netdev - [PATCH net 3/4] bnxt_en: Fix AER reset logic on 57500 chips.

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Message-Id: <1592179030-4533-4-git-send-email-michael.chan@broadcom.com>
Date:   Sun, 14 Jun 2020 19:57:09 -0400
From:   Michael Chan <michael.chan@...adcom.com>
To:     davem@...emloft.net
Cc:     netdev@...r.kernel.org, kuba@...nel.org
Subject: [PATCH net 3/4] bnxt_en: Fix AER reset logic on 57500 chips.

AER reset should follow the same steps as suspend/resume.  We need to
free context memory during AER reset and allocate new context memory
during recovery by calling bnxt_hwrm_func_qcaps().  We also need
to call bnxt_reenable_sriov() to restore the VFs.

Fixes: bae361c54fb6 ("bnxt_en: Improve AER slot reset.")
Signed-off-by: Michael Chan <michael.chan@...adcom.com>
---
 drivers/net/ethernet/broadcom/bnxt/bnxt.c | 17 ++++++++++++-----
 1 file changed, 12 insertions(+), 5 deletions(-)

diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.c b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
index 0d97f47..47b45ea 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
@@ -12196,6 +12196,9 @@ static pci_ers_result_t bnxt_io_error_detected(struct pci_dev *pdev,
 		bnxt_close(netdev);

 	pci_disable_device(pdev);
+	bnxt_free_ctx_mem(bp);
+	kfree(bp->ctx);
+	bp->ctx = NULL;
 	rtnl_unlock();

 	/* Request a slot slot reset. */
@@ -12229,12 +12232,16 @@ static pci_ers_result_t bnxt_io_slot_reset(struct pci_dev *pdev)
 		pci_set_master(pdev);

 		err = bnxt_hwrm_func_reset(bp);
-		if (!err && netif_running(netdev))
-			err = bnxt_open(netdev);
-
-		if (!err)
-			result = PCI_ERS_RESULT_RECOVERED;
+		if (!err) {
+			err = bnxt_hwrm_func_qcaps(bp);
+			if (!err && netif_running(netdev))
+				err = bnxt_open(netdev);
+		}
 		bnxt_ulp_start(bp, err);
+		if (!err) {
+			bnxt_reenable_sriov(bp);
+			result = PCI_ERS_RESULT_RECOVERED;
+		}
 	}

 	if (result != PCI_ERS_RESULT_RECOVERED) {
-- 
1.8.3.1