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 8A3ABC43217 for ; Mon, 30 May 2022 14:09:09 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S239264AbiE3OHm (ORCPT ); Mon, 30 May 2022 10:07:42 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:57430 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S239765AbiE3OC3 (ORCPT ); Mon, 30 May 2022 10:02:29 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 459C7C5E71; Mon, 30 May 2022 06:39:39 -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 C179660DD5; Mon, 30 May 2022 13:39:38 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id EC641C3411F; Mon, 30 May 2022 13:39:36 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1653917978; bh=lomCL3SMCuCPyBBX6Sr6ek2rUvKOf8qrpC5Gi64OfM8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=frm8b7p9RB925HWjgJiXpM4WkLTvEVnYTGr1oE7N0oXXy+b43zTuo0MZuQHjkhjkr IIlpWAMYHxmMUX98aNUbW0sXkTJuRqSXbcnBVWQ1VHKD4EbWGQbfPZSRP8TT9/h2DH pk7EM9VbrMidkv4/5mysCr6OwVh6CbYBa7lfA3YwbfubPHNK9p2HNGP1N7VPyBROve LOzM0XKewTe2szYzpcEaSSqL06fVK1jC9t7sBwgzbIG5wA2SZo4yZS+wgub67yAhgI 1RvdQz90HU8hWFX26QenzK/HV9mAjOuv7r4z32WfCXydqzsUsXZYYMMawSFIQvl1Ju S4LIvbDYU9ebQ== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: James Smart , Justin Tee , "Martin K . Petersen" , Sasha Levin , james.smart@broadcom.com, dick.kennedy@broadcom.com, jejb@linux.ibm.com, linux-scsi@vger.kernel.org Subject: [PATCH AUTOSEL 5.15 026/109] scsi: lpfc: Fix call trace observed during I/O with CMF enabled Date: Mon, 30 May 2022 09:37:02 -0400 Message-Id: <20220530133825.1933431-26-sashal@kernel.org> X-Mailer: git-send-email 2.35.1 In-Reply-To: <20220530133825.1933431-1-sashal@kernel.org> References: <20220530133825.1933431-1-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-kernel@vger.kernel.org From: James Smart [ Upstream commit d6d45f67a11136cb88a70a29ab22ea6db8ae6bd5 ] The following was seen with CMF enabled: BUG: using smp_processor_id() in preemptible code: systemd-udevd/31711 kernel: caller is lpfc_update_cmf_cmd+0x214/0x420 [lpfc] kernel: CPU: 12 PID: 31711 Comm: systemd-udevd kernel: Call Trace: kernel: kernel: dump_stack_lvl+0x44/0x57 kernel: check_preemption_disabled+0xbf/0xe0 kernel: lpfc_update_cmf_cmd+0x214/0x420 [lpfc] kernel: lpfc_nvme_fcp_io_submit+0x23b4/0x4df0 [lpfc] this_cpu_ptr() calls smp_processor_id() in a preemptible context. Fix by using per_cpu_ptr() with raw_smp_processor_id() instead. Link: https://lore.kernel.org/r/20220412222008.126521-16-jsmart2021@gmail.com Co-developed-by: Justin Tee Signed-off-by: Justin Tee Signed-off-by: James Smart Signed-off-by: Martin K. Petersen Signed-off-by: Sasha Levin --- drivers/scsi/lpfc/lpfc_scsi.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/scsi/lpfc/lpfc_scsi.c b/drivers/scsi/lpfc/lpfc_scsi.c index 8c79264a935b..c6944b282e21 100644 --- a/drivers/scsi/lpfc/lpfc_scsi.c +++ b/drivers/scsi/lpfc/lpfc_scsi.c @@ -3917,7 +3917,7 @@ lpfc_update_cmf_cmpl(struct lpfc_hba *phba, else time = div_u64(time + 500, 1000); /* round it */ - cgs = this_cpu_ptr(phba->cmf_stat); + cgs = per_cpu_ptr(phba->cmf_stat, raw_smp_processor_id()); atomic64_add(size, &cgs->rcv_bytes); atomic64_add(time, &cgs->rx_latency); atomic_inc(&cgs->rx_io_cnt); @@ -3960,7 +3960,7 @@ lpfc_update_cmf_cmd(struct lpfc_hba *phba, uint32_t size) atomic_set(&phba->rx_max_read_cnt, size); } - cgs = this_cpu_ptr(phba->cmf_stat); + cgs = per_cpu_ptr(phba->cmf_stat, raw_smp_processor_id()); atomic64_add(size, &cgs->total_bytes); return 0; } -- 2.35.1