From: Jiri Slaby <jslaby@suse.cz>
Date: Fri, 22 Jan 2010 15:10:52 +0000 (-0300)
Subject: V4L/DVB: media: dvb/af9015, implement eeprom hashing
X-Git-Tag: v2.6.34-rc1~280^2~142
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=6c614044ff00bf3e7403ac6c4ed4e53db8c349f3;p=pandora-kernel.git

V4L/DVB: media: dvb/af9015, implement eeprom hashing

This will be useful for matching of IR tables later.

We read the eeprom anyway for dumping. Switch the dumping to
print_hex_dump_bytes and compute hash above that by
hash = 0;
for (u32 VAL) in (eeprom):
  hash *= GOLDEN_RATIO_PRIME_32
  hash += VAL; // while preserving endinaness

The computation is moved earlier to the flow, namely from
af9015_af9013_frontend_attach to af9015_read_config, so that
we can access the sum in af9015_read_config already.

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Acked-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
---

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