[PATCH 1/4] mmc: sdhci: fix interrupt storm from card detection

[w.sang@pengutronix.de (Wolfram Sang)]

> > > The issue was initially found by Eric Benard as below.
> > > 
> > > http://permalink.gmane.org/gmane.linux.ports.arm.kernel/108031
> > > 
> > > Not sure about other SDHCI based controller, but on Freescale eSDHC,
> > > the SDHCI_INT_CARD_INSERT bits will be immediately set again when it
> > > gets cleared, if a card is inserted. The driver need to mask the irq
> > > to prevent interrupt storm which will freeze the system.  And the
> > > SDHCI_INT_CARD_REMOVE gets the same situation.
> > > 
> > > The patch fixes the problem based on the initial idea from
> > > Eric Benard.
> > > 
> > > Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
> > > Cc: Eric Benard <eric@eukrea.com>
> > 
> > Hmm, that should get enough testing on non-imx (and even non-ARM)
> > devices. And a comment describing the situation.
> > 
> Agreed.  Will add something in commit message to mention the
> situation.  That's why I hope we can get the patch on mmc-next at

I actually meant a comment in the code, so it will be obvious for later
hackers why the "extra" steps are in there...

-- 
Pengutronix e.K.                           | Wolfram Sang                |
Industrial Linux Solutions                 | http://www.pengutronix.de/  |
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