From abc599efa67bb4138536360e07d677052b19e392 Mon Sep 17 00:00:00 2001 From: Emmanuel Grumbach Date: Wed, 10 Feb 2021 14:29:26 +0200 Subject: [PATCH] iwlwifi: pcie: don't crash when rx queues aren't allocated in interrupt WARNING is better than crashing. Since this happened to me, be on the safe side. Signed-off-by: Emmanuel Grumbach Signed-off-by: Luca Coelho Link: https://lore.kernel.org/r/iwlwifi.20210210142629.d4651427fcda.I1bcecb73676d039e2521309c07fc6b6314a90546@changeid Signed-off-by: Luca Coelho --- drivers/net/wireless/intel/iwlwifi/pcie/rx.c | 3 +++ 1 file changed, 3 insertions(+) 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();