* Re: gspca - pac7302: Add a delay on loading the bridge registers.
@ 2010-01-08 17:29 Németh Márton
2010-01-09 12:36 ` Jean-Francois Moine
0 siblings, 1 reply; 2+ messages in thread
From: Németh Márton @ 2010-01-08 17:29 UTC (permalink / raw)
To: Jean-Francois Moine; +Cc: V4L Mailing List
Hi,
At http://linuxtv.org/hg/~jfrancois/gspca/rev/b0a374674388 :
> From: Jean-Francois Moine <moinejf@free.fr>
>
> Without the delay, the usb_control_msg() may fail when loading the
> page 3 with error -71 or -62.
>
> Priority: normal
>
> Signed-off-by: Jean-Francois Moine <moinejf@free.fr>
include/asm-generic/errno.h:
> #define ETIME 62 /* Timer expired */
> #define EPROTO 71 /* Protocol error */
I'm interested in which device have you used for testing this?
Regards,
Márton Németh
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: gspca - pac7302: Add a delay on loading the bridge registers.
2010-01-08 17:29 gspca - pac7302: Add a delay on loading the bridge registers Németh Márton
@ 2010-01-09 12:36 ` Jean-Francois Moine
0 siblings, 0 replies; 2+ messages in thread
From: Jean-Francois Moine @ 2010-01-09 12:36 UTC (permalink / raw)
To: Németh Márton; +Cc: V4L Mailing List
On Fri, 08 Jan 2010 18:29:02 +0100
Németh Márton <nm127@freemail.hu> wrote:
> > Without the delay, the usb_control_msg() may fail when loading the
> > page 3 with error -71 or -62.
> >
> > Priority: normal
> >
> > Signed-off-by: Jean-Francois Moine <moinejf@free.fr>
>
> include/asm-generic/errno.h:
> > #define ETIME 62 /* Timer expired */
> > #define EPROTO 71 /* Protocol error */
>
> I'm interested in which device have you used for testing this?
Hi,
These errors occured with the webcam 06f8:3009, but I do not know
exactly how. I thought about a speed problem. May be, when the webcam
cannot treat quickly enough the requests, either it returns errors or
it crashes. An other cause could be a bug in the ohci_hcd, but I do not
looked at it. The delay was just a test and it fixed the problem. That
is all the user wanted...
Regards.
--
Ken ar c'hentañ | ** Breizh ha Linux atav! **
Jef | http://moinejf.free.fr/
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2010-01-08 17:29 gspca - pac7302: Add a delay on loading the bridge registers Németh Márton
2010-01-09 12:36 ` Jean-Francois Moine
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