linux-kernel - Re: pl2303 ttyUSB0: pl2303_write - failed submitting write urb, error -22

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Date:	Mon, 25 Oct 2010 15:00:35 +0530
From:	"Raju Rameshwar Uprade" <rajsingh@...a.tifr.res.in>
To:	Greg KH <greg@...ah.com>,
	Raju Rameshwar Uprade <rajsingh@...a.tifr.res.in>
Cc:	linux-kernel@...r.kernel.org, linux-usb@...r.kernel.org
Subject: Re: pl2303 ttyUSB0: pl2303_write - failed submitting write urb, error -22


> > > What kernel version are you using?
> > > 
> > 
> > I am using kernel version 2.6.25.I cann't use current linux kernel version because it
> > uses the generic write function and for my application I need pl2303_write.
> 
> Then you are really on your own here, sorry.
> 
> good luck,
> 
> greg k-h


Hi Greg.
             
          I am now able to transmit the Address byte with mark parity and data bytes
with space parity properly.

Thanks a lot greg for you help....

Below is the control signal and data going out on USB bus number 7.

f5aafd00 2277683484 S Co:7:002:0 s 21 20 0000 0000 0007 7 = 80250000 000308  // Control
signal for  mark parity

f5aafd00 2277684456 C Co:7:002:0 0 7 >
f5aafd00 2277684497 S Co:7:002:0 s 21 22 0003 0000 0000 0
f5aafd00 2277685456 C Co:7:002:0 0 0
f2b8e900 2277685476 S Bo:7:002:2 -115 1 = 05        // Address byte
f5aafd00 2277685482 S Ci:7:002:0 s a1 21 0000 0000 0007 7 <
f5aafd00 2277686455 C Ci:7:002:0 0 7 = 80250000 000308
f2b8e900 2277686461 C Bo:7:002:2 0 1 >
f5aafd00 2277686518 S Co:7:002:0 s 21 20 0000 0000 0007 7 = 80250000 000408            
       // Control signal for Space parity
f5aafd00 2277687457 C Co:7:002:0 0 7 >
f2b8e900 2277687471 S Bo:7:002:2 -115 8 = 08000000 000000f8  // Data bytes
f5aafd00 2277687474 S Ci:7:002:0 s a1 21 0000 0000 0007 7 <
f5aafd00 2277688455 C Ci:7:002:0 0 7 = 80250000 000408
f2b8e900 2277688461 C Bo:7:002:2 0 8 >
f5aafd00 2277697534 S Co:7:002:0 s 21 22 0000 0000 0000 0
f5aafd00 2277698456 C Co:7:002:0 0 0
f2b8e580 2277700457 C Ii:7:002:1 0:1 10 = a1200000 00000200 4000  // What I am receiving
currently.
f2b8e580 2277700486 S Ii:7:002:1 -115:1 10 <
f2b8e580 2277702455 C Ii:7:002:1 0:1 10 = a1200000 00000200 4000
f2b8e580 2277702478 S Ii:7:002:1 -115:1 10 <
f2b8e580 2277704455 C Ii:7:002:1 0:1 10 = a1200000 00000200 4000
f2b8e580 2277704477 S Ii:7:002:1 -115:1 10 <
f2b8e580 2277706457 C Ii:7:002:1 0:1 10 = a1200000 00000200 4000
f2b8e580 2277706480 S Ii:7:002:1 -115:1 10 <
f2b8e580 2277708455 C Ii:7:002:1 0:1 10 = a1200000 00000200 4000
f2b8e580 2277708476 S Ii:7:002:1 -115:1 10 <
f2b8e580 2277710455 C Ii:7:002:1 0:1 10 = a1200000 00000200 4000
f2b8e580 2277710484 S Ii:7:002:1 -115:1 10 <
f2b8e580 2277712455 C Ii:7:002:1 0:1 10 = a1200000 00000200 4000
f2b8e580 2277712477 S Ii:7:002:1 -115:1 10 <
f2b8e580 2277714454 C Ii:7:002:1 0:1 10 = a1200000 00000200 4000
f2b8e580 2277714471 S Ii:7:002:1 -115:1 10 <
f2b8e580 2277716452 C Ii:7:002:1 0:1 10 = a1200000 00000200 4000
f2b8e580 2277716464 S Ii:7:002:1 -115:1 10 <
f2b8e580 2277718455 C Ii:7:002:1 0:1 10 = a1200000 00000200 0000
f2b8e580 2277718480 S Ii:7:002:1 -115:1 10 <


Thanks & Regards,
 Raj.
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