Hi Sander,

> So i'm wondering is there a hardware limitation of stations that can connect 
> to 
> this mini-pci card in ap-mode ?

Yes, there's a hardware/firmware limitation of 16 "station entries".

> the first clients connect perfectly well but after 12 client have connected, 
> for 
> the 13th i get:
> 
> [  784.301106] wlan0: Allocated STA 00:0d:f0:2e:ee:02
> [  784.301117] wlan0: moving STA 00:0d:f0:2e:ee:02 to state 2
> [  784.301122] wlan0: moving STA 00:0d:f0:2e:ee:02 to state 3
> [  784.301141] iwlwifi 0000:00:05.0: Unable to prepare station 
> 00:0d:f0:2e:ee:02 for addition
> [  784.481399] iwlwifi 0000:00:05.0: Unable to add station 00:0d:f0:2e:ee:02 
> (-22)
> [  784.647835] wlan0: Destroyed STA 00:0d:f0:2e:ee:02
> [  785.828588] wlan0: Allocated STA 00:0d:f0:2e:ee:02
> [  785.828600] wlan0: moving STA 00:0d:f0:2e:ee:02 to state 2
> [  785.828605] wlan0: moving STA 00:0d:f0:2e:ee:02 to state 3
> [  785.828624] iwlwifi 0000:00:05.0: Unable to prepare station 
> 00:0d:f0:2e:ee:02 for addition
> [  786.044379] iwlwifi 0000:00:05.0: Unable to add station 00:0d:f0:2e:ee:02 
> (-22)
> [  786.219632] wlan0: Destroyed STA 00:0d:f0:2e:ee:02

Right. I'm not exactly sure why we put -EINVAL rather than -ENOSPC or
something like that, but this is a limitation.

> If it is a hardware limitation, are there any other intel mini-pci adapters 
> that 
> don't have this hardware limitation (or at least a highter one).

With the newer 7260/7265 adapters you might be able to go up to 14 or 15
stations (I haven't checked exactly), but that's not a significant
increase - the fundamental limit of 16 station entries is still there
and at least one is needed for internal tracking for multi-/broadcast
transmit transmit (and another one might be reserved for P2P on those
devices, and I might be forgetting another one perhaps which would mean
13 is the max)

I don't believe that the driver (or even firmware) would be able to work
around this.

johannes

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