netdev - [PATCH v4 net-next 07/16] sfc_ef100: don't call efx_reset

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Message-ID: <be6b60fd-94a0-4b5f-f641-6ad98e0594ae@solarflare.com>
Date:   Fri, 24 Jul 2020 16:58:42 +0100
From:   Edward Cree <ecree@...arflare.com>
To:     <linux-net-drivers@...arflare.com>, <davem@...emloft.net>
CC:     <netdev@...r.kernel.org>
Subject: [PATCH v4 net-next 07/16] sfc_ef100: don't call efx_reset_down()/up()
 on EF100

We handle everything ourselves in ef100_reset(), rather than relying on
 the generic down/up routines.

Signed-off-by: Edward Cree <ecree@...arflare.com>
---
 drivers/net/ethernet/sfc/efx_common.c | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/drivers/net/ethernet/sfc/efx_common.c b/drivers/net/ethernet/sfc/efx_common.c
index 5667694c6514..26b05ec4e712 100644
--- a/drivers/net/ethernet/sfc/efx_common.c
+++ b/drivers/net/ethernet/sfc/efx_common.c
@@ -814,14 +814,18 @@ int efx_reset_up(struct efx_nic *efx, enum reset_type method, bool ok)
  */
 int efx_reset(struct efx_nic *efx, enum reset_type method)
 {
+	int rc, rc2 = 0;
 	bool disabled;
-	int rc, rc2;
 
 	netif_info(efx, drv, efx->net_dev, "resetting (%s)\n",
 		   RESET_TYPE(method));
 
 	efx_device_detach_sync(efx);
-	efx_reset_down(efx, method);
+	/* efx_reset_down() grabs locks that prevent recovery on EF100.
+	 * EF100 reset is handled in the efx_nic_type callback below.
+	 */
+	if (efx_nic_rev(efx) != EFX_REV_EF100)
+		efx_reset_down(efx, method);
 
 	rc = efx->type->reset(efx, method);
 	if (rc) {
@@ -849,7 +853,8 @@ int efx_reset(struct efx_nic *efx, enum reset_type method)
 	disabled = rc ||
 		method == RESET_TYPE_DISABLE ||
 		method == RESET_TYPE_RECOVER_OR_DISABLE;
-	rc2 = efx_reset_up(efx, method, !disabled);
+	if (efx_nic_rev(efx) != EFX_REV_EF100)
+		rc2 = efx_reset_up(efx, method, !disabled);
 	if (rc2) {
 		disabled = true;
 		if (!rc)