Problem: one driver and 4 instances with different parameters

Problem: one driver and 4 instances with different parameters

[Andrey Kamchatnikov]

Hi,

Could someone to make clear next question:

I have one driver, but I need to run 4 instances of it (I run insmod with 
different parameters) .

But when I try to install the second driver I've got an error, that driver 
with this name exists.

How can I istall them? I don't want to use 4 different driver's sources.

Thank you,

Andrey 

Re: Problem: one driver and 4 instances with different parameters

[Nobin Mathew]

I think you need to modify your driver. So that you need to do only
single insmod. and handle the 4 instances internally.

On 9/19/07, Andrey Kamchatnikov <andrey.kamchatnikov@tec-venture.de> wrote:
> Hi,
>
> Could someone to make clear next question:
>
> I have one driver, but I need to run 4 instances of it (I run insmod with
> different parameters) .
>
> But when I try to install the second driver I've got an error, that driver
> with this name exists.
>
> How can I istall them? I don't want to use 4 different driver's sources.
>
> Thank you,
>
> Andrey
>
> -
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Re: Problem: one driver and 4 instances with different parameters

[Andi Kleen]

"Andrey Kamchatnikov" <andrey.kamchatnikov@tec-venture.de> writes:

> I have one driver, but I need to run 4 instances of it (I run insmod
> with different parameters) .
> 
> But when I try to install the second driver I've got an error, that
> driver with this name exists.

The standard trick to do that is to copy the module binary to four different
names (the module name is not encoded in the binary)

But it would be better to just fix the driver to allow this
with a single instance with some other run time configuration
mechanism and not use module parameters (which 
are generally somewhat deprecated anyways) 

-Andi

Re: Problem: one driver and 4 instances with different parameters

[Randy Dunlap]

On 19 Sep 2007 10:26:54 +0200 Andi Kleen wrote:

> "Andrey Kamchatnikov" <andrey.kamchatnikov@tec-venture.de> writes:
> 
> > I have one driver, but I need to run 4 instances of it (I run insmod
> > with different parameters) .
> > 
> > But when I try to install the second driver I've got an error, that
> > driver with this name exists.
> 
> The standard trick to do that is to copy the module binary to four different
> names (the module name is not encoded in the binary)
> 
> But it would be better to just fix the driver to allow this
> with a single instance with some other run time configuration
> mechanism and not use module parameters (which 
> are generally somewhat deprecated anyways) 
      ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Eh?  Do you mean for IO,mem,irq type settings?  If so, then yes, ok.
Otherwise please explain what you mean...

---
~Randy
*** Remember to use Documentation/SubmitChecklist when testing your code ***

Re: Problem: one driver and 4 instances with different parameters

[Andreas Herrmann]

On Wed, Sep 19, 2007 at 08:54:58AM +0200, Andrey Kamchatnikov wrote:
> I have one driver, but I need to run 4 instances of it (I run insmod with different 
> parameters) .
> 
> But when I try to install the second driver I've got an error, that driver with this name 
> exists.

It might work using modprobe's "--name"-option:

  # modprobe -o foo driver
  # modprobe -o bar driver


Regards,

Andreas

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