libbb/loop: fix existence check for LOOP_CONFIGURE ioctl
No binary (build failed)
gcc -Wp,-MD,applets/.usage.d -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer -Iinclude -Iinclude -o applets/usage applets/usage.c
(log yok)
| @@ -158,7 +158,7 @@ static int set_loopdev_params(int lfd, | |
| if (rc == 0) | |
| return rc; /* SUCCESS! */ | |
| # if ENABLE_TRY_LOOP_CONFIGURE | |
| - | if (errno != EINVAL) |
| + | if (errno != EINVAL && errno != ENOTTY) |
| return rc; /* error other than old kernel */ | |
| /* Old kernel, fall through into old way to do it: */ | |
| # endif | |