netdev - [PATCH net] net: aquantia: fix wol configuration not applied sometimes

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Date:   Tue, 4 Jun 2019 13:23:49 +0000
From:   Igor Russkikh <Igor.Russkikh@...antia.com>
To:     "David S . Miller" <davem@...emloft.net>
CC:     "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        Igor Russkikh <Igor.Russkikh@...antia.com>,
        Nikita Danilov <Nikita.Danilov@...antia.com>
Subject: [PATCH net] net: aquantia: fix wol configuration not applied
 sometimes

From: Nikita Danilov <nikita.danilov@...antia.com>

WoL magic packet configuration sometimes does not work due to
couple of leakages found.

Mainly there was a regression introduced during readx_poll refactoring.

Next, fw request waiting time was too small. Sometimes that
caused sleep proxy config function to return with an error
and to skip WoL configuration.
At last, WoL data were passed to FW from not clean buffer.
That could cause FW to accept garbage as a random configuration data.

Signed-off-by: Nikita Danilov <nikita.danilov@...antia.com>
Signed-off-by: Igor Russkikh <igor.russkikh@...antia.com>
Fixes: 6a7f2277313b ("net: aquantia: replace AQ_HW_WAIT_FOR with readx_poll_timeout_atomic")
---
 .../aquantia/atlantic/hw_atl/hw_atl_utils.c        | 14 +++++++-------
 .../aquantia/atlantic/hw_atl/hw_atl_utils_fw2x.c   |  4 +++-
 2 files changed, 10 insertions(+), 8 deletions(-)

diff --git a/drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_utils.c b/drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_utils.c
index 1208f7ecdd76..3fc41da39a0a 100644
--- a/drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_utils.c
+++ b/drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_utils.c
@@ -335,13 +335,13 @@ static int hw_atl_utils_fw_upload_dwords(struct aq_hw_s *self, u32 a, u32 *p,
 {
 	u32 val;
 	int err = 0;
-	bool is_locked;
 
-	is_locked = hw_atl_sem_ram_get(self);
-	if (!is_locked) {
-		err = -ETIME;
+	err = readx_poll_timeout_atomic(hw_atl_sem_ram_get, self,
+					val, val == 1U,
+					10U, 100000U);
+	if (err < 0)
 		goto err_exit;
-	}
+
 	if (IS_CHIP_FEATURE(REVISION_B1)) {
 		u32 offset = 0;
 
@@ -353,8 +353,8 @@ static int hw_atl_utils_fw_upload_dwords(struct aq_hw_s *self, u32 a, u32 *p,
 			/* 1000 times by 10us = 10ms */
 			err = readx_poll_timeout_atomic(hw_atl_scrpad12_get,
 							self, val,
-							(val & 0xF0000000) ==
-							 0x80000000,
+							(val & 0xF0000000) !=
+							0x80000000,
 							10U, 10000U);
 		}
 	} else {
diff --git a/drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_utils_fw2x.c b/drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_utils_fw2x.c
index fbc9d6ac841f..9c16d85fb104 100644
--- a/drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_utils_fw2x.c
+++ b/drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_utils_fw2x.c
@@ -384,7 +384,7 @@ static int aq_fw2x_set_sleep_proxy(struct aq_hw_s *self, u8 *mac)
 	err = readx_poll_timeout_atomic(aq_fw2x_state2_get,
 					self, val,
 					val & HW_ATL_FW2X_CTRL_SLEEP_PROXY,
-					1U, 10000U);
+					1U, 100000U);
 
 err_exit:
 	return err;
@@ -404,6 +404,8 @@ static int aq_fw2x_set_wol_params(struct aq_hw_s *self, u8 *mac)
 
 	msg = (struct fw2x_msg_wol *)rpc;
 
+	memset(msg, 0, sizeof(*msg));
+
 	msg->msg_id = HAL_ATLANTIC_UTILS_FW2X_MSG_WOL;
 	msg->magic_packet_enabled = true;
 	memcpy(msg->hw_addr, mac, ETH_ALEN);
-- 
2.17.1