linux-kernel - [PATCH AUTOSEL 5.17 041/149] i40e: Add sending commands in atomic context

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Message-Id: <20220401142536.1948161-41-sashal@kernel.org>
Date:   Fri,  1 Apr 2022 10:23:48 -0400
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Jedrzej Jagielski <jedrzej.jagielski@...el.com>,
        Witold Fijalkowski <witoldx.fijalkowski@...el.com>,
        Gurucharan G <gurucharanx.g@...el.com>,
        Tony Nguyen <anthony.l.nguyen@...el.com>,
        Sasha Levin <sashal@...nel.org>, jesse.brandeburg@...el.com,
        davem@...emloft.net, kuba@...nel.org, pabeni@...hat.com,
        intel-wired-lan@...ts.osuosl.org, netdev@...r.kernel.org
Subject: [PATCH AUTOSEL 5.17 041/149] i40e: Add sending commands in atomic context

From: Jedrzej Jagielski <jedrzej.jagielski@...el.com>

[ Upstream commit 59b3d7350ff35c939b8e173eb2eecac80a5ee046 ]

Change functions:
- i40e_aq_add_macvlan
- i40e_aq_remove_macvlan
- i40e_aq_delete_element
- i40e_aq_add_vsi
- i40e_aq_update_vsi_params
to explicitly use i40e_asq_send_command_atomic(..., true)
instead of i40e_asq_send_command, as they use mutexes and do some
work in an atomic context.
Without this change setting vlan via netdev will fail with
call trace cased by bug "BUG: scheduling while atomic".

Signed-off-by: Witold Fijalkowski <witoldx.fijalkowski@...el.com>
Signed-off-by: Jedrzej Jagielski <jedrzej.jagielski@...el.com>
Tested-by: Gurucharan G <gurucharanx.g@...el.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@...el.com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/net/ethernet/intel/i40e/i40e_common.c | 21 +++++++++++--------
 1 file changed, 12 insertions(+), 9 deletions(-)

diff --git a/drivers/net/ethernet/intel/i40e/i40e_common.c b/drivers/net/ethernet/intel/i40e/i40e_common.c
index 9ddeb015eb7e..e830987a8c6d 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_common.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_common.c
@@ -1899,8 +1899,9 @@ i40e_status i40e_aq_add_vsi(struct i40e_hw *hw,
 
 	desc.flags |= cpu_to_le16((u16)(I40E_AQ_FLAG_BUF | I40E_AQ_FLAG_RD));
 
-	status = i40e_asq_send_command(hw, &desc, &vsi_ctx->info,
-				    sizeof(vsi_ctx->info), cmd_details);
+	status = i40e_asq_send_command_atomic(hw, &desc, &vsi_ctx->info,
+					      sizeof(vsi_ctx->info),
+					      cmd_details, true);
 
 	if (status)
 		goto aq_add_vsi_exit;
@@ -2287,8 +2288,9 @@ i40e_status i40e_aq_update_vsi_params(struct i40e_hw *hw,
 
 	desc.flags |= cpu_to_le16((u16)(I40E_AQ_FLAG_BUF | I40E_AQ_FLAG_RD));
 
-	status = i40e_asq_send_command(hw, &desc, &vsi_ctx->info,
-				    sizeof(vsi_ctx->info), cmd_details);
+	status = i40e_asq_send_command_atomic(hw, &desc, &vsi_ctx->info,
+					      sizeof(vsi_ctx->info),
+					      cmd_details, true);
 
 	vsi_ctx->vsis_allocated = le16_to_cpu(resp->vsi_used);
 	vsi_ctx->vsis_unallocated = le16_to_cpu(resp->vsi_free);
@@ -2673,8 +2675,8 @@ i40e_status i40e_aq_add_macvlan(struct i40e_hw *hw, u16 seid,
 	if (buf_size > I40E_AQ_LARGE_BUF)
 		desc.flags |= cpu_to_le16((u16)I40E_AQ_FLAG_LB);
 
-	status = i40e_asq_send_command(hw, &desc, mv_list, buf_size,
-				       cmd_details);
+	status = i40e_asq_send_command_atomic(hw, &desc, mv_list, buf_size,
+					      cmd_details, true);
 
 	return status;
 }
@@ -2715,8 +2717,8 @@ i40e_status i40e_aq_remove_macvlan(struct i40e_hw *hw, u16 seid,
 	if (buf_size > I40E_AQ_LARGE_BUF)
 		desc.flags |= cpu_to_le16((u16)I40E_AQ_FLAG_LB);
 
-	status = i40e_asq_send_command(hw, &desc, mv_list, buf_size,
-				       cmd_details);
+	status = i40e_asq_send_command_atomic(hw, &desc, mv_list, buf_size,
+					      cmd_details, true);
 
 	return status;
 }
@@ -3868,7 +3870,8 @@ i40e_status i40e_aq_delete_element(struct i40e_hw *hw, u16 seid,
 
 	cmd->seid = cpu_to_le16(seid);
 
-	status = i40e_asq_send_command(hw, &desc, NULL, 0, cmd_details);
+	status = i40e_asq_send_command_atomic(hw, &desc, NULL, 0,
+					      cmd_details, true);
 
 	return status;
 }
-- 
2.34.1