Re: Reg:Nand Flash Issue

On Wed, 5 Sep 2007, mahesh waran wrote:

> Hi Engineers,
> 
>               Dear all:
> 
>  When I use the g_file_strogae.ko module, I failed to write big file to
> 
>  the disk.
> 
>  Hardware platform:
> 
>  CPU: S3C2440A
> 
>  SDRAM: 32M sdram
> 
>  Kernel:2.6.19 
>  processor:AT91SAM9261
>  
>  I plug a 256MBytes usb flashdisk(fat32 type) into the board usb host
> 
>  interface, and connect a usb line between the board usb device interface
> 
>  and a PC with WinXP OS. 
> In the board side, I use the following command:
> 
>  #> insmod ./g_file_storage.ko file=/dev/sda removable=1
> 
>  where /dev/sda is the external 256MB flash disk.
> 
>  Then in the PC side, XP can recognize the board as a usb mass storage
> 
>  device. And read big file(3Mbytes) is OK.
> 
>  But when I write a big file(3Mbytes) into the board from XP side, the
> 
>  speed is very slow and finally failed. (Write a 3KBytes file is OK). In
> 
>  the board side, kernel repeatedly printed following message every
> 
>  several seconds. "g_file_storage gadget: full speed config #1".
> 
>  What's wrong with it?

All those "full speed config #1" messages show up because the PC is 
resetting your board.  It does the reset because an error has occurred.

Does it work any better if you add "stall=n" to the insmod command 
line?

Alan Stern


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