Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756453AbYHaEwQ (ORCPT ); Sun, 31 Aug 2008 00:52:16 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1750802AbYHaEwA (ORCPT ); Sun, 31 Aug 2008 00:52:00 -0400 Received: from mail.atheros.com ([12.36.123.2]:39473 "EHLO mail.atheros.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750796AbYHaEv7 (ORCPT ); Sun, 31 Aug 2008 00:51:59 -0400 From: To: CC: , , , , , , Jie Yang Subject: [PATCH]atl1e:fix bug [Bug 11454] New: atl1e - BUG: scheduling while atomic: modprobe/678/0x00000002 Date: Sun, 31 Aug 2008 12:51:58 +0800 Message-ID: <12201583182726-git-send-email-jie.yang@atheros.com> X-Mailer: git-send-email 1.5.2.2 MIME-Version: 1.0 Content-Type: text/plain Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 4206 Lines: 113 from Jie Yang On Saturday, August 30, 2008 5:27 AM Andrew Morton > On Fri, 29 Aug 2008 14:08:09 -0700 (PDT) > bugme-daemon@bugzilla.kernel.org wrote: > > > http://bugzilla.kernel.org/show_bug.cgi?id=11454 > > > > Summary: atl1e - BUG: scheduling while atomic: > > modprobe/678/0x00000002 > > Product: Drivers > > Version: 2.5 > > KernelVersion: 2.6.27-rc5 > > Platform: All > > OS/Version: Linux > > Tree: Mainline > > Status: NEW > > Severity: high > > Priority: P1 > > Component: Network > > AssignedTo: jgarzik@pobox.com > > ReportedBy: harn-solo@gmx.de > > > > > > Latest working kernel version: - > > Earliest failing kernel version: 2.6.27-rc1 > > Software: x86_64 > > > > drivers/net/atl1e/atl1e_hw.c: struct atl1e_adapter *adapter > = (struct atl1e_adapter *)hw->adapter; > drivers/net/atl1e/atl1e_hw.c: struct atl1e_adapter *adapter > = (struct atl1e_adapter *)hw->adapter; > drivers/net/atl1e/atl1e_hw.c: struct atl1e_adapter *adapter > = (struct atl1e_adapter *)hw->adapter; > > are unneeded and undesirable. hw->adapter already has type > atl1e_adapter*. > just as Matthew Wilcox mentioned: > Lockdep warns about the mdio_lock taken with interrupts enabled then > later taken from interrupt context. Initially, I considered changing > these to spin_lock_irq/spin_unlock_irq, but then I looked at > atl1e_phy_init() and saw that it calls msleep(). Sleeping while > holding a spinlock is not allowed either. > > In the probe path, we haven't registered the interrupt handler, so it > can't poke at this card yet. It's before we call register_netdev(), > so I don't think any other threads can reach this card either. If I'm > right, we don't need a spinlock at all. So, just do not take mdio_lock lock in atl1e_probe, and remove the unneeded (struct atl1e_adapter *) Signed-off-by: Jie Yang --- BTW: I do not know if this format is suitable for repling [Bugme-new], if it is not suitable, just let me know. diff --git a/drivers/net/atl1e/atl1e_hw.c b/drivers/net/atl1e/atl1e_hw.c index 949e753..8cbc1b5 100644 --- a/drivers/net/atl1e/atl1e_hw.c +++ b/drivers/net/atl1e/atl1e_hw.c @@ -397,7 +397,7 @@ static int atl1e_phy_setup_autoneg_adv(struct atl1e_hw *hw) */ int atl1e_phy_commit(struct atl1e_hw *hw) { - struct atl1e_adapter *adapter = (struct atl1e_adapter *)hw->adapter; + struct atl1e_adapter *adapter = hw->adapter; struct pci_dev *pdev = adapter->pdev; int ret_val; u16 phy_data; @@ -431,7 +431,7 @@ int atl1e_phy_commit(struct atl1e_hw *hw) int atl1e_phy_init(struct atl1e_hw *hw) { - struct atl1e_adapter *adapter = (struct atl1e_adapter *)hw->adapter; + struct atl1e_adapter *adapter = hw->adapter; struct pci_dev *pdev = adapter->pdev; s32 ret_val; u16 phy_val; @@ -525,7 +525,7 @@ int atl1e_phy_init(struct atl1e_hw *hw) */ int atl1e_reset_hw(struct atl1e_hw *hw) { - struct atl1e_adapter *adapter = (struct atl1e_adapter *)hw->adapter; + struct atl1e_adapter *adapter = hw->adapter; struct pci_dev *pdev = adapter->pdev; u32 idle_status_data = 0; diff --git a/drivers/net/atl1e/atl1e_main.c b/drivers/net/atl1e/atl1e_main.c index 7685b99..9b60352 100644 --- a/drivers/net/atl1e/atl1e_main.c +++ b/drivers/net/atl1e/atl1e_main.c @@ -2390,9 +2390,7 @@ static int __devinit atl1e_probe(struct pci_dev *pdev, } /* Init GPHY as early as possible due to power saving issue */ - spin_lock(&adapter->mdio_lock); atl1e_phy_init(&adapter->hw); - spin_unlock(&adapter->mdio_lock); /* reset the controller to * put the device in a known good starting state */ err = atl1e_reset_hw(&adapter->hw); -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/