Commit 2f84a2de authored by Kent Gibson's avatar Kent Gibson Committed by Linus Walleij
Browse files

gpio: uapi: clarify the meaning of 'empty' char arrays 



Clarify that a char array containing a string is considered 'empty' if
the first character is the null terminator. The remaining characters
are not relevant to this determination.

Signed-off-by: default avatarKent Gibson <warthog618@gmail.com>
Reviewed-by: default avatarBartosz Golaszewski <bgolaszewski@baylibre.com>
Reviewed-by: default avatarAndy Shevchenko <andy.shevchenko@gmail.com>
Link: https://lore.kernel.org/r/20201005070329.21055-6-warthog618@gmail.com


Signed-off-by: default avatarLinus Walleij <linus.walleij@linaro.org>
parent c303c51c

include/uapi/linux/gpio.h

+3 −3
Original line number Diff line number Diff line
@@ -26,7 +26,7 @@ 
 * struct gpiochip_info - Information about a certain GPIO chip

 * @name: the Linux kernel name of this GPIO chip

 * @label: a functional name for this GPIO chip, such as a product

 * number, may be empty

 * number, may be empty (i.e. label[0] == '\0')

 * @lines: number of GPIO lines on this chip

 */

struct gpiochip_info {
@@ -203,7 +203,7 @@ struct gpio_v2_line_request { 
 * struct gpio_v2_line_info - Information about a certain GPIO line

 * @name: the name of this GPIO line, such as the output pin of the line on

 * the chip, a rail or a pin header name on a board, as specified by the

 * GPIO chip, may be empty

 * GPIO chip, may be empty (i.e. name[0] == '\0')

 * @consumer: a functional name for the consumer of this GPIO line as set

 * by whatever is using it, will be empty if there is no current user but

 * may also be empty if the consumer doesn't set this up
@@ -315,7 +315,7 @@ struct gpio_v2_line_event { 
 * @flags: various flags for this line

 * @name: the name of this GPIO line, such as the output pin of the line on the

 * chip, a rail or a pin header name on a board, as specified by the gpio

 * chip, may be empty

 * chip, may be empty (i.e. name[0] == '\0')

 * @consumer: a functional name for the consumer of this GPIO line as set by

 * whatever is using it, will be empty if there is no current user but may

 * also be empty if the consumer doesn't set this up