mmc: sdhci: fix interrupt storm from card detection
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: NShawn Guo <shawn.guo@linaro.org> Cc: Eric Benard <eric@eukrea.com> Tested-by: NArnaud Patard <arnaud.patard@rtp-net.org> Signed-off-by: NChris Ball <cjb@laptop.org>
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