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| author | Bruce Allan <bruce.w.allan@intel.com> | 2008-08-08 18:35:51 -0700 |
|---|---|---|
| committer | Jeff Garzik <jgarzik@redhat.com> | 2008-08-14 04:40:03 -0400 |
| commit | 2d06cad1a5ceb3b04dc9547e261ad4fcebf7433d (patch) | |
| tree | 685175f1f7b6bbbde4b07a12391a112601544a97 /drivers/net/e1000e | |
| parent | 56e1f82968af79f70902008098a4687198142ce7 (diff) | |
| download | linux-2d06cad1a5ceb3b04dc9547e261ad4fcebf7433d.tar.gz linux-2d06cad1a5ceb3b04dc9547e261ad4fcebf7433d.tar.bz2 linux-2d06cad1a5ceb3b04dc9547e261ad4fcebf7433d.zip | |
e1000e: Set InterruptThrottleRate to default when invalid value used
During module load, seting the InterruptThrottleRate parameter to an
invalid value would result in the itr/itr_setting pair being set to
unexpected values which would result in poor performance.
Signed-off-by: Bruce Allan <bruce.w.allan@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
Diffstat (limited to 'drivers/net/e1000e')
| -rw-r--r-- | drivers/net/e1000e/param.c | 23 |
1 files changed, 19 insertions, 4 deletions
diff --git a/drivers/net/e1000e/param.c b/drivers/net/e1000e/param.c index 8effc3107f9a..b0499f27e5ff 100644 --- a/drivers/net/e1000e/param.c +++ b/drivers/net/e1000e/param.c @@ -327,11 +327,26 @@ void __devinit e1000e_check_options(struct e1000_adapter *adapter) e1000_validate_option(&adapter->itr, &opt, adapter); /* - * save the setting, because the dynamic bits - * change itr. clear the lower two bits - * because they are used as control + * Save the setting, because the dynamic bits + * change itr. */ - adapter->itr_setting = adapter->itr & ~3; + if (e1000_validate_option(&adapter->itr, &opt, + adapter) && + (adapter->itr == 3)) { + /* + * In case of invalid user value, + * default to conservative mode. + */ + adapter->itr_setting = adapter->itr; + adapter->itr = 20000; + } else { + /* + * Clear the lower two bits because + * they are used as control. + */ + adapter->itr_setting = + adapter->itr & ~3; + } break; } } else { |