X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=blobdiff_plain;f=src%2Flibelogind%2Fsd-device%2Fsd-device.c;h=7cea5a074658ef5a63dda89881eba859a19dd0a2;hp=b274f710935841f027c94c45d5dcf04dc9a58373;hb=f6035a5ec8045bf007c7ebc5ee5306418644e7aa;hpb=ffd9a99e116775904762b688b2caabbc61e74c82

diff --git a/src/libelogind/sd-device/sd-device.c b/src/libelogind/sd-device/sd-device.c
index b274f7109..7cea5a074 100644
--- a/src/libelogind/sd-device/sd-device.c
+++ b/src/libelogind/sd-device/sd-device.c
@@ -791,6 +791,9 @@ _public_ int sd_device_get_subsystem(sd_device *device, const char **ret) {
                 device->subsystem_set = true;
         }
 
+        if (!device->subsystem)
+                return -ENOENT;
+
         *ret = device->subsystem;
 
         return 0;
@@ -908,6 +911,9 @@ _public_ int sd_device_get_driver(sd_device *device, const char **ret) {
                         return log_debug_errno(r, "sd-device: could not set driver for %s: %m", device->devpath);
         }
 
+        if (!device->driver)
+                return -ENOENT;
+
         *ret = device->driver;
 
         return 0;
@@ -1002,6 +1008,8 @@ _public_ int sd_device_get_sysname(sd_device *device, const char **ret) {
                         return r;
         }
 
+        assert_return(device->sysname, -ENOENT);
+
         *ret = device->sysname;
 
         return 0;