About module priority

[Abhijit Pawar]

Hi,

On Thu, 2012-04-19 at 20:10 +0530, Tirtha Ghosh wrote:
> Sorry missed ur whole details. In that case, u modify the existing
> driver and call ur part of ur code from common probe depending on ur
> special condition otherwise keep the existing flow. 
> 

There could be couple of ways:

1. If you have access to the kernel and going to flash the same on your
mobile, then you can modify the common probe of the SD card subsystem
and let it call your driver depending on the card and default driver in
case of other card. This will hold true if you can differentiate between
the cards.

2. If you dont have kernel sources then you can remove the  default
driver temporarily while your SD card is in place and load it later. You
may need another module to do this.  This will work in a scenario where
you just have one slot for SD Card. 

> Sent from my iPhone
> 
> On 19-Apr-2012, at 7:46 PM, Geraint Yang <geraint0923 at gmail.com>
> wrote:
> 
> 
> 
> > Hi Arun,
> > 
> > Thanks for your reply.
> > 
> > I have ever thought about this method, but my sd driver is only for
> > my own special sd card which is not the common sd card and my driver
> > could not deal with the common sd card. So I need the default sd
> > driver for other  common sd cards.
> > 
> > I hope that mmc core could let my driver probe first, if the sd card
> > is my special one, my driver will operate it  in my own way,
> > otherwise mmc core will call the prob function of the default sd
> > driver then.
> > 
> > On Thu, Apr 19, 2012 at 9:50 PM, Arun KS <getarunks at gmail.com>
> > wrote:
> >         Hi Geraint,
> >         
> >         On Thu, Apr 19, 2012 at 2:05 PM, Geraint Yang
> >         <geraint0923 at gmail.com> wrote:
> >                 Hi folks,
> >                 I am writing a kernel module for a sd card, but when
> >                 I insert a sd card into my box, the default sd
> >                 driver will probe before my driver, and my driver
> >                 will never have chance to probe. Is there any method
> >                 to make my driver probe the sd card before the
> >                 default sd driver?
> >                 
> >         Why can't you disable  the default sd card driver in
> >         your .config?
> >         
> >         
> >                 Thanks in advance.
> >                 
> >                 
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> >         
> > 
> > 
> > 
> > -- 
> > Geraint Yang 
> > Tsinghua University Department of Computer Science and Technology
> > 
> > 
> > 
> > 
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