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Date:   Thu, 17 Jan 2019 07:36:17 +0000
From:   Camelia Alexandra Groza <camelia.groza@....com>
To:     Andrew Lunn <andrew@...n.ch>, kernel test robot <lkp@...el.com>
CC:     "f.fainelli@...il.com" <f.fainelli@...il.com>,
        "hkallweit1@...il.com" <hkallweit1@...il.com>,
        "davem@...emloft.net" <davem@...emloft.net>,
        "oss@...error.net" <oss@...error.net>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "lkp@...org" <lkp@...org>
Subject: RE: [net]  b8154ef682:
 WARNING:at_drivers/net/phy/phy_device.c:#phy_driver_register

> -----Original Message-----
> From: Andrew Lunn <andrew@...n.ch>
> Sent: Wednesday, January 16, 2019 15:41
> To: kernel test robot <lkp@...el.com>
> Cc: Camelia Alexandra Groza <camelia.groza@....com>;
> f.fainelli@...il.com; hkallweit1@...il.com; davem@...emloft.net;
> oss@...error.net; netdev@...r.kernel.org; linux-kernel@...r.kernel.org;
> lkp@...org
> Subject: Re: [net] b8154ef682:
> WARNING:at_drivers/net/phy/phy_device.c:#phy_driver_register
> 
> On Wed, Jan 16, 2019 at 04:58:58PM +0800, kernel test robot wrote:
> > FYI, we noticed the following commit (built with gcc-7):
> >
> > commit: b8154ef682a9a745880ecbb2ee26b16297c9bfd0 ("[PATCH net] net:
> phy: phy driver features are mandatory")
> > url: https://github.com/0day-ci/linux/commits/Camelia-Groza/net-phy-phy-driver-features-are-mandatory/20190116-004308
> >
> >
> > in testcase: trinity
> > with following parameters:
> >
> > 	runtime: 300s
> >
> > test-description: Trinity is a linux system call fuzz tester.
> > test-url: http://codemonkey.org.uk/projects/trinity/
> >
> >
> > on test machine: qemu-system-i386 -enable-kvm -cpu SandyBridge -smp 2
> -m 512M
> >
> > caused below changes (please refer to attached dmesg/kmsg for entire
> log/backtrace):
> >
> >
> > +--------------------------------------------------------------+------------+------------
> +
> > |                                                              | 2f960bd056 | b8154ef682 |
> > +--------------------------------------------------------------+------------+------------
> +
> > | boot_successes                                               | 45         | 0          |
> > | boot_failures                                                | 1          | 4          |
> > | BUG:kernel_timeout_in_torture_test_stage                     | 1          |            |
> > | WARNING:at_drivers/net/phy/phy_device.c:#phy_driver_register | 0
> | 4          |
> > | EIP:phy_driver_register                                      | 0          | 4          |
> > +--------------------------------------------------------------+------------+------------
> +
> >
> >
> >
> > [  458.251512] WARNING: CPU: 0 PID: 1 at
> drivers/net/phy/phy_device.c:2246 phy_driver_register+0x90/0xe0
> > [  458.260864] CPU: 0 PID: 1 Comm: swapper Tainted: G                T 4.20.0-
> 11080-gb8154ef6 #158
> > [  458.260864] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996),
> BIOS 1.10.2-1 04/01/2014
> > [  458.260864] EIP: phy_driver_register+0x90/0xe0
> > [  458.260864] Code: 5d 89 7b 08 89 03 89 d8 c7 43 14 02 00 00 00 e8 06 d3 e1
> ff 85 c0 89 c6 75 39 83 c4 0c 89 f0 5b 5e 5f 5d c3 8d b6 00 00 00 00 <0f> 0b b8 38
> 5b 2e 5e c7 04 24 00 00 00 00 31 c9 ba 01 00 00 00 be
> > [  458.260864] EAX: 5e2e5b50 EBX: 5e1a8fe0 ECX: 00000000 EDX: 00000001
> > [  458.260864] ESI: 00000000 EDI: 00000000 EBP: 4010defc ESP: 4010dee4
> > [  458.260864] DS: 007b ES: 007b FS: 0000 GS: 0000 SS: 0068 EFLAGS:
> 00210246
> > [  458.260864] CR0: 80050033 CR2: 00000000 CR3: 1e43a000 CR4: 000006b0
> > [  458.260864] Call Trace:
> > [  458.260864]  ? phy_drivers_register+0x37/0x90
> > [  458.260864]  ? phy_module_init+0x1b/0x1b
> > [  458.260864]  ? phy_module_init+0x19/0x1b
> > [  458.260864]  ? do_one_initcall+0xd9/0x24b
> 
> Hi Camelia
> 
> I think we need to extend your patch and print the name of the PHY
> which is missing the features pointer. I don't see anything here which
> allows me to determine which PHY caused the warning.

Hi

Sure, I'll send a v2.

Camelia

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