Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1947590AbdDYMZ7 (ORCPT ); Tue, 25 Apr 2017 08:25:59 -0400 Received: from mail-wm0-f68.google.com ([74.125.82.68]:34805 "EHLO mail-wm0-f68.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1947535AbdDYMZP (ORCPT ); Tue, 25 Apr 2017 08:25:15 -0400 Date: Tue, 25 Apr 2017 14:25:04 +0200 From: Corentin Labbe To: pcnet32@frontier.com Cc: netdev@vger.kernel.org, linux-kernel@vger.kernel.org Subject: net: pcnet32: [BUG] IRQ disabled when resizing ring buffer Message-ID: <20170425122504.GA20805@Red> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.5.24 (2015-08-30) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2897 Lines: 47 Hello When resizing ring buffer on qemu/pcnet32 with linux-next and CONFIG_DMA_API_DEBUG=y, I got the following trace: [8862.793779] ------------[ cut here ]------------ [ 8862.793784] WARNING: CPU: 0 PID: 26592 at /linux-next/include/linux/dma-mapping.h:505 pcnet32_set_ringparam+0xd55/0xda0 [ 8862.793785] Modules linked in: [ 8862.793788] CPU: 0 PID: 26592 Comm: ethtool Tainted: G W 4.11.0-rc7-next-20170424+ #68 [ 8862.793789] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.10.1-0-g8891697-prebuilt.qemu-project.org 04/01/2014 [ 8862.793790] task: ffff880235390000 task.stack: ffff8801db300000 [ 8862.793792] RIP: 0010:pcnet32_set_ringparam+0xd55/0xda0 [ 8862.793794] RSP: 0018:ffff8801db303be0 EFLAGS: 00010046 [ 8862.793795] RAX: 0000000000000086 RBX: ffff880234d8d000 RCX: 0000000180800052 [ 8862.793797] RDX: 0000000000000004 RSI: ffffea00070b7700 RDI: ffff880236803a40 [ 8862.793798] RBP: ffff8801db303ca0 R08: 0000000000000001 R09: ffff880236a138a0 [ 8862.793799] R10: 00000000bb83e000 R11: ffff8800bb83e000 R12: 0000000000000004 [ 8862.793800] R13: 0000000000000010 R14: ffff8801db303cdc R15: ffffffff81807300 [ 8862.793803] FS: 00007f55edcc6700(0000) GS:ffff88023fc00000(0000) knlGS:0000000000000000 [ 8862.793804] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 8862.793805] CR2: 00007f55ed4eebe0 CR3: 00000001db2e0000 CR4: 00000000000006f0 [ 8862.793808] Call Trace: [ 8862.793811] ? get_page_from_freelist+0x263/0x930 [ 8862.793814] dev_ethtool+0xde3/0x20b0 [ 8862.793816] ? __alloc_pages_nodemask+0xd9/0xd70 [ 8862.793818] ? __rtnl_unlock+0x25/0x60 [ 8862.793821] ? netdev_run_todo+0x5c/0x320 [ 8862.793823] ? __might_sleep+0x50/0x90 [ 8862.793824] ? _cond_resched+0x14/0x30 [ 8862.793826] dev_ioctl+0x18c/0x620 [ 8862.793828] ? _raw_spin_unlock+0x9/0x20 [ 8862.793830] sock_do_ioctl+0x4f/0x60 [ 8862.793832] sock_ioctl+0x247/0x320 [ 8862.793834] do_vfs_ioctl+0xaa/0x720 [ 8862.793836] ? __do_page_fault+0x1d1/0x410 [ 8862.793838] SyS_ioctl+0x47/0x80 [ 8862.793840] entry_SYSCALL_64_fastpath+0x1a/0xa5 [ 8862.793842] RIP: 0033:0x7f55ed4eebe7 [ 8862.793843] RSP: 002b:00007ffd0b76bef8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 8862.793845] RAX: ffffffffffffffda RBX: 00007ffd0b76c050 RCX: 00007f55ed4eebe7 [ 8862.793846] RDX: 00007ffd0b76c060 RSI: 0000000000008946 RDI: 0000000000000003 [ 8862.793847] RBP: 00007ffd0b76bf20 R08: 000000000000000a R09: 0000000000000000 [ 8862.793848] R10: 000000000000053e R11: 0000000000000246 R12: 00007ffd0b76c060 [ 8862.793848] R13: 00007ffd0b76c1d0 R14: 0000000000420e6f R15: 0000000000000002 [ 8862.793850] Code: 25 19 e1 6f 00 4d 85 e4 0f 85 34 fd ff ff eb 95 48 c7 c2 20 ea 8a 81 48 c7 c6 32 a6 9c 81 48 89 df e8 80 a7 18 00 e9 33 ff ff ff <0f> ff e9 a2 f7 ff ff 0f ff 66 90 e9 2d f6 ff ff 0f ff 66 0f 1f [ 8862.793881] ---[ end trace ecb86a2cf3a149f7 ]--- Regards Corentin Labbe