[net-next 12/16] i40e: clear qtx_head before enabling Tx queue
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From: Jeff Kirsher <hidden>
Date: 2014-01-10 08:59:06
Subsystem:
intel ethernet drivers, networking drivers, the rest · Maintainers:
Tony Nguyen, Przemek Kitszel, Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
Revision v1 of 84 in this series; 1 review trailer.
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From: Shannon Nelson <redacted> Make sure the "new" qtx_head[q] register is cleared before enabling the Tx queue. Change-ID: I0c7a12815e343a5ae68807af172a35d6c6857935 Signed-off-by: Shannon Nelson <redacted> Signed-off-by: Jesse Brandeburg <redacted> Tested-by: Kavindya Deegala <redacted> Signed-off-by: Jeff Kirsher <redacted> --- drivers/net/ethernet/intel/i40e/i40e_main.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/drivers/net/ethernet/intel/i40e/i40e_main.c b/drivers/net/ethernet/intel/i40e/i40e_main.c
index 65c27cb..bc14a85 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_main.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_main.c@@ -3008,11 +3008,13 @@ static int i40e_vsi_control_tx(struct i40e_vsi *vsi, bool enable) continue; /* turn on/off the queue */ - if (enable) + if (enable) { + wr32(hw, I40E_QTX_HEAD(pf_q), 0); tx_reg |= I40E_QTX_ENA_QENA_REQ_MASK | I40E_QTX_ENA_QENA_STAT_MASK; - else + } else { tx_reg &= ~I40E_QTX_ENA_QENA_REQ_MASK; + } wr32(hw, I40E_QTX_ENA(pf_q), tx_reg);
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1.8.3.1