Messages in this thread | | | Date | Tue, 14 Mar 2006 18:00:17 +0300 | From | Sergey Vlasov <> | Subject | Re: [PATCH] [PNP] 'modalias' sysfs export |
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On Tue, Mar 14, 2006 at 01:47:47PM +0100, Pierre Ossman wrote: > Sergey Vlasov wrote: > > BTW, we can change the alias format for PNP device drivers to > > > > pnp:*dXXXYYYY* > > > > (note the additional "*" before the device ID). This would allow us to > > have a single-value "modalias" attribute for PNP logical devices too - > > it would have the form > > > > pnp:dXXXYYYYdXXXYYYYdXXXYYYY > > > > (listing all IDs, in this case sorting is not required, because each > > driver will match at most only a single dXXXYYYY entry). > > > > How do you guarantee that the modules are tried in the correct order? Is > it well defined in modprobe that pnp:*dABC0001* would match before > pnp:*dXYZ0001* if the modalias is pnp:dABC0001dXYZ0001 ?
No, the order is undefined. However, defining it will not really help - what if there is another similar device in the system, which is discovered earlier and brings in the generic driver before the second device is considered? In this case defining the module load order buys you nothing. Currently the only reliable solution to prevent a generic driver from driving a device which has a more specific driver is to blacklist the problematic device in the generic driver (e.g., usbhid has lots of blacklist entries because vendors like to abuse the HID class). [unhandled content-type:application/pgp-signature] | |