Date: Wed, 5 May 2004 17:57:03 -0400 From: "Rita Lin" <ritalin@comcast.net> To: "Rita Lin" <ritalin@comcast.net>, <freebsd-hackers@freebsd.org> Subject: Re: Is it possible to lose a xfer request queued using usbd_transfer()? Message-ID: <004901c432eb$e6cb4100$9402a8c0@emachine> References: <004c01c43053$2a775920$9402a8c0@emachine><20040503120824.GG38488@cicely12.cicely.de><008901c4314e$72b214e0$9402a8c0@emachine><20040503211005.GJ38488@cicely12.cicely.de><001a01c43156$bce21c60$9402a8c0@emachine><20040503222538.GK38488@cicely12.cicely.de><006f01c43160$b84a1220$9402a8c0@emachine><20040503232850.GL38488@cicely12.cicely.de> <002701c432e9$783dc7a0$9402a8c0@emachine>
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TYPO -->dig<-- should be *dug*. ----- Original Message ----- From: Rita Lin <ritalin@comcast.net> To: <freebsd-hackers@freebsd.org> Sent: Wednesday, May 05, 2004 5:39 PM Subject: Is it possible to lose a xfer request queued using usbd_transfer()? > Hello, > > I stumbled on a problem that I need some suggestion to continue tracking > where the problem is. > I started a tip session to the usb port, after typing two characters, any > more input returned TS_BUSY. > I noticed that this problem also exists when I do a 'cat junk > /dev/ucom0'. > After two consecutive usbd_transfer(), it sits there. > > After some code tracking, I found that the ucomwritecb() for the third > usbd_transfer() never gets called in uhci_idone(). I haven't dig further > down yet. I'm going to do that tomorrow. If you have some idea, or have some > suggestion how I can tackle this problem, please shine some light on me. The > first two usbd_transfer are successful, and I could see the packets going > out to the USB port with a USB analyzer. > > Thank you so much. > Rita > > _______________________________________________ > freebsd-hackers@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-hackers > To unsubscribe, send any mail to "freebsd-hackers-unsubscribe@freebsd.org"
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