netdev - [PATCH net 5/8] i40e: fix validation of VF state in get resources

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Message-ID: <20250919184959.656681-6-anthony.l.nguyen@intel.com>
Date: Fri, 19 Sep 2025 11:49:55 -0700
From: Tony Nguyen <anthony.l.nguyen@...el.com>
To: davem@...emloft.net,
	kuba@...nel.org,
	pabeni@...hat.com,
	edumazet@...gle.com,
	andrew+netdev@...n.ch,
	netdev@...r.kernel.org
Cc: Lukasz Czapnik <lukasz.czapnik@...el.com>,
	anthony.l.nguyen@...el.com,
	przemyslaw.kitszel@...el.com,
	leszek.pepiak@...el.com,
	jeremiah.kyle@...el.com,
	gregkh@...uxfoundation.org,
	stable@...r.kernel.org,
	Aleksandr Loktionov <aleksandr.loktionov@...el.com>,
	Simon Horman <horms@...nel.org>,
	Rafal Romanowski <rafal.romanowski@...el.com>
Subject: [PATCH net 5/8] i40e: fix validation of VF state in get resources

From: Lukasz Czapnik <lukasz.czapnik@...el.com>

VF state I40E_VF_STATE_ACTIVE is not the only state in which
VF is actually active so it should not be used to determine
if a VF is allowed to obtain resources.

Use I40E_VF_STATE_RESOURCES_LOADED that is set only in
i40e_vc_get_vf_resources_msg() and cleared during reset.

Fixes: 61125b8be85d ("i40e: Fix failed opcode appearing if handling messages from VF")
Cc: stable@...r.kernel.org
Signed-off-by: Lukasz Czapnik <lukasz.czapnik@...el.com>
Reviewed-by: Aleksandr Loktionov <aleksandr.loktionov@...el.com>
Signed-off-by: Przemek Kitszel <przemyslaw.kitszel@...el.com>
Reviewed-by: Simon Horman <horms@...nel.org>
Tested-by: Rafal Romanowski <rafal.romanowski@...el.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@...el.com>
---
 drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c | 7 ++++++-
 drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.h | 3 ++-
 2 files changed, 8 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c b/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c
index c85715f75435..5ef3dc43a8a0 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c
@@ -1464,6 +1464,7 @@ static void i40e_trigger_vf_reset(struct i40e_vf *vf, bool flr)
 	 * functions that may still be running at this point.
 	 */
 	clear_bit(I40E_VF_STATE_INIT, &vf->vf_states);
+	clear_bit(I40E_VF_STATE_RESOURCES_LOADED, &vf->vf_states);
 
 	/* In the case of a VFLR, the HW has already reset the VF and we
 	 * just need to clean up, so don't hit the VFRTRIG register.
@@ -2130,7 +2131,10 @@ static int i40e_vc_get_vf_resources_msg(struct i40e_vf *vf, u8 *msg)
 	size_t len = 0;
 	int ret;
 
-	if (!i40e_sync_vf_state(vf, I40E_VF_STATE_INIT)) {
+	i40e_sync_vf_state(vf, I40E_VF_STATE_INIT);
+
+	if (!test_bit(I40E_VF_STATE_INIT, &vf->vf_states) ||
+	    test_bit(I40E_VF_STATE_RESOURCES_LOADED, &vf->vf_states)) {
 		aq_ret = -EINVAL;
 		goto err;
 	}
@@ -2233,6 +2237,7 @@ static int i40e_vc_get_vf_resources_msg(struct i40e_vf *vf, u8 *msg)
 				vf->default_lan_addr.addr);
 	}
 	set_bit(I40E_VF_STATE_ACTIVE, &vf->vf_states);
+	set_bit(I40E_VF_STATE_RESOURCES_LOADED, &vf->vf_states);
 
 err:
 	/* send the response back to the VF */
diff --git a/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.h b/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.h
index 5cf74f16f433..f558b45725c8 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.h
+++ b/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.h
@@ -41,7 +41,8 @@ enum i40e_vf_states {
 	I40E_VF_STATE_MC_PROMISC,
 	I40E_VF_STATE_UC_PROMISC,
 	I40E_VF_STATE_PRE_ENABLE,
-	I40E_VF_STATE_RESETTING
+	I40E_VF_STATE_RESETTING,
+	I40E_VF_STATE_RESOURCES_LOADED,
 };
 
 /* VF capabilities */
-- 
2.47.1