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authorBarry Song <baohua.song@csr.com>2011-10-06 20:34:46 +0200
committerRafael J. Wysocki <rjw@sisk.pl>2011-10-16 23:30:36 +0200
commit6f8d7022a842809aeb24db1d15669198ef02c131 (patch)
treeae1d4bacda83b3f430c644cf2479ffb1948bb30c /drivers
parent21e82808fc465b66fedaac0f4e885cafb304e843 (diff)
PM / Hibernate: Add resumewait param to support MMC-like devices as resume file
Some devices like MMC are async detected very slow. For example, drivers/mmc/host/sdhci.c launches a 200ms delayed work to detect MMC partitions then add disk. We have wait_for_device_probe() and scsi_complete_async_scans() before calling swsusp_check(), but it is not enough to wait for MMC. This patch adds resumewait kernel param just like rootwait so that we have enough time to wait until MMC is ready. The difference is that we wait for resume partition whereas rootwait waits for rootfs partition (which may be on a different device). This patch will make hibernation support many embedded products without SCSI devices, but with devices like MMC. [rjw: Modified the changelog slightly.] Signed-off-by: Barry Song <Baohua.Song@csr.com> Reviewed-by: Valdis Kletnieks <valdis.kletnieks@vt.edu> Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
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