diff mbox series

[11/12] iwlwifi: pcie: don't crash when rx queues aren't allocated in interrupt

Message ID iwlwifi.20210208144305.e86efd8e1818.I1bcecb73676d039e2521309c07fc6b6314a90546@changeid (mailing list archive)
State Superseded
Delegated to: Luca Coelho
Headers show
Series iwlwifi: updates intended for v5.12 2021-02-07 part 2 | expand

Commit Message

Luca Coelho Feb. 8, 2021, 12:48 p.m. UTC 
From: Emmanuel Grumbach <emmanuel.grumbach@intel.com>

WARNING is better than crashing. Since this happened to me,
be on the safe side.

Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
---
 drivers/net/wireless/intel/iwlwifi/pcie/rx.c | 3 +++
 1 file changed, 3 insertions(+)
diff mbox series

Patch

diff --git a/drivers/net/wireless/intel/iwlwifi/pcie/rx.c b/drivers/net/wireless/intel/iwlwifi/pcie/rx.c
index 534fe62b8a30..42426e25cac6 100644
--- a/drivers/net/wireless/intel/iwlwifi/pcie/rx.c
+++ b/drivers/net/wireless/intel/iwlwifi/pcie/rx.c
@@ -1658,6 +1658,9 @@  irqreturn_t iwl_pcie_irq_rx_msix_handler(int irq, void *dev_id)
 	if (WARN_ON(entry->entry >= trans->num_rx_queues))
 		return IRQ_NONE;
 
+	if (WARN_ONCE(!rxq, "Got MSI-X interrupt before we have Rx queues"))
+		return IRQ_NONE;
+
 	lock_map_acquire(&trans->sync_cmd_lockdep_map);
 
 	local_bh_disable();