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

[Wolfram Sang]

On Fri, Jun 10, 2011 at 06:42:49PM +0800, Shawn Guo wrote:
> 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 at linaro.org>
> Cc: Eric Benard <eric at eukrea.com>

Hmm, that should get enough testing on non-imx (and even non-ARM)
devices. And a comment describing the situation.

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