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authorJiri Benc <jbenc@redhat.com>2013-03-20 09:06:34 +0000
committerJeff Kirsher <jeffrey.t.kirsher@intel.com>2013-03-26 03:21:34 -0700
commit75517d92119a3cd364f618ee962055b3ded8c396 (patch)
treeca7db1604775d4bf6bd50276c1331ad19b110b46 /net/unix
parent05ec29e8fa9b6ec8d4ad5d2f6d5fc5467c7970bc (diff)
igb: fix PHC stopping on max freq
For 82576 MAC type, max_adj is reported as 1000000000 ppb. However, if this value is passed to igb_ptp_adjfreq_82576, incvalue overflows out of INCVALUE_82576_MASK, resulting in setting of zero TIMINCA.incvalue, stopping the PHC (instead of going at twice the nominal speed). Fix the advertised max_adj value to the largest value hardware can handle. As there is no min_adj value available (-max_adj is used instead), this will also prevent stopping the clock intentionally. It's probably not a big deal, other igb MAC types don't support stopping the clock, either. Signed-off-by: Jiri Benc <jbenc@redhat.com> Acked-by: Matthew Vick <matthew.vick@intel.com> Tested-by: Aaron Brown <aaron.f.brown@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Diffstat (limited to 'net/unix')
0 files changed, 0 insertions, 0 deletions

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