On Wed, Nov 3, 2010 at 8:16 AM, Tapas Mishra <mightydreams@xxxxxxxxx> wrote: > As far as I understand once the probe function(Not too sure) detects > or kernel detects then the driver would be looked up > and control would be handed over to driver. > If this is correct then how does probe works? Simply, whenever either a device or driver is registered with the bus, then probe function of matching driver is called by the bus subsystem. Refer : http://lxr.linux.no/#linux+v2.6.36/Documentation/PCI/pci.txt probe This probing function gets called (during execution 88 of pci_register_driver() for already existing 89 devices or later if a new device gets inserted) for 90 all PCI devices which match the ID table and are not 91 "owned" by the other drivers yet. This function gets 92 passed a "struct pci_dev *" for each device whose 93 entry in the ID table matches the device. The probe 94 function returns zero when the driver chooses to 95 take "ownership" of the device or an error code 96 (negative number) otherwise. 97 The probe function always gets called from process 98 context, so it can sleep. > Or how a particular > device's presence on PCI bus is detected. > > > -- > > -- > To unsubscribe from this list: send an email with > "unsubscribe kernelnewbies" to ecartis@xxxxxxxxxxxx > Please read the FAQ at http://kernelnewbies.org/FAQ > > -- Anuj Aggarwal Â.''`. : :â :ÂÂ # apt-get install hakuna-matata `. `'` ÂÂ `- -- To unsubscribe from this list: send an email with "unsubscribe kernelnewbies" to ecartis@xxxxxxxxxxxx Please read the FAQ at http://kernelnewbies.org/FAQ
