how mass storage device cope with unsupported commands?

["JackRain" <hejieming@xxxxxxxxx>]

linux-usb-users，您好！

	      hi,glad to see you again:)

		  i would like to ask a question about ：  how does mass storage device cope with unsupported commands,such as 0x23 etc?

		  my way is :  refering to mass bulk-only spec.(usbmassbulk_10  6.6.4 command failure),

	      The device shall report this condition by returning a Command Failed status (bCSWStatus = 01h).

		  so,i now try :

			   1) return with sense_data 6th,12th,13th: 0x5,0x24,0x00.

			   2) return CSW with status (0x01) fail.

          but it seems from bus hound that ,the USB commnication halt a long time then reset.

		  another method i have tried is to stall the bulk-in endpoint then wait host __set feature__ and unstall endpoint.
	
		  this failed again~

          could anyone tell me the correct way ?? thank you very much~

　　　　　　　　致
礼！
 				

　　　　　　　　JackRain
　　　　　　　　hejieming@xxxxxxxxx
　　　　　　　　　　2006-06-28

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