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 4DC75C7EE45 for ; Mon, 12 Jun 2023 10:57:54 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236808AbjFLK5x (ORCPT ); Mon, 12 Jun 2023 06:57:53 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:60326 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236791AbjFLK5c (ORCPT ); Mon, 12 Jun 2023 06:57:32 -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 A98F96E8C for ; Mon, 12 Jun 2023 03:45:27 -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 8906B62418 for ; Mon, 12 Jun 2023 10:45:27 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 9F123C4339B; Mon, 12 Jun 2023 10:45:26 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1686566727; bh=yE6ZNkwiUyFipHu7AolJCJtUyVtwGLYZAofLAYPkzHA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=uvnuxRRvRxoCyAh/ZqiqUBnq0T0XA03BcS4WPwo8wX7ZGm3LwAVExgaFbJRyVNVga gueTJtaWnyoDpsnSJhWl0LNMPsrqttBxwG27EcP8iemsTdBYknVXYFUN1N5XFsiWmR 5Gz/b+I/dh6Y9RFlL48eGnudOo0FFDABC6ScYj6w= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Daniel Golle , Mark Brown , Sasha Levin Subject: [PATCH 6.3 001/160] spi: mt65xx: make sure operations completed before unloading Date: Mon, 12 Jun 2023 12:25:33 +0200 Message-ID: <20230612101715.190812770@linuxfoundation.org> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230612101715.129581706@linuxfoundation.org> References: <20230612101715.129581706@linuxfoundation.org> User-Agent: quilt/0.67 X-stable: review X-Patchwork-Hint: ignore MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Daniel Golle [ Upstream commit 4be47a5d59cbc9396a6ffd327913eb4c8d67a32f ] When unloading the spi-mt65xx kernel module during an ongoing spi-mem operation the kernel will Oops shortly after unloading the module. This is because wait_for_completion_timeout was still running and returning into the no longer loaded module: Internal error: Oops: 0000000096000005 [#1] SMP Modules linked in: [many, but spi-mt65xx is no longer there] CPU: 0 PID: 2578 Comm: block Tainted: G W O 6.3.0-next-20230428+ #0 Hardware name: Bananapi BPI-R3 (DT) pstate: 804000c5 (Nzcv daIF +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : __lock_acquire+0x18c/0x20e8 lr : __lock_acquire+0x9b8/0x20e8 sp : ffffffc009ec3400 x29: ffffffc009ec3400 x28: 0000000000000001 x27: 0000000000000004 x26: ffffff80082888c8 x25: 0000000000000000 x24: 0000000000000000 x23: ffffffc009609da8 x22: ffffff8008288000 x21: ffffff8008288968 x20: 00000000000003c2 x19: ffffff8008be7990 x18: 00000000000002af x17: 0000000000000000 x16: 0000000000000000 x15: ffffffc008d78970 x14: 000000000000080d x13: 00000000000002af x12: 00000000ffffffea x11: 00000000ffffefff x10: ffffffc008dd0970 x9 : ffffffc008d78918 x8 : 0000000000017fe8 x7 : 0000000000000001 x6 : 0000000000000000 x5 : ffffff807fb53910 x4 : 0000000000000000 x3 : 0000000000000027 x2 : 0000000000000027 x1 : 0000000000000000 x0 : 00000000000c03c2 Call trace: __lock_acquire+0x18c/0x20e8 lock_acquire+0x100/0x2a4 _raw_spin_lock_irq+0x58/0x74 __wait_for_common+0xe0/0x1b4 wait_for_completion_timeout+0x1c/0x24 0xffffffc000acc8a4 <--- used to be mtk_spi_transfer_wait spi_mem_exec_op+0x390/0x3ec spi_mem_no_dirmap_read+0x6c/0x88 spi_mem_dirmap_read+0xcc/0x12c spinand_read_page+0xf8/0x1dc spinand_mtd_read+0x1b4/0x2fc mtd_read_oob_std+0x58/0x7c mtd_read_oob+0x8c/0x148 mtd_read+0x50/0x6c ... Prevent this by completing in mtk_spi_remove if needed. Fixes: 9f763fd20da7 ("spi: mediatek: add spi memory support for ipm design") Signed-off-by: Daniel Golle Link: https://lore.kernel.org/r/ZFAF6pJxMu1z6k4w@makrotopia.org Signed-off-by: Mark Brown Signed-off-by: Sasha Levin --- drivers/spi/spi-mt65xx.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/spi/spi-mt65xx.c b/drivers/spi/spi-mt65xx.c index 9eab6c20dbc56..6e95efb50acbc 100644 --- a/drivers/spi/spi-mt65xx.c +++ b/drivers/spi/spi-mt65xx.c @@ -1275,6 +1275,9 @@ static int mtk_spi_remove(struct platform_device *pdev) struct mtk_spi *mdata = spi_master_get_devdata(master); int ret; + if (mdata->use_spimem && !completion_done(&mdata->spimem_done)) + complete(&mdata->spimem_done); + ret = pm_runtime_resume_and_get(&pdev->dev); if (ret < 0) return ret; -- 2.39.2