From a65d76c143b315c322b5c7a9fb365703c9f32798 Mon Sep 17 00:00:00 2001 From: Chen Yu Date: Sun, 3 May 2015 22:35:05 +0800 Subject: [RFC] init: support device of major:minor:offset format Distribution like Ubuntu uses klibc rather than uswsusp to resume system from hibernation, which will treat swap partition/file in the form of major:minor:offset. For example, 8:3:0 represents a swap partition in klibc, and klibc's resume process in initrd will finally echo 8:3:0 to /sys/power/resume for manually restoring. However in current implementation, 8:3:0 will be treated as an invalid device format, and it is found that manual resumming from hibernation will fail on lastest kernel. This patch adds support for device with major:minor:offset format when resumming from hibernation. Reported-by: Prigent, Christophe Signed-off-by: Chen Yu --- init/do_mounts.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/init/do_mounts.c b/init/do_mounts.c index 8369ffa..2d36bf1 100644 --- a/init/do_mounts.c +++ b/init/do_mounts.c @@ -225,10 +225,12 @@ dev_t name_to_dev_t(const char *name) #endif if (strncmp(name, "/dev/", 5) != 0) { - unsigned maj, min; + unsigned maj, min, offset; char dummy; - if (sscanf(name, "%u:%u%c", &maj, &min, &dummy) == 2) { + if ((sscanf(name, "%u:%u%c", &maj, &min, &dummy) == 2) || + (sscanf(name, "%u:%u:%u:%c", &maj, &min, &offset, + &dummy) == 3)) { res = MKDEV(maj, min); if (maj != MAJOR(res) || min != MINOR(res)) goto fail; -- 1.9.1