RE: Fwd: LiS-2.18 and driver open failure due to q->q_ptr being not Null.

 Hi,

I could get driver open() working on 2.6 kernel by building the drivers
as .o instead of .ko and using LiS method to convert .o to .ko as
mentioned in the LiS documentation.

My question here is building the modules as .ko directly without
following the LiS method should it work? 

Thanks
Ed

-----Original Message-----
From: [email protected]
[mailto:[email protected]] On Behalf Of Rodrigues,
Edward
Sent: Wednesday, February 02, 2005 1:31 PM
To: [email protected]
Cc: LiS Mailing List
Subject: RE: [Linux-streams] Fwd: LiS-2.18 and driver open failure due
to q->q_ptr being not Null.

 Hi Brian,

Thanks for the reponse.

This works fine now on 2.4 kernel with LiS-2.18 after adding qprocson(q)
& qprocsoff(q) in open() and close() respectively but not with 2.6
kernel.

Close() takes care of setting q_ptr to Null as you pointed out.

I am using simple test program just to open the device and this is the
first open()that fails, which shouldn't have to do anything with the
close().

I am manually doing mknod /dev/xyz c clone_drvr xyz_drvr. Is this
changed in 2.6? Since it enters my entry point I am assuming this should
be okay.

I will try with simple driver, if still an issue post the code.


Ed



-----Original Message-----
From: Brian F. G. Bidulock [mailto:[email protected]] 
Sent: Wednesday, February 02, 2005 12:43 PM
To: Rodrigues, Edward
Cc: LiS Mailing List
Subject: Re: [Linux-streams] Fwd: LiS-2.18 and driver open failure due
to q->q_ptr being not Null.

Edward,

The only reason I can think that that would happen is if you forgot
to do:

	q->q_ptr = WR(q)->q_ptr = NULL;

in your qclose(9) procedure.


Otherwise, I think you will have to share your qopen(9) and qclose(9)
procedure
to help you further.

--brian

On Tue, 01 Feb 2005, Dave Grothe wrote:

> 
>      Subject: LiS-2.18 and driver open failure due to q->q_ptr being
not
>      Null.
>      Date: Tue, 1 Feb 2005 13:47:23 -0500
>      From: "Rodrigues, Edward" <[email protected]>
>      To: <[email protected]>
>      Hi Dave,
>      I  was  trying  LiS-2.18 and 2.6 kernel with our drivers and
bumped
>      into
>      this  problem  where  my open fails because q->q_ptr is not null.
I
>      traced
>      this in lis_qopen() -> clone_open() and drvr_open(). It is fine
in
>      lis_qopen()  as  well  as clone_open() when it gets to the driver
I
>      have
>      wrong q.
>      I  tried  the  same with 2.4 kernel and ran into same issue. I
have
>      made
>      sure I use sys/LiS/module.h. I am sure I must be missing
something
>      basic.
>      Any help certainly appreciated.
>      Thanks
>      Ed

-- 
Brian F. G. Bidulock    | The reasonable man adapts himself to the |
[email protected]    | world; the unreasonable one persists in  |
http://www.openss7.org/ | trying  to adapt the  world  to himself. |
                        | Therefore  all  progress  depends on the |
                        | unreasonable man. -- George Bernard Shaw |
_______________________________________________
Linux-streams mailing list
[email protected]
http://gsyc.escet.urjc.es/mailman/listinfo/linux-streams