From: Shawn Starr <shawn.starr@rogers.com>
To: linux-kernel@vger.kernel.org
Subject: [Intel][RNG] PCI IDs commented out for 82801I (ICH9 Mobile and non-mobile)?
Date: Wed, 20 Mar 2013 16:42:22 -0400
Message-ID: <1597390.RUFC41Uyje@segfault.sh0n.net>
Organization: sh0n.net
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Hello folks,

I was looking at why I can't load the Intel RNG driver (or why it doesn't load automatically) and 
it just so happens I have both the mobile and non-mobile ICH9 chipset. Looking at the driver I noticed:

 /* BAM, CAM, DBM, FBM, GxM
       { PCI_DEVICE(0x8086, 0x2448) }, */
 
 /* BA, CA, DB, Ex, 6300, Fx, 631x/632x, Gx
       { PCI_DEVICE(0x8086, 0x244e) }, */

IDs from both machines:
 
00:1e.0 PCI bridge [0604]: Intel Corporation 82801 Mobile PCI Bridge [8086:2448] (rev 93)
00:1e.0 PCI bridge [0604]: Intel Corporation 82801 PCI Bridge [8086:244e] (rev 92)
 
I saw a thread from 2006 explaining the 50% chance there's no RNG (but these days all modern chipsets should have an RNG) and I know 
this chipset I have does have an RNG so I'd like to use the HW random generator vs software.

Do we need to revisit this? Even if I try to force it to load it still fails:

# modprobe intel_rng no_fwh_detect=-1 or =1 
modprobe: ERROR: could not insert 'intel_rng': No such device

Thanks,
Shawn
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