setup MaxReadReq to 4096 bytes definitely

Hello,

when installing the Mellanox drivers for infiniband, the installer complains that the MaxReadReq of my PCI card is too low, and that I need to set it to 4096. In the current session I do :

# IB_iface=$(lspci | grep Mellanox | awk '{print $1}')

# /usr/bin/setpci -s $IB_iface 68.W=4096

and it works.

BUT: after a reboot I have to do it again. How can I set it definitely to 4096? Is there a way to set the hardware to this value directly?

I could fix it adding the above 2 lines in an init script, but I guess there is a cleaner solution?

Thanks in advance

regards

Andrea