Hi, >>> Thanks. Working on this problem now. Another problem observed for >>> SCSI_READ_10 command, when reading from the SD card, the gadget driver >>> never sends the MBR address, the FAT boot record address, the start of FAT >>> address, and the start of FAT cluster address to the SD card driver. >> >> The gadget doesn't make up addresses by itself. It always sends the >> address the host tells it to send. >> >>> The >>> address sent by gadget driver is wrong. >> >> Then the address sent by the host is wrong. >> >> However, I suspect you are mistaken. In your usbmon trace earlier, the >> very first READ(10) command had a logical block address of 0. That is >> the address of the MBR. If the driver hadn't failed at that point, the >> host would have gone on to ask for the address of the boot sector and >> other things. > > Yes, the very first READ(10) command has a logical block address of 0 > (as shown below). I will generate the fresh usbmon trace the next > day, i do not have access to the platform now. > > f59e13c0 3246885432 S Bo:2:046:1 -115 31 = 55534243 0c000000 00100000 > 80000a28 00000000 00000008 00000000 000000 > Here is the fresh usbmon trace. Four SCSI commands are shown. The first SCSI_READ_10 command has LBA of 0. The second SCSI_READ_10 command has LBA of 0x00ed2900, which is wrong. Somehow, the first SCSI_READ_10 command got the wrong data, i think. Isn't it? f31a9740 4037054141 S Bo:2:071:1 -115 31 = 55534243 0c000000 00100000 80000a28 00000000 00000008 00000000 000000 f31a9740 4037054176 C Bo:2:071:1 0 31 > f4a555c0 4037054184 S Bi:2:071:1 -115 4096 < f4a555c0 4037108430 C Bi:2:071:1 0 4096 = eb58904d 53444f53 352e3000 02402e11 02000000 00f80000 3f00ff00 00200000 f31a9740 4037108476 S Bi:2:071:1 -115 13 < f31a9740 4037114564 C Bi:2:071:1 0 13 = 55534253 0c000000 00000000 00 f31a9740 4037114722 S Bo:2:071:1 -115 31 = 55534243 0d000000 00000000 00000600 00000000 00000000 00000000 000000 f31a9740 4037114801 C Bo:2:071:1 0 31 > f31a9740 4037114805 S Bi:2:071:1 -115 13 < f31a9740 4037121303 C Bi:2:071:1 0 13 = 55534253 0d000000 00000000 00 f31a9740 4037121388 S Bo:2:071:1 -115 31 = 55534243 0e000000 08000000 80000a25 00000000 00000000 00000000 000000 f31a9740 4037121550 C Bo:2:071:1 0 31 > f4a552c0 4037121559 S Bi:2:071:1 -115 8 < f4a552c0 4037127426 C Bi:2:071:1 0 8 = 00ed29c7 00000200 f31a9740 4037127435 S Bi:2:071:1 -115 13 < f31a9740 4037133064 C Bi:2:071:1 0 13 = 55534253 0e000000 00000000 00 f31a9740 4037133100 S Bo:2:071:1 -115 31 = 55534243 0f000000 00100000 80000a28 0000ed29 00000008 00000000 000000 f31a9740 4037133176 C Bo:2:071:1 0 31 > f4a552c0 4037133184 S Bi:2:071:1 -115 4096 < f4a552c0 4037184441 C Bi:2:071:1 0 4096 = ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff f31a9740 4037184453 S Bi:2:071:1 -115 13 < f31a9740 4037190564 C Bi:2:071:1 0 13 = 55534253 0f000000 00000000 00 Thanks, victor -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
