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gpio: remove dummy read from gpio_poll()

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resolves #15.

Signed-off-by: Vanya A. Sergeev <v@sergeev.io>
This commit is contained in:
longsky
2018-10-12 15:36:03 +08:00
committed by Vanya A. Sergeev
parent 2409e0c2ce
commit d880ef7d1e
1 changed files with 0 additions and 9 deletions
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9
src/gpio.c
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@@ -192,17 +192,8 @@ int gpio_write(gpio_t *gpio, bool value) {
int gpio_poll(gpio_t *gpio, int timeout_ms) {
struct pollfd fds[1];
char buf[1];
int ret;
/* Dummy read before poll */
if (read(gpio->fd, buf, 1) < 0)
return _gpio_error(gpio, GPIO_ERROR_IO, errno, "Reading GPIO 'value'");
/* Seek to end */
if (lseek(gpio->fd, 0, SEEK_END) < 0)
return _gpio_error(gpio, GPIO_ERROR_IO, errno, "Seeking to end of GPIO 'value'");
/* Poll */
fds[0].fd = gpio->fd;
fds[0].events = POLLPRI | POLLERR;