Messages in this thread |  | | | Date | Wed, 20 Feb 2008 18:30:41 +0100 | | From | Pierre Ossman <> | | Subject | Re: [Bug 10030] Suspend doesn't work when SD card is inserted |
On Wed, 20 Feb 2008 11:42:56 -0500 (EST) Alan Stern <stern@rowland.harvard.edu> wrote:
> > > > ------- Comment #14 from rjw@sisk.pl 2008-02-19 15:23 ------- > > Thanks a lot for the debugging work! > > > > First, the patch triggers, which means that the problem discovered by Alan is > > troubling us. [Alan, do you have an idea how to fix that cleanly?] > > I suggest we ask the maintainer for the MMC subsystem. > > Pierre, you can find the details in the bugzilla entry. Briefly, > there's a pathway in the MMC core suspend routine (if the driver > doesn't implement a resume hook) which could lead to the host being > removed during a system suspend. This is an illegal operation and it > will deadlock. > > Do you have a suggestion for a way to fix it? >
Not really. But you have some things confused. What it checks is if the mmc bus handler (not a proper driver model, just a way of separating the MMC, SD and SDIO stuff) has a resume function. And if it doesn't, it removes the card (since it cannot revive it at resume).
So the only thing I can think of is to delay the removal until the resume routine, if that is safer.
Rgds -- -- Pierre Ossman
Linux kernel, MMC maintainer http://www.kernel.org PulseAudio, core developer http://pulseaudio.org rdesktop, core developer http://www.rdesktop.org
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