From 1750a22fa9ec34d3842a78780c838d6bf88fc6b5 Mon Sep 17 00:00:00 2001 From: Mitch Williams Date: Fri, 9 Jan 2015 11:18:13 +0000 Subject: [PATCH] i40e: delay after VF reset Delay a minimum of 10ms after VF reset, to allow the hardware's internal FIFOs to flush. Change-ID: I8a02ddb28c9f0d7303a1eb21d0b2443e5b4c1cda Signed-off-by: Mitch Williams Tested-by: Jim Young Signed-off-by: Jeff Kirsher --- drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-) diff --git a/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c b/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c index 044019b9d406..4e4232a58843 100644 --- a/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c +++ b/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c @@ -668,13 +668,13 @@ void i40e_reset_vf(struct i40e_vf *vf, bool flr) /* poll VPGEN_VFRSTAT reg to make sure * that reset is complete */ - for (i = 0; i < 100; i++) { - /* vf reset requires driver to first reset the - * vf and then poll the status register to make sure - * that the requested op was completed - * successfully + for (i = 0; i < 10; i++) { + /* VF reset requires driver to first reset the VF and then + * poll the status register to make sure that the reset + * completed successfully. Due to internal HW FIFO flushes, + * we must wait 10ms before the register will be valid. */ - usleep_range(10, 20); + usleep_range(10000, 20000); reg = rd32(hw, I40E_VPGEN_VFRSTAT(vf->vf_id)); if (reg & I40E_VPGEN_VFRSTAT_VFRD_MASK) { rsd = true;