From 0b7761ec49e4e4064fe756c0c2133b5621f2d6c0 Mon Sep 17 00:00:00 2001 From: Filip Sadowski Date: Fri, 29 Dec 2017 08:50:05 -0500 Subject: [PATCH] i40e: Add delay after EMP reset for firmware to recover [ Upstream commit 1fa51a650e1deb50410677f1bd6c0ce17aa48a49 ] This patch adds necessary delay for 4.33 firmware to recover after EMP reset. Without this patch driver occasionally reinitializes structures too quickly to communicate with firmware after EMP reset causing AdminQ to timeout. Signed-off-by: Filip Sadowski Tested-by: Andrew Bowers Signed-off-by: Jeff Kirsher Signed-off-by: Sasha Levin Signed-off-by: Greg Kroah-Hartman --- drivers/net/ethernet/intel/i40e/i40e_main.c | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/drivers/net/ethernet/intel/i40e/i40e_main.c b/drivers/net/ethernet/intel/i40e/i40e_main.c index d36b799116e4..04dbf64fb1cb 100644 --- a/drivers/net/ethernet/intel/i40e/i40e_main.c +++ b/drivers/net/ethernet/intel/i40e/i40e_main.c @@ -7196,6 +7196,17 @@ static void i40e_rebuild(struct i40e_pf *pf, bool reinit, bool lock_acquired) } i40e_get_oem_version(&pf->hw); + if (test_bit(__I40E_EMP_RESET_INTR_RECEIVED, pf->state) && + ((hw->aq.fw_maj_ver == 4 && hw->aq.fw_min_ver <= 33) || + hw->aq.fw_maj_ver < 4) && hw->mac.type == I40E_MAC_XL710) { + /* The following delay is necessary for 4.33 firmware and older + * to recover after EMP reset. 200 ms should suffice but we + * put here 300 ms to be sure that FW is ready to operate + * after reset. + */ + mdelay(300); + } + /* re-verify the eeprom if we just had an EMP reset */ if (test_and_clear_bit(__I40E_EMP_RESET_INTR_RECEIVED, pf->state)) i40e_verify_eeprom(pf); -- 2.20.1