Use the name_to_dev_t call to parse the device name echo'd to to /sys/power/resume. This imitates the method used in hibernate.c in software_resume, and allows the resume partition to be specified using other equivalent device formats as well. By allowing /sys/debug/resume to accept the same syntax as the resume=device parameter, we can parse the resume=device in the init script and use the resume device directly from the kernel command line.
Signed-off-by: Sebastian Capella sebastian.capella@linaro.org --- kernel/power/hibernate.c | 14 +++++++++----- 1 file changed, 9 insertions(+), 5 deletions(-)
diff --git a/kernel/power/hibernate.c b/kernel/power/hibernate.c index b26f5f1..51d4c29 100644 --- a/kernel/power/hibernate.c +++ b/kernel/power/hibernate.c @@ -971,15 +971,19 @@ static ssize_t resume_show(struct kobject *kobj, struct kobj_attribute *attr, static ssize_t resume_store(struct kobject *kobj, struct kobj_attribute *attr, const char *buf, size_t n) { - unsigned int maj, min; dev_t res; int ret = -EINVAL; + int len = n; + char *devcpy;
- if (sscanf(buf, "%u:%u", &maj, &min) != 2) - goto out; + if (buf[len-1] == '\n') + len--; + + devcpy = kstrndup(buf, len, GFP_KERNEL); + res = name_to_dev_t(devcpy); + kfree(devcpy);
- res = MKDEV(maj,min); - if (maj != MAJOR(res) || min != MINOR(res)) + if (res == 0) goto out;
lock_system_sleep();