From: Bartosz Golaszewski <bartekgola@gmail.com>
Date: Mon, 9 Jan 2017 12:23:00 +0000 (+0100)
Subject: core: new error number
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=76ad46ef425c70e25ab797c4db93f85c20a173c6;p=qemu-gpiodev%2Flibgpiod.git

core: new error number

Add an error number indicating that a bulk operation was requested
on a set of lines not belonging to the same gpiochip.

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

diff --git a/core.c b/core.c
index a55de83..2ccd6ad 100644
--- a/core.c
+++ b/core.c
@@ -67,6 +67,7 @@ static __thread char errmsg[ERRSTR_MAX];
 static const char *const error_descr[] = {
 	"success",
 	"GPIO line not requested",
+	"GPIO lines in bulk don't belong to the same gpiochip",
 };
 
 static void set_last_error(int errnum)
@@ -345,9 +346,10 @@ int gpiod_line_request_bulk(struct gpiod_line_bulk *line_bulk,
 	int status, fd;
 	unsigned int i;
 
-	/* Paranoia: verify that all lines are from the same gpiochip. */
-	if (!verify_line_bulk(line_bulk))
+	if (!verify_line_bulk(line_bulk)) {
+		set_last_error(GPIOD_EBULKINCOH);
 		return -1;
+	}
 
 	req = zalloc(sizeof(*req));
 	if (!req)
diff --git a/gpiod.h b/gpiod.h
index c4f08c7..f490671 100644
--- a/gpiod.h
+++ b/gpiod.h
@@ -79,6 +79,8 @@ enum {
 	/**< No error. */
 	GPIOD_EREQUEST,
 	/**< The caller has no ownership of this line. */
+	GPIOD_EBULKINCOH,
+	/**< Not all lines in bulk belong to the same GPIO chip. */
 	__GPIOD_MAX_ERR,
 	/**< Private: number of libgpiod-specific error numbers. */
 };