From patchwork Wed Feb 10 12:29:26 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Luca Coelho X-Patchwork-Id: 380635 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id B3023C433E0 for ; Wed, 10 Feb 2021 12:36:02 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 7824464E4B for ; Wed, 10 Feb 2021 12:36:02 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232021AbhBJMfq (ORCPT ); Wed, 10 Feb 2021 07:35:46 -0500 Received: from paleale.coelho.fi ([176.9.41.70]:45138 "EHLO farmhouse.coelho.fi" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S231830AbhBJMdm (ORCPT ); Wed, 10 Feb 2021 07:33:42 -0500 Received: from 91-156-6-193.elisa-laajakaista.fi ([91.156.6.193] helo=redipa.ger.corp.intel.com) by farmhouse.coelho.fi with esmtpsa (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.93) (envelope-from ) id 1l9oci-0049Yg-Fs; Wed, 10 Feb 2021 14:29:36 +0200 From: Luca Coelho To: kvalo@codeaurora.org Cc: linux-wireless@vger.kernel.org Date: Wed, 10 Feb 2021 14:29:26 +0200 Message-Id: X-Mailer: git-send-email 2.30.0 In-Reply-To: <20210210122927.315774-1-luca@coelho.fi> References: <20210210122927.315774-1-luca@coelho.fi> MIME-Version: 1.0 Subject: [PATCH v2 11/12] iwlwifi: pcie: don't crash when rx queues aren't allocated in interrupt Precedence: bulk List-ID: X-Mailing-List: linux-wireless@vger.kernel.org From: Emmanuel Grumbach 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 --- 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();