I contacted the original author of the patch (http://comments.gmane.org/gmane.linux.kernel.mmc/9168) And he has posted the 2nd version of the commit. [PATCH V2]mmc: remove MMC bus legacy suspend/resume method MMC bus is using legacy suspend/resume method, which is not compatible if runtime pm callbacks are used. In this scenario, MMC bus suspend/resume callbacks cannot be called when system entering S3. So change to use the new defined dev_pm_ops for system sleeping mode Signed-off-by: Chuanxiao Dong <chuanxiao.dong@xxxxxxxxx> --- Changes in v2: use SET_SYSTEM_SLEEP_PM_OPS to define sleep callbacks as Rafael suggested May be you can test your setup with this patch. On Fri, Mar 30, 2012 at 10:55:45, Sujit Reddy Thumma wrote: > On 3/30/2012 8:17 AM, NeilBrown wrote: > > > > I've been experimenting with removing the call to sys_sync() in > > enter_state(). For me (with verbose debugging and syslog running) > > this causes a noticeable delay when entering suspend. > > [...snip...] > > > > Since removing the sys_sync() call I've notices a number of problems with > > suspend/resume, the most obvious being that resume blocks in mmc_claim_host: > > > > [ 263.585754] susman D c046455c 5604 1086 1084 0x00000000 > > [ 263.592498] [<c046455c>] (__schedule+0x584/0x614) from [<c0302630>] (__mmc_claim_host+0xb8/0x154) > > [ 263.601806] [<c0302630>] (__mmc_claim_host+0xb8/0x154) from [<c0308640>] (mmc_sd_resume+0x34/0x5c) > > [ 263.611206] [<c0308640>] (mmc_sd_resume+0x34/0x5c) from [<c0301ce4>] (mmc_resume_host+0xc8/0x15c) [...snip...] > This was pointed out earlier and a patch is posted but looks like it > never went into mmc tree -- > http://comments.gmane.org/gmane.linux.kernel.mmc/9168 > > > > > > > Thanks for any help you can provide, > > > > NeilBrown > > > > -- Regards, Gururaja -- To unsubscribe from this list: send the line "unsubscribe linux-mmc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
