in such cases.
While at it, clarify necessity of else in gpiod_direction_output() by attaching else if to the closing curly brace on a previous line.
Signed-off-by: Andy Shevchenko andriy.shevchenko@linux.intel.com Signed-off-by: Bartosz Golaszewski brgl@bgdev.pl Stable-dep-of: 533aae7c94db ("gpiolib: cdev: fix NULL-pointer dereferences") Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/gpio/gpiolib-cdev.c | 66 ++++++++++++++++++++----------------- drivers/gpio/gpiolib.c | 12 +++---- 2 files changed, 40 insertions(+), 38 deletions(-)
diff --git a/drivers/gpio/gpiolib-cdev.c b/drivers/gpio/gpiolib-cdev.c index 381cfa26a4a1..b51b4d7a611e 100644 --- a/drivers/gpio/gpiolib-cdev.c +++ b/drivers/gpio/gpiolib-cdev.c @@ -197,16 +197,15 @@ static long linehandle_ioctl(struct file *file, unsigned int cmd, void __user *ip = (void __user *)arg; struct gpiohandle_data ghd; DECLARE_BITMAP(vals, GPIOHANDLES_MAX); - int i; + unsigned int i; + int ret;
- if (cmd == GPIOHANDLE_GET_LINE_VALUES_IOCTL) { - /* NOTE: It's ok to read values of output lines. */ - int ret = gpiod_get_array_value_complex(false, - true, - lh->num_descs, - lh->descs, - NULL, - vals); + switch (cmd) { + case GPIOHANDLE_GET_LINE_VALUES_IOCTL: + /* NOTE: It's okay to read values of output lines */ + ret = gpiod_get_array_value_complex(false, true, + lh->num_descs, lh->descs, + NULL, vals); if (ret) return ret;
@@ -218,7 +217,7 @@ static long linehandle_ioctl(struct file *file, unsigned int cmd, return -EFAULT;
return 0; - } else if (cmd == GPIOHANDLE_SET_LINE_VALUES_IOCTL) { + case GPIOHANDLE_SET_LINE_VALUES_IOCTL: /* * All line descriptors were created at once with the same * flags so just check if the first one is really output. @@ -240,10 +239,11 @@ static long linehandle_ioctl(struct file *file, unsigned int cmd, lh->descs, NULL, vals); - } else if (cmd == GPIOHANDLE_SET_CONFIG_IOCTL) { + case GPIOHANDLE_SET_CONFIG_IOCTL: return linehandle_set_config(lh, ip); + default: + return -EINVAL; } - return -EINVAL; }
#ifdef CONFIG_COMPAT @@ -1165,14 +1165,16 @@ static long linereq_ioctl(struct file *file, unsigned int cmd, struct linereq *lr = file->private_data; void __user *ip = (void __user *)arg;
- if (cmd == GPIO_V2_LINE_GET_VALUES_IOCTL) + switch (cmd) { + case GPIO_V2_LINE_GET_VALUES_IOCTL: return linereq_get_values(lr, ip); - else if (cmd == GPIO_V2_LINE_SET_VALUES_IOCTL) + case GPIO_V2_LINE_SET_VALUES_IOCTL: return linereq_set_values(lr, ip); - else if (cmd == GPIO_V2_LINE_SET_CONFIG_IOCTL) + case GPIO_V2_LINE_SET_CONFIG_IOCTL: return linereq_set_config(lr, ip); - - return -EINVAL; + default: + return -EINVAL; + } }
#ifdef CONFIG_COMPAT @@ -2095,28 +2097,30 @@ static long gpio_ioctl(struct file *file, unsigned int cmd, unsigned long arg) return -ENODEV;
/* Fill in the struct and pass to userspace */ - if (cmd == GPIO_GET_CHIPINFO_IOCTL) { + switch (cmd) { + case GPIO_GET_CHIPINFO_IOCTL: return chipinfo_get(cdev, ip); #ifdef CONFIG_GPIO_CDEV_V1 - } else if (cmd == GPIO_GET_LINEHANDLE_IOCTL) { + case GPIO_GET_LINEHANDLE_IOCTL: return linehandle_create(gdev, ip); - } else if (cmd == GPIO_GET_LINEEVENT_IOCTL) { + case GPIO_GET_LINEEVENT_IOCTL: return lineevent_create(gdev, ip); - } else if (cmd == GPIO_GET_LINEINFO_IOCTL || - cmd == GPIO_GET_LINEINFO_WATCH_IOCTL) { - return lineinfo_get_v1(cdev, ip, - cmd == GPIO_GET_LINEINFO_WATCH_IOCTL); + case GPIO_GET_LINEINFO_IOCTL: + return lineinfo_get_v1(cdev, ip, false); + case GPIO_GET_LINEINFO_WATCH_IOCTL: + return lineinfo_get_v1(cdev, ip, true); #endif /* CONFIG_GPIO_CDEV_V1 */ - } else if (cmd == GPIO_V2_GET_LINEINFO_IOCTL || - cmd == GPIO_V2_GET_LINEINFO_WATCH_IOCTL) { - return lineinfo_get(cdev, ip, - cmd == GPIO_V2_GET_LINEINFO_WATCH_IOCTL); - } else if (cmd == GPIO_V2_GET_LINE_IOCTL) { + case GPIO_V2_GET_LINEINFO_IOCTL: + return lineinfo_get(cdev, ip, false); + case GPIO_V2_GET_LINEINFO_WATCH_IOCTL: + return lineinfo_get(cdev, ip, true); + case GPIO_V2_GET_LINE_IOCTL: return linereq_create(gdev, ip); - } else if (cmd == GPIO_GET_LINEINFO_UNWATCH_IOCTL) { + case GPIO_GET_LINEINFO_UNWATCH_IOCTL: return lineinfo_unwatch(cdev, ip); + default: + return -EINVAL; } - return -EINVAL; }
#ifdef CONFIG_COMPAT diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c index 59d8affad343..3e01a3ac652d 100644 --- a/drivers/gpio/gpiolib.c +++ b/drivers/gpio/gpiolib.c @@ -186,9 +186,8 @@ static int gpiochip_find_base(int ngpio) /* found a free space? */ if (gdev->base + gdev->ngpio <= base) break; - else - /* nope, check the space right before the chip */ - base = gdev->base - ngpio; + /* nope, check the space right before the chip */ + base = gdev->base - ngpio; }
if (gpio_is_valid(base)) { @@ -2481,8 +2480,7 @@ int gpiod_direction_output(struct gpio_desc *desc, int value) ret = gpiod_direction_input(desc); goto set_output_flag; } - } - else if (test_bit(FLAG_OPEN_SOURCE, &desc->flags)) { + } else if (test_bit(FLAG_OPEN_SOURCE, &desc->flags)) { ret = gpio_set_config(desc, PIN_CONFIG_DRIVE_OPEN_SOURCE); if (!ret) goto set_output_value; @@ -2656,9 +2654,9 @@ static int gpiod_get_raw_value_commit(const struct gpio_desc *desc) static int gpio_chip_get_multiple(struct gpio_chip *gc, unsigned long *mask, unsigned long *bits) { - if (gc->get_multiple) { + if (gc->get_multiple) return gc->get_multiple(gc, mask, bits); - } else if (gc->get) { + if (gc->get) { int i, value;
for_each_set_bit(i, mask, gc->ngpio) {