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Commit b1d73141 authored by Niranjana Vishwanathapura's avatar Niranjana Vishwanathapura
Browse files

msm: emac: fix the lockup issue in SGMII ISR 



Fix the lockup issue in SGMII ISR caused by the failure of interrupt status
clearing. When it happens, reset the SGMII PHY and MAC to recover.

Change-Id: I6fc586022fe85e0d247dc886e4f2d6524c5e7046
Acked-by: default avatarJie Luo <jluo@qti.qualcomm.com>
Signed-off-by: default avatarNiranjana Vishwanathapura <nvishwan@codeaurora.org>
parent f6cc8651

drivers/net/ethernet/msm/emac/emac_main.c

+11 −1
Original line number Diff line number Diff line
@@ -110,6 +110,8 @@ void emac_reinit_locked(struct emac_adapter *adpt) 
	}



	emac_down(adpt, EMAC_HW_CTRL_RESET_MAC);

	if (adpt->phy_mode == PHY_INTERFACE_MODE_SGMII)

		emac_hw_reset_sgmii(&adpt->hw);

	emac_up(adpt);



	CLI_ADPT_FLAG(STATE_RESETTING);
@@ -961,7 +963,15 @@ static irqreturn_t emac_sgmii_interrupt(int irq, void *data) 
		if (status & SGMII_ISR_AN_MASK)

			emac_check_lsc(adpt);



		emac_hw_clear_sgmii_intr_status(hw, status);

		if (emac_hw_clear_sgmii_intr_status(hw, status) != 0) {

			emac_warn(adpt, intr,

				  "failed to clear sgmii intr, status=0x%x\n",

				  status);

			/* reset */

			SET_ADPT_FLAG(TASK_REINIT_REQ);

			emac_task_schedule(adpt);

			break;

		}

	} while (1);



	return IRQ_HANDLED;