Re: [4.1-rc1][Hibernation failed] bisect result included

[Rafael J. Wysocki]

On Sunday, May 03, 2015 03:54:39 PM Chen, Yu C wrote:
> Hi,all,
> When we are doing QA test, a hibernation failor was found on latest kernel 4.1-rc1,
> resume from hibernation failed with the following error:
> 
> PM: Hibernation image not present or could not be loaded.
> 
> Bisect shows following commit might trigger this problem:
> commit 283e7ad0241155710f99a9f39d13313a53336926
> 
> The  reason for failor is that, some distribution use klibc in initrd
> to restore the image, and klibc will provide kernel with the device 
> format of major:minor:offset,
> for example, 8:3:0 represents a swap partition, and klibc will
> echo 8:3:0 > /sys/power/resume to resume the system manually.
> However in current implementation, format of 8:3:0 will be regarded 
> as an invalid device, so restoring from hibernation failed.
> 
> Do we need to add support for device format like 8:3:0?
> I'm happy to debug more specifically if you can let me know what 
> would be of use, and I've also attached a temporary patch 
> for this problem, not sure if it is suitable,  thanks.

It'd be better to send the patch inline so it is not lost in replies.
Reproduced below.

Dan, Mike, any chance to look at this?  It is a functional regression for
some people.


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