From patchwork Tue Apr 28 14:32:26 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: =?utf-8?q?Rafa=C5=82_Hibner?= X-Patchwork-Id: 11514797 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 0EA47112C for ; Tue, 28 Apr 2020 14:34:22 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id C9DF9206D7 for ; Tue, 28 Apr 2020 14:34:21 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="pgBVaDWC" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org C9DF9206D7 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=secom.com.pl Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:Message-Id:Date:Subject:To :From:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References: List-Owner; bh=7VYcf1UiQ/d6b18IK0pEKKVsIgk3a2To+K9v5A1ijrI=; b=pgBVaDWCg9Sswe vUIm4KNmNt9vo9zYpUJmXDUDwhOqa7PLEMXz4dneldiUNabU/07XMWdwTok0Er0+3GFE8RCgjBNrg D9r5tIVW+2LYGmhKnS7PEScDR0SZa9Zypqzu37BIpKYdNIjGh+ZhrQfq1XvcWIQzpRQ8qAgU8NXcE X+Oa1zla+ZKj0wxm9VNThJ0w+n4FTbeG4OsUdmrBs02UkqEYi6Ty76cq4OGWlsGre5tOumuiF8fnt eTNM3EPu+EIVwPwI+sJWeEWO/kzl4DfNJwmacf5fCdMDCOCXor4QP9deiZObVv4Cuh9asCBWaS7Jk h82KIIACY9AcfXGtBuMQ==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1jTRJS-0005hd-4f; Tue, 28 Apr 2020 14:34:18 +0000 Received: from mail.secom.com.pl ([213.216.87.26]) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1jTRJO-0005g0-5H for linux-arm-kernel@lists.infradead.org; Tue, 28 Apr 2020 14:34:16 +0000 Received: from debian-2019.secom.com.pl ([192.168.192.41]) by mail.secom.com.pl; Tue, 28 Apr 2020 16:33:47 +0200 From: =?utf-8?q?Rafa=C5=82_Hibner?= To: Subject: [PATCH] dma: zynqmp_dma: Initialize descriptor list after freeing during reset Date: Tue, 28 Apr 2020 16:32:26 +0200 Message-Id: <20200428143225.3357-1-rafal.hibner@secom.com.pl> X-Mailer: git-send-email 2.20.1 MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200428_073414_541963_2EBE060A X-CRM114-Status: UNSURE ( 8.69 ) X-CRM114-Notice: Please train this message. X-Spam-Score: 0.0 (/) X-Spam-Report: SpamAssassin version 3.4.4 on bombadil.infradead.org summary: Content analysis details: (0.0 points) pts rule name description ---- ---------------------- -------------------------------------------------- 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record 0.0 SPF_NONE SPF: sender does not publish an SPF Record X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: =?utf-8?q?Rafa=C5=82_Hibner?= , Radhey Shyam Pandey , Michal Simek , open list , Vinod Koul , Appana Durga Kedareswara rao , "open list:DMA GENERIC OFFLOAD ENGINE SUBSYSTEM" , Harini Katakam , Dan Williams , "moderated list:ARM/ZYNQ ARCHITECTURE" Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org List elements are not formally removed from list therefore list head is not initialized during zynqmp_dma_reset. Signed-off-by: Rafal Hibner This BUG causes kernel panic when transaction is unsuccessful: ------------[ cut here ]------------ [ 62.710730] list_add corruption. prev->next should be next (ffffffc07d308040), but was dead000000000100. (prev=ffffffc0540b40b8). [ 62.727960] WARNING: CPU: 0 PID: 1845 at /home/rafalh11/zynq_proj/zynq_platform/KERNEL/linux-xlnx/lib/list_debug.c:28 __list_add_valid+0x74/0xa0 [ 62.746374] Modules linked in: secom_mx_rpmsg(O) rpmsg_char secom_mx_retune(O) ad9680(O) ad5686_spi(O) ad5686(O) ad7298(O) ltc5594(O) lmx2594(O) ad8366(O) secom_mx(O) axi_jesd204_rx(O) axi_adxcvr(O) xilinx_transceiver(O) cf_axi_adc_core(O) hmc7044(O) [ 62.768546] CPU: 0 PID: 1845 Comm: mx Tainted: G O 4.19.0 #10 [ 62.775582] Hardware name: xlnx,zynqmp (DT) [ 62.779750] pstate: 60000005 (nZCv daif -PAN -UAO) [ 62.784524] pc : __list_add_valid+0x74/0xa0 [ 62.788690] lr : __list_add_valid+0x74/0xa0 [ 62.792855] sp : ffffff8008003da0 [ 62.796154] x29: ffffff8008003da0 x28: 0000000000000020 [ 62.801457] x27: 0000000000000000 x26: dead000000000100 [ 62.806760] x25: ffffffc07d308040 x24: ffffffc0540b40a0 [ 62.812064] x23: ffffffc07d308018 x22: 0000000000000000 [ 62.817359] x21: ffffffc07d308018 x20: ffffffc0540b40b8 [ 62.822654] x19: ffffffc0540b40b8 x18: ffffffffffffffff [ 62.827957] x17: 0000000000000000 x16: 0000000000000000 [ 62.833252] x15: ffffff8008f88648 x14: 3034303830336437 [ 62.838546] x13: ffffff8008f88670 x12: ffffff80085d0ec0 [ 62.843841] x11: ffffff8008f65018 x10: 0000000000000006 [ 62.849136] x9 : 657270202e6e6f69 x8 : 3462303435306366 [ 62.854431] x7 : 66666666663d7665 x6 : 00000000000001a2 [ 62.859726] x5 : 0000000000000064 x4 : 0000000000000000 [ 62.865020] x3 : 0000000000000000 x2 : ffffffffffffffff [ 62.870315] x1 : 0cbee765ba0ec900 x0 : 0000000000000000 [ 62.875611] Call trace: [ 62.878042] __list_add_valid+0x74/0xa0 [ 62.881864] zynqmp_dma_free_descriptor+0x48/0x100 [ 62.886644] zynqmp_dma_chan_desc_cleanup+0xb4/0xf8 [ 62.891505] zynqmp_dma_do_tasklet+0x68/0x110 [ 62.895847] tasklet_action_common.isra.3+0x7c/0x168 [ 62.900801] tasklet_action+0x24/0x30 [ 62.904447] __do_softirq+0x10c/0x200 [ 62.908092] irq_exit+0xac/0xc0 [ 62.911219] __handle_domain_irq+0x60/0xb0 [ 62.915305] gic_handle_irq+0x64/0xc0 [ 62.918951] el1_irq+0xb0/0x140 [ 62.922078] schedule_timeout+0x218/0x3a0 [ 62.926077] wait_for_common+0x170/0x268 [ 62.929983] wait_for_completion_timeout+0x10/0x18 [ 62.934761] ioctl+0x64/0x270 [secom_mx_retune] [ 62.939281] do_vfs_ioctl+0xb8/0x900 [ 62.942838] ksys_ioctl+0x44/0x90 [ 62.946137] __arm64_sys_ioctl+0x1c/0x28 [ 62.950044] el0_svc_common+0x60/0xe8 [ 62.953689] el0_svc_handler+0x6c/0x88 [ 62.957421] el0_svc+0x8/0xc [ 62.960284] ---[ end trace 91b4fdfe685446c4 ]--- [ 62.964934] ------------[ cut here ]------------ --- drivers/dma/xilinx/zynqmp_dma.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/dma/xilinx/zynqmp_dma.c b/drivers/dma/xilinx/zynqmp_dma.c index 931e41a72..a2b0be07e 100644 --- a/drivers/dma/xilinx/zynqmp_dma.c +++ b/drivers/dma/xilinx/zynqmp_dma.c @@ -453,6 +453,7 @@ static void zynqmp_dma_free_desc_list(struct zynqmp_dma_chan *chan, list_for_each_entry_safe(desc, next, list, node) zynqmp_dma_free_descriptor(chan, desc); + INIT_LIST_HEAD(list); } /**