From: Bartosz Golaszewski <bartekgola@gmail.com>
Date: Mon, 9 Jan 2017 14:12:03 +0000 (+0100)
Subject: core: fix gpiod_line_event_request()
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=114a2c87aa8666fffbbaa6519cc5b1b4f762edfb;p=qemu-gpiodev%2Flibgpiod.git

core: fix gpiod_line_event_request()

Correctly set the last error if the line is busy.

Signed-off-by: Bartosz Golaszewski <bartekgola@gmail.com>
---

diff --git a/core.c b/core.c
index eff1e68..006e18b 100644
--- a/core.c
+++ b/core.c
@@ -576,8 +576,10 @@ int gpiod_line_event_request(struct gpiod_line *line,
 	struct gpiod_chip *chip;
 	int status, fd;
 
-	if (gpiod_line_event_configured(line))
-		return -EBUSY;
+	if (!gpiod_line_is_free(line)) {
+		set_last_error(GPIOD_ELINEBUSY);
+		return -1;
+	}
 
 	req = &line->event;