[net-next 17/18] fm10k: Only trigger data path reset if fabric is up
flat view
STALE4054d
From: Jeff Kirsher <hidden>
Date: 2015-09-16 00:36:51
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
From: Alexander Duyck <redacted> This change makes it so that we only trigger the data path reset if the fabric is ready to handle traffic. The general idea is to avoid triggering the reset unless the switch API is ready for us. Otherwise we can just postpone the reset until we receive a switch ready notification. Signed-off-by: Alexander Duyck <redacted> Signed-off-by: Jacob Keller <jacob.e.keller@intel.com> Signed-off-by: Jeff Kirsher <redacted> --- drivers/net/ethernet/intel/fm10k/fm10k_pf.c | 6 ++++++ 1 file changed, 6 insertions(+)
diff --git a/drivers/net/ethernet/intel/fm10k/fm10k_pf.c b/drivers/net/ethernet/intel/fm10k/fm10k_pf.c
index 241b969..d806d87 100644
--- a/drivers/net/ethernet/intel/fm10k/fm10k_pf.c
+++ b/drivers/net/ethernet/intel/fm10k/fm10k_pf.c@@ -59,6 +59,11 @@ static s32 fm10k_reset_hw_pf(struct fm10k_hw *hw) if (reg & (FM10K_DMA_CTRL_TX_ACTIVE | FM10K_DMA_CTRL_RX_ACTIVE)) return FM10K_ERR_DMA_PENDING; + /* verify the switch is ready for reset */ + reg = fm10k_read_reg(hw, FM10K_DMA_CTRL2); + if (!(reg & FM10K_DMA_CTRL2_SWITCH_READY)) + goto out; + /* Inititate data path reset */ reg |= FM10K_DMA_CTRL_DATAPATH_RESET; fm10k_write_reg(hw, FM10K_DMA_CTRL, reg);
@@ -72,6 +77,7 @@ static s32 fm10k_reset_hw_pf(struct fm10k_hw *hw) if (!(reg & FM10K_IP_NOTINRESET)) err = FM10K_ERR_RESET_FAILED; +out: return err; }
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2.4.3