I'm using a Yocto image on an iMX6 SoC ev-board and I would like to write a C code to access the USB storage device via sg driver.
Since I need to access the logical blocks of the storage directly instead of transferring through kernel buffer, I attempt to change the /proc/scsi/sg/allow_dio flag on the pseudo file system which introduced by the document Linux Version 3 SCSI Generic Driver, but I can't find the folder /proc/scsi/sg in the file system.
I think the sg module has been loaded on the running system because I can operate to the USB storage with the indirect method (but that's not appropriate to my demand).
Is there a alternate way to enable the direct IO or how to make /proc/scsi/sg appears?
