netdev - [PATCH net-next 06/15] sfc_ef100: don't call efx_reset

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Message-ID: <be1d33ee-4a31-f2d2-d4f8-77380a07dcc9@solarflare.com>
Date:   Fri, 3 Jul 2020 16:32:43 +0100
From:   Edward Cree <ecree@...arflare.com>
To:     <linux-net-drivers@...arflare.com>, <davem@...emloft.net>
CC:     <netdev@...r.kernel.org>
Subject: [PATCH net-next 06/15] 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 | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/sfc/efx_common.c b/drivers/net/ethernet/sfc/efx_common.c
index 5667694c6514..1bccd1f2cfa6 100644
--- a/drivers/net/ethernet/sfc/efx_common.c
+++ b/drivers/net/ethernet/sfc/efx_common.c
@@ -821,7 +821,11 @@ int efx_reset(struct efx_nic *efx, enum reset_type method)
 		   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)