[ltp] (no subject)

[Martin Hauser]

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Hi There,


> I have written a piece of code to detect a pci device, but it is causing  segmentation fault. What might have gone wrong in the code..........
> Can any body please help me out with this.....................
>
givin it a shot i maybe see a general mistake there... , see below

> #include<linux/pci.h>
>  .................................
>  ...............................
>  .................................
>  
> int pci_init( void )
> {
>         struct pci_dev *pci_device = NULL;

a moment, to get this right, you declare something as NULL pointer...
and then you try below to use it? Or does pci_find_slot use this
pci_device pointer?

>         printk("\n Inside pci_init\n");
>  
>         if( !pci_present() )
>         {
>                 printk("\nPCI not supported\n");
>                 return 0;
>         }
>  
>         if(( pci_find_slot(1, PCI_DEVFN( 9, 0))) == NULL)
>         {
>                 printk("\n Device not foumd\n");
>                 return 0;  
>       }
>  
> 


>                 printk("\nVendor ID\t%x",pci_device->vendor);

				 this is where i guess your programm is segfaulting, right?
>                 printk("\nDevice ID\t%x",pci_device->device);
>                 printk("\nVendor ID\t%s",pci_device->name);
> 
>                 return 0;
> }


I hope this helps, as said, just a shot

Happy Progging

Martin
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