Re: why device invoke bus reset when inmass-storageprogress?

[Alan Stern <stern@xxxxxxxxxxxxxxxxxxx>]

On Thu, 22 Jun 2006, JackRain wrote:

> Alan Stern,ÄúºÃ£¡
> 
> 	thank you ! I have fixed this " bus reset " problem and the driver can be identified as a mass storage 
> 	
> 	in ____FULL SPEED____ mode.
> 
>     the bus reset was caused by too much __printk__ debug message  which delay the phase of SCSI command 
> 
>     then cause command time out~~~   and pc host reset device.
> 
>     I remove the printk message by "echo 0>/proc/sys/kernel/printk" ,then the mass storage can read and write.
> 
>     btw,even a printk message can slow down the speed of r/w operations.
> 
> 
>     now ,i have another question want to ask you:  
> 
> 	the device cound not work when it's in ___HIGH SPEED__ mode.
> 
>     it can be enmuated,but still go bus reset even i remove the printk message which slow down the usb speed.
> 
>     can anyone help me ??? thanks much~!

It would help a lot if you provided a kernel log with debugging enabled in 
the driver.

Alan Stern


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