[PATCH] PM: HIBERNATION: add resume_wait param to support MMC-like devices as resume file

[Luca Tettamanti]

On Thu, Sep 29, 2011 at 11:29 AM, Barry Song <Barry.Song at csr.com> wrote:
> From: Barry Song <baohua.song at csr.com>
>
> Some devices like mmc are async detected very slow. For example,
> drivers/mmc/host/sdhci.c launchs a 200ms delayed work to detect
> mmc partitions then add disk.
>
> we do have wait_for_device_probe and scsi_complete_async_scans
> before calling swsusp_check, but it is not enough to wait mmc.
>
> This patch adds resumewait kernel param just like rootwait so
> that we have enough time to wait mmc ready. The differene is
> here we wait for resume partition but rootwait waits for rootfs
> partition.

I assume that such a device would need "rootwait" to boot in the first
place; why don't you "overload" the param to also enable waiting in
the resume path?

Luca