From: =?UTF-8?q?Patryk=20Ma=C5=82ek?= <patryk.malek@intel.com>
Date: Tue, 28 Aug 2018 10:16:03 -0700
Subject: i40e: hold the rtnl lock on clearing interrupt scheme
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
Patch-mainline: v4.20-rc1
Git-commit: 5cba17b14182696d6bb0ec83a1d087933f252241
References: bsc#1111981 FATE#326312 FATE#326313
Hold the rtnl lock when we're clearing interrupt scheme
in i40e_shutdown and in i40e_remove.
Signed-off-by: Patryk Małek <patryk.malek@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
drivers/net/ethernet/intel/i40e/i40e_main.c | 8 ++++++++
1 file changed, 8 insertions(+)
--- a/drivers/net/ethernet/intel/i40e/i40e_main.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_main.c
@@ -14205,6 +14205,7 @@ static void i40e_remove(struct pci_dev *
mutex_destroy(&hw->aq.asq_mutex);
/* Clear all dynamic memory lists of rings, q_vectors, and VSIs */
+ rtnl_lock();
i40e_clear_interrupt_scheme(pf);
for (i = 0; i < pf->num_alloc_vsi; i++) {
if (pf->vsi[i]) {
@@ -14213,6 +14214,7 @@ static void i40e_remove(struct pci_dev *
pf->vsi[i] = NULL;
}
}
+ rtnl_unlock();
for (i = 0; i < I40E_MAX_VEB; i++) {
kfree(pf->veb[i]);
@@ -14424,7 +14426,13 @@ static void i40e_shutdown(struct pci_dev
wr32(hw, I40E_PFPM_WUFC,
(pf->wol_en ? I40E_PFPM_WUFC_MAG_MASK : 0));
+ /* Since we're going to destroy queues during the
+ * i40e_clear_interrupt_scheme() we should hold the RTNL lock for this
+ * whole section
+ */
+ rtnl_lock();
i40e_clear_interrupt_scheme(pf);
+ rtnl_unlock();
if (system_state == SYSTEM_POWER_OFF) {
pci_wake_from_d3(pdev, pf->wol_en);