Re: [PATCH 2/2] mmc: fix mmc card disappearence on resume on ricohmmc controllers

From: Maxim Levitsky
Date: Tue Jun 08 2010 - 04:58:01 EST

On Sun, 2010-06-06 at 19:22 -0400, Philip Langdale wrote:
> On Mon, 7 Jun 2010 00:28:51 +0300, Maxim Levitsky
> <maximlevitsky@xxxxxxxxx> wrote:
> > The reason was that it takes time for controller to detect the card.
> > So wait a bit for the card to appear.
> > In worst case scenario, when you suspend the system with mmc card,
> > and actually remove it, the resume will be delayed maximum by 2 seconds
> I suspect it's probably sending an SD id command to the card and then that
> has to time out on MMC cards.
> Acked-by: Philip Langdale <philipl@xxxxxxxxx>


Note that I spoke too soon about it being perfect
While mmc card that stays in slot now works fine, a card that is
inserted while system is asleep, is detected, but then controller
becomes confused, so card doesn't work. A reinsert does help though.
Overall I need to work around some unusual delays imposed by controller
due to unusual card detection.
I'll sort that out eventually (and hope not to bring much ugliness to

I think I update this patch to address both issues.

Best regards,
Maxim Levitsky

To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at
Please read the FAQ at