自己移植了下内核3.8.6，移植完S5PV210的USB EHCI和OHCI后看打印信息都正常，挂载U盘后也可以正常读取U盘内的数据，但是只要对U盘内的数据略作修改，就无法umount，如果不修改的话umount很正常，另外，禁用EHCI而采用OHCI的话，是完全正常的。。。
umount时信息如下，求版主指导下：
usb 1-1.2: reset high-speed USB device number 3 using s5p-ehci
usb 1-1.2: reset high-speed USB device number 3 using s5p-ehci
usb 1-1.2: reset high-speed USB device number 3 using s5p-ehci
usb 1-1.2: reset high-speed USB device number 3 using s5p-ehci
sd 0:0:0:0: [sda] Unhandled error code
sd 0:0:0:0: [sda]
Result: hostbyte=0x05 driverbyte=0x00
sd 0:0:0:0: [sda] CDB:
cdb[0]=0x2a: 2a 00 00 00 40 3f 00 00 01 00
end_request: I/O error, dev sda, sector 16447
Buffer I/O error on device sda4, logical block 16384
lost page write due to I/O error on sda4
