From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 80C3EC38A02 for ; Fri, 1 Apr 2022 15:02:26 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1348452AbiDAPEF (ORCPT ); Fri, 1 Apr 2022 11:04:05 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:60068 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1349417AbiDAOzk (ORCPT ); Fri, 1 Apr 2022 10:55:40 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [IPv6:2604:1380:4641:c500::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 6255062BF6; Fri, 1 Apr 2022 07:43:50 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id F12FE60AC9; Fri, 1 Apr 2022 14:43:49 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 807EAC340EE; Fri, 1 Apr 2022 14:43:48 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1648824229; bh=EboOsaMNG1eMs0a1qxUQf1e/CapXfeAqIi3K8ChJLL8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=mhqfZNsgsC0UL8gLnhPBKGw6C0iIGKyTpbf/GiRdPCB0gAgCQCR2H3zAC7Ks/fqUZ eW2jcqqENHSFdNmL53hR21GyxyjSBzRDU/8HwNOaFKk1PqlC1CoBCpEkHTSSFEDBRP W2QCFYVgii6I/3BbyK22MWY0t3/BpET57xTmp7p4vX2y4Iehj//9yLY6c6pWzRMwsV M5AjE9Vxtv1bRCK0/61CAJVDuC7Q9zj+blqr9A7Feb+7+/1bGIZHmhdIBEl7TVzimp ttKcG+t47e2k2pUv2tDVhQv8POBPR9D39RLTmLlKQkpMlY2PDPJSmaB0+RIof7gDi3 iMMcUzOgpA1Aw== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Qi Liu , John Garry , "Martin K . Petersen" , Sasha Levin , jejb@linux.ibm.com, linux-scsi@vger.kernel.org Subject: [PATCH AUTOSEL 5.10 40/65] scsi: hisi_sas: Free irq vectors in order for v3 HW Date: Fri, 1 Apr 2022 10:41:41 -0400 Message-Id: <20220401144206.1953700-40-sashal@kernel.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20220401144206.1953700-1-sashal@kernel.org> References: <20220401144206.1953700-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org From: Qi Liu [ Upstream commit 554fb72ee34f4732c7f694f56c3c6e67790352a0 ] If the driver probe fails to request the channel IRQ or fatal IRQ, the driver will free the IRQ vectors before freeing the IRQs in free_irq(), and this will cause a kernel BUG like this: ------------[ cut here ]------------ kernel BUG at drivers/pci/msi.c:369! Internal error: Oops - BUG: 0 [#1] PREEMPT SMP Call trace: free_msi_irqs+0x118/0x13c pci_disable_msi+0xfc/0x120 pci_free_irq_vectors+0x24/0x3c hisi_sas_v3_probe+0x360/0x9d0 [hisi_sas_v3_hw] local_pci_probe+0x44/0xb0 work_for_cpu_fn+0x20/0x34 process_one_work+0x1d0/0x340 worker_thread+0x2e0/0x460 kthread+0x180/0x190 ret_from_fork+0x10/0x20 ---[ end trace b88990335b610c11 ]--- So we use devm_add_action() to control the order in which we free the vectors. Link: https://lore.kernel.org/r/1645703489-87194-4-git-send-email-john.garry@huawei.com Signed-off-by: Qi Liu Signed-off-by: John Garry Signed-off-by: Martin K. Petersen Signed-off-by: Sasha Levin --- drivers/scsi/hisi_sas/hisi_sas_v3_hw.c | 16 +++++++++++----- 1 file changed, 11 insertions(+), 5 deletions(-) diff --git a/drivers/scsi/hisi_sas/hisi_sas_v3_hw.c b/drivers/scsi/hisi_sas/hisi_sas_v3_hw.c index 50a1c3478a6e..b14638910efe 100644 --- a/drivers/scsi/hisi_sas/hisi_sas_v3_hw.c +++ b/drivers/scsi/hisi_sas/hisi_sas_v3_hw.c @@ -2372,17 +2372,25 @@ static irqreturn_t cq_interrupt_v3_hw(int irq_no, void *p) return IRQ_WAKE_THREAD; } +static void hisi_sas_v3_free_vectors(void *data) +{ + struct pci_dev *pdev = data; + + pci_free_irq_vectors(pdev); +} + static int interrupt_preinit_v3_hw(struct hisi_hba *hisi_hba) { int vectors; int max_msi = HISI_SAS_MSI_COUNT_V3_HW, min_msi; struct Scsi_Host *shost = hisi_hba->shost; + struct pci_dev *pdev = hisi_hba->pci_dev; struct irq_affinity desc = { .pre_vectors = BASE_VECTORS_V3_HW, }; min_msi = MIN_AFFINE_VECTORS_V3_HW; - vectors = pci_alloc_irq_vectors_affinity(hisi_hba->pci_dev, + vectors = pci_alloc_irq_vectors_affinity(pdev, min_msi, max_msi, PCI_IRQ_MSI | PCI_IRQ_AFFINITY, @@ -2394,6 +2402,7 @@ static int interrupt_preinit_v3_hw(struct hisi_hba *hisi_hba) hisi_hba->cq_nvecs = vectors - BASE_VECTORS_V3_HW; shost->nr_hw_queues = hisi_hba->cq_nvecs; + devm_add_action(&pdev->dev, hisi_sas_v3_free_vectors, pdev); return 0; } @@ -3313,7 +3322,7 @@ hisi_sas_v3_probe(struct pci_dev *pdev, const struct pci_device_id *id) dev_err(dev, "%d hw queues\n", shost->nr_hw_queues); rc = scsi_add_host(shost, dev); if (rc) - goto err_out_free_irq_vectors; + goto err_out_debugfs; rc = sas_register_ha(sha); if (rc) @@ -3340,8 +3349,6 @@ hisi_sas_v3_probe(struct pci_dev *pdev, const struct pci_device_id *id) err_out_register_ha: scsi_remove_host(shost); -err_out_free_irq_vectors: - pci_free_irq_vectors(pdev); err_out_debugfs: hisi_sas_debugfs_exit(hisi_hba); err_out_ha: @@ -3369,7 +3376,6 @@ hisi_sas_v3_destroy_irqs(struct pci_dev *pdev, struct hisi_hba *hisi_hba) devm_free_irq(&pdev->dev, pci_irq_vector(pdev, nr), cq); } - pci_free_irq_vectors(pdev); } static void hisi_sas_v3_remove(struct pci_dev *pdev) -- 2.34.1