From: Peter Hutterer <peter.hutterer@who-t.net>
Date: Thu, 24 Oct 2024 04:47:38 +0000 (+1000)
Subject: pad: don't clobber the errno if the pad led failed to initialize
X-Git-Tag: 1.27.0~20
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=7ae4fabb76f4fd3e833a445996afad695d821e30;p=platform%2Fupstream%2Flibinput.git

pad: don't clobber the errno if the pad led failed to initialize

pad_led_destroy() may call something that sets errno, so let's protect
against that.

Part-of: <https://gitlab.freedesktop.org/libinput/libinput/-/merge_requests/1070>
---

diff --git a/src/evdev-tablet-pad-leds.c b/src/evdev-tablet-pad-leds.c
index bcb41644..9037d20d 100644
--- a/src/evdev-tablet-pad-leds.c
+++ b/src/evdev-tablet-pad-leds.c
@@ -104,7 +104,7 @@ pad_led_new(struct libinput *libinput, const char *prefix, int group, int mode)
 {
 	struct pad_mode_led *led;
 	char path[PATH_MAX];
-	int rc, fd;
+	int rc, fd, save_errno;
 
 	led = zalloc(sizeof *led);
 	led->brightness_fd = -1;
@@ -133,7 +133,9 @@ pad_led_new(struct libinput *libinput, const char *prefix, int group, int mode)
 	return led;
 
 error:
+	save_errno = errno;
 	pad_led_destroy(libinput, led);
+	errno = save_errno;
 	return NULL;
 }
 #endif /* HAVE_LIBWACOM */