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Problems with MMC/SD card on imx515/linux-2.6.31

Question asked by Robbie Jiang on Mar 11, 2014



I'm working on a MX515 board with Linux 2.6.31 kernel.

There is a Micro SD (16GB) card on the board.


There are two strange problems with the MMC / SD card.


1. Sometimes during the system booting, an error is reported:


mmc0: error -110 whilst initialising SD card

And therefore, the SD card can't be correctly initialized and mounted.


2.  Sometimes even after the SD card is correctly initialized,

it takes a long time to wait before mounting the SD card successfully.

This normally happens when the SD card is almost full of data.

What makes things stranger is that, after the long-time-mount is finished finally,

the consequent mount will restore normal.


Anyone has the same problem?

And any idea?