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i40e: delay after VF reset

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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 <mitch.a.williams@intel.com>
Tested-by: Jim Young <james.m.young@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
This commit is contained in:
Mitch Williams 2015-01-09 11:18:13 +00:00 committed by Jeff Kirsher
parent 83840e4bd5
commit 1750a22fa9
1 changed files with 6 additions and 6 deletions
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12
drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c
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@ -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;