From: Bruce Allan Date: Sat, 9 Aug 2008 01:35:51 +0000 (-0700) Subject: e1000e: Set InterruptThrottleRate to default when invalid value used X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=2d06cad1a5ceb3b04dc9547e261ad4fcebf7433d;p=GitHub%2Fexynos8895%2Fandroid_kernel_samsung_universal8895.git 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 Signed-off-by: Jeff Kirsher Signed-off-by: Jeff Garzik --- 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 {