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Commit 1fa51a65 authored by Filip Sadowski's avatar Filip Sadowski Committed by Jeff Kirsher
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i40e: Add delay after EMP reset for firmware to recover 



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: default avatarFilip Sadowski <filip.sadowski@intel.com>
Tested-by: default avatarAndrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: default avatarJeff Kirsher <jeffrey.t.kirsher@intel.com>
parent 71dc3719

drivers/net/ethernet/intel/i40e/i40e_main.c

+11 −0
Original line number Diff line number Diff line
@@ -9215,6 +9215,17 @@ 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);