While trying to copy some file(>400 MB) from PC to device in mass storage mode,an I/O error is observed.
>From the bus trace, it is observed that vfs_sync() is taking a lot of time when handing ALLOW_MEDIUM_REMOVAL.There is a similar problem already discussed earlier,although with no concrete conclusion. http://comments.gmane.org/gmane.linux.usb.general/53896 Even after ~15 secs, we don’t send the Status to PC for the ALLOW_MEDIUM_REMOVAL command. Since the vfs_sync command has not returned, USB driver is not sending the status.PC is sending the next command as it has not received the status for the previous command,and this messes up the state diagram. Issue observed on kernel 3.4 with sandisk 2GB card. Dees the current mass storage driver (f_mass_storage.c) support such a scenario,if not what would be the appropriate solution? -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
