From: Jesse Brandeburg Date: Mon, 4 May 2009 11:19:42 +0000 (+0000) Subject: e1000: fix virtualization bug X-Git-Tag: MMI-PSA29.97-13-9~28017^2~71 X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=e151a60ad1faffb6241cf7eb6846353df1f33a32;p=GitHub%2FMotorolaMobilityLLC%2Fkernel-slsi.git e1000: fix virtualization bug a recent fix to e1000 (commit 15b2bee2) caused KVM/QEMU/VMware based virtualized e1000 interfaces to begin failing when resetting. This is because the driver in a virtual environment doesn't get to run instructions *AT ALL* when an interrupt is asserted. The interrupt code runs immediately and this recent bug fix allows an interrupt to be possible when the interrupt handler will reject it (due to the new code), when being called from any path in the driver that holds the E1000_RESETTING flag. the driver should use the __E1000_DOWN flag instead of the __E1000_RESETTING flag to prevent interrupt execution while reconfiguring the hardware. Signed-off-by: Jesse Brandeburg Signed-off-by: Jeff Kirsher Signed-off-by: David S. Miller --- diff --git a/drivers/net/e1000/e1000_main.c b/drivers/net/e1000/e1000_main.c index 6a46ceed9436..b1419e21b46b 100644 --- a/drivers/net/e1000/e1000_main.c +++ b/drivers/net/e1000/e1000_main.c @@ -3738,7 +3738,7 @@ static irqreturn_t e1000_intr(int irq, void *data) struct e1000_hw *hw = &adapter->hw; u32 rctl, icr = er32(ICR); - if (unlikely((!icr) || test_bit(__E1000_RESETTING, &adapter->flags))) + if (unlikely((!icr) || test_bit(__E1000_DOWN, &adapter->flags))) return IRQ_NONE; /* Not our interrupt */ /* IMS will not auto-mask if INT_ASSERTED is not set, and if it is