Hi, After bisecting, I found that the commit below can ruin the mmc card data (writing incorrect file, or fs is corrupt) on my beagle-xm revB, and reverting the commit below will fix the problem. commit dba3c29ea4a1d5d544f59b94fd8a41662135e071 Author: Balaji T K <balajitk@xxxxxx> Date: Mon Apr 9 12:08:32 2012 +0530 mmc: omap_hsmmc: Enable Auto CMD12 Enable Auto-CMD12 for multi block read/write on HSMMC. Tested on OMAP4430, OMAP3430 and OMAP2430 SDP Thanks, -- Ming Lei -- To unsubscribe from this list: send the line "unsubscribe linux-mmc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html